Toyota Avalon Service & Repair Manual: Open Circuit in Right Front Speed Sensor Circuit (C1330-C1467)

DESCRIPTION

Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS control.

HINT:

The output voltage values shown below are for when the vehicle wire harnesses are connected to the skid control ECU (brake actuator assembly) and the speed sensors.

for Front for Rear

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1330

Open Circuit in Right Front Speed Sensor Circuit

An open or short in the speed sensor signal circuit.

  • Front speed sensor RH
  • Front skid control sensor wire RH*
  • Speed sensor circuit
  • Front speed sensor installation

C1331

Open Circuit in Left Front Speed Sensor Circuit

An open or short in the speed sensor signal circuit.

  • Front speed sensor LH
  • Front skid control sensor wire LH*
  • Speed sensor circuit
  • Front speed sensor installation

C1332

Open Circuit in Right Rear Speed Sensor Circuit

An open or short in the speed sensor signal circuit.

  • Rear speed sensor RH (rear axle hub and bearing assembly RH)
  • Skid control sensor wire RH (No. 1 parking brake wire assembly)
  • Speed sensor circuit
  • Rear speed sensor installation

C1333

Open Circuit in Left Rear Speed Sensor Circuit

An open or short in the speed sensor signal circuit.

  • Rear speed sensor LH (rear axle hub and bearing assembly LH)
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Speed sensor circuit
  • Rear speed sensor installation

C1464

Front Speed Sensor RH Circuit

Any of the following is detected:

  • The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not detected for 0.4 seconds.
  • After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.
  • After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a front wheel speed of 0 km/h (0 mph) is detected.
  • The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):
    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)
    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
  • Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.
  • An abnormal signal is received from a wheel speed sensor.
  • Front speed sensor RH
  • Front skid control sensor wire RH*
  • Speed sensor circuit
  • Front speed sensor rotor RH (front axle hub sub-assembly RH)
  • Front speed sensor installation
  • Skid control ECU (brake actuator assembly)

C1465

Front Speed Sensor LH Circuit

Any of the following is detected:

  • The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not detected for 0.4 seconds.
  • After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.
  • After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a front wheel speed of 0 km/h (0 mph) is detected.
  • The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):
    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)
    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
  • Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.
  • An abnormal signal is received from a wheel speed sensor.
  • Front speed sensor LH
  • Front skid control sensor wire LH*
  • Speed sensor circuit
  • Front speed sensor rotor LH (front axle hub sub-assembly LH)
  • Front speed sensor installation
  • Skid control ECU (brake actuator assembly)

C1466

Rear Speed Sensor RH Circuit

Any of the following is detected:

  • The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not detected for 0.4 seconds.
  • After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.
  • After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a rear wheel speed of 0 km/h (0 mph) is detected.
  • The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):
    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)
    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
  • Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.
  • An abnormal signal is received from a wheel speed sensor.
  • Rear speed sensor RH (rear axle hub and bearing assembly RH)
  • Speed sensor circuit
  • Skid control sensor wire RH (No. 1 parking brake wire assembly)
  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
  • Rear speed sensor installation
  • Skid control ECU (brake actuator assembly)

C1467

Rear Speed Sensor LH Circuit

Any of the following is detected:

  • The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not detected for 0.4 seconds.
  • After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.
  • After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a rear wheel speed of 0 km/h (0 mph) is detected.
  • The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):
    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)
    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)
  • Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.
  • An abnormal signal is received from a wheel speed sensor.
  • Rear speed sensor LH (rear axle hub and bearing assembly LH)
  • Speed sensor circuit
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
  • Rear speed sensor installation
  • Skid control ECU (brake actuator assembly)
  • *: w/ AVS

HINT:

  • DTCs C1330 and C1464 are for the front speed sensor RH.
  • DTCs C1331 and C1465 are for the front speed sensor LH.
  • DTCs C1332 and C1466 are for the rear speed sensor RH.
  • DTCs C1333 and C1467 are for the rear speed sensor LH.
DTC Detection Conditions: C1464
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

The vehicle speed is more than 50.4 km/h (31 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph).

-

-

-

Malfunction Status

Pulses are not detected.

-

-

-

A wheel speed of 0 km/h (0 mph) is detected.

-

-

-

A front wheel speed of 0 km/h (0 mph) is detected.

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Detection Time

0.4 seconds

-

-

9 to 72 seconds or more (varies depending on the driving conditions)

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1464
 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnosis Condition

The vehicle speed is less than 100 km/h (62 mph).

-

-

-

The vehicle speed is 100 km/h (62 mph) or more.

-

-

-

Malfunction Status

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

-

-

-

An abnormal signal is received from a wheel speed sensor.

-

-

-

Detection Time

9 to 72 seconds or more (varies depending on the driving conditions)

9 to 72 seconds or more (varies depending on the driving conditions)

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1465
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

The vehicle speed is more than 50.4 km/h (31 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph).

-

-

-

Malfunction Status

Pulses are not detected.

-

-

-

A wheel speed of 0 km/h (0 mph) is detected.

-

-

-

A front wheel speed of 0 km/h (0 mph) is detected.

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Detection Time

0.4 seconds

-

-

9 to 72 seconds or more (varies depending on the driving conditions)

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1465
 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnosis Condition

The vehicle speed is less than 100 km/h (62 mph).

-

-

-

The vehicle speed is 100 km/h (62 mph) or more.

-

-

-

Malfunction Status

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

-

-

-

An abnormal signal is received from a wheel speed sensor.

-

-

-

Detection Time

9 to 72 seconds or more (varies depending on the driving conditions)

9 to 72 seconds or more (varies depending on the driving conditions)

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1466
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

The vehicle speed is more than 50.4 km/h (31 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph).

-

-

-

Malfunction Status

Pulses are not detected.

-

-

-

A wheel speed of 0 km/h (0 mph) is detected.

-

-

-

A rear wheel speed of 0 km/h (0 mph) is detected.

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Detection Time

0.4 seconds

-

-

9 to 72 seconds or more (varies depending on the driving conditions)

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1466
 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnosis Condition

The vehicle speed is less than 100 km/h (62 mph).

-

-

-

The vehicle speed is 100 km/h (62 mph) or more.

-

-

-

Malfunction Status

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

-

-

-

An abnormal signal is received from a wheel speed sensor.

-

-

-

Detection Time

9 to 72 seconds or more (varies depending on the driving conditions)

9 to 72 seconds or more (varies depending on the driving conditions)

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1467
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

The vehicle speed is more than 50.4 km/h (31 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph).

-

-

-

After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph).

-

-

-

Malfunction Status

Pulses are not detected.

-

-

-

A wheel speed of 0 km/h (0 mph) is detected.

-

-

-

A rear wheel speed of 0 km/h (0 mph) is detected.

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Detection Time

0.4 seconds

-

-

9 to 72 seconds or more (varies depending on the driving conditions)

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1467
 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnosis Condition

The vehicle speed is less than 100 km/h (62 mph).

-

-

-

The vehicle speed is 100 km/h (62 mph) or more.

-

-

-

Malfunction Status

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

-

-

-

The difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of the vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

-

-

-

Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

-

-

-

An abnormal signal is received from a wheel speed sensor.

-

-

-

Detection Time

9 to 72 seconds or more (varies depending on the driving conditions)

9 to 72 seconds or more (varies depending on the driving conditions)

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

for Front for Rear

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

Click here

PROCEDURE

1.

RECONFIRM DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC/EPB > Clear DTCs

(b) Turn the engine switch off.

(c) Start the engine.

(d) Drive the vehicle at a speed of 54 km/h (34 mph) or more for at least 120 seconds.

(e) Check if the same DTC is output.

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

Result

Proceed to

C1330 or C1464 is output

A

C1331 or C1465 is output

B

C1332 or C1466 is output

C

C1333 or C1467 is output

D

B

GO TO STEP 16

C

GO TO STEP 30

D

GO TO STEP 41

A

2.

CHECK FRONT SPEED SENSOR RH INSTALLATION

(a) Turn the engine switch off.

*1

Front Speed Sensor RH

*a

Correct

*b

Incorrect

*c

8.5 N*m

*d

No clearance

(b) Check the front speed sensor RH installation.

OK:

There is no clearance between the front speed sensor RH and the front steering knuckle RH.

The installation bolt is tightened properly.

Torque

8.5 N*m (87 kgf*cm, 75 in.*lbf)

NG

REINSTALL OR REPLACE FRONT SPEED SENSOR RH

OK

3.

CHECK FRONT SPEED SENSOR RH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor RH.

Click here

(b) Check the front speed sensor RH tip.

OK:

The front speed sensor RH tip is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor RH, clean the front speed sensor RH.
  • If the front speed sensor RH is damaged, replace the front speed sensor RH with a new one.
  • Check the front speed sensor RH signal after cleaning or replacement.

    Click here

Result

Proceed to

OK (w/o AVS)

A

OK (w/ AVS)

B

NG

C

B

GO TO STEP 9

C

CLEAN OR REPLACE FRONT SPEED SENSOR RH

A

4.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Front Speed Sensor RH)

(b) Disconnect the A59 front speed sensor RH connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A59-1 (FR+) - Body ground

Engine switch on (IG)

11 to 14 V

NG

GO TO STEP 8

OK

5.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A59-1 (FR+) - A59-2 (FR-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Front Speed Sensor RH)

NG

GO TO STEP 7

OK

6.

CHECK FRONT SPEED SENSOR ROTOR RH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor rotor RH (front axle hub sub-assembly RH).

Click here

(b) Check the front speed sensor rotor RH.

OK:

The front speed sensor rotor RH is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor rotor RH, clean the front speed sensor rotor RH.
  • If the front speed sensor rotor RH is damaged, replace the front speed sensor rotor RH with a new one.
  • Check the front speed sensor RH signal after cleaning or replacement.

    Click here

HINT:

  • The front speed sensor rotor RH is incorporated into the front axle hub sub-assembly RH.
  • If the front speed sensor rotor RH needs to be replaced, replace it together with the front axle hub sub-assembly RH.

Result

Proceed to

OK

A

NG (The front speed sensor rotor RH is damaged.)

B

NG (There is foreign matter on the front speed sensor rotor RH.)

C

A

REPLACE FRONT SPEED SENSOR RH

B

REPLACE FRONT AXLE HUB SUB-ASSEMBLY RH

C

CLEAN FRONT SPEED SENSOR ROTOR RH

7.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR RH)

(a) Turn the engine switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-26 (FR-) - A59-2 (FR-)

Always

Below 1 Ω

A28-26 (FR-) or A59-2 (FR-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR RH)

(a) Turn the engine switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-21 (FR+) - A59-1 (FR+)

Always

Below 1 Ω

A28-21 (FR+) or A59-1 (FR+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Front Speed Sensor RH)

(b) Disconnect the z16 front speed sensor RH connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z16-1 (FR+) - Body ground

Engine switch on (IG)

11 to 14 V

NG

GO TO STEP 14

OK

10.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z16-1 (FR+) - z16-2 (FR-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Front Speed Sensor RH)

NG

GO TO STEP 12

OK

11.

CHECK FRONT SPEED SENSOR ROTOR RH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor rotor RH (front axle hub sub-assembly RH).

Click here

(b) Check the front speed sensor rotor RH.

OK:

The front speed sensor rotor RH is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor rotor RH, clean the front speed sensor rotor RH.
  • If the front speed sensor rotor RH is damaged, replace the front speed sensor rotor RH with a new one.
  • Check the front speed sensor RH signal after cleaning or replacement.

    Click here

HINT:

  • The front speed sensor rotor RH is incorporated into the front axle hub sub-assembly RH.
  • If the front speed sensor rotor RH needs to be replaced, replace it together with the front axle hub sub-assembly RH.

Result

Proceed to

OK

A

NG (The front speed sensor rotor RH is damaged.)

B

NG (There is foreign matter on the front speed sensor rotor RH.)

C

A

REPLACE FRONT SPEED SENSOR RH

B

REPLACE FRONT AXLE HUB SUB-ASSEMBLY RH

C

CLEAN FRONT SPEED SENSOR ROTOR RH

12.

INSPECT FRONT SKID CONTROL SENSOR WIRE RH

(a) Turn the engine switch off.

*a

Front view of front skid control sensor wire RH

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A58 and z16 front skid control sensor wire RH connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z16-2 (FR-) - A58-5 (FR-)

Always

Below 1 Ω

z16-2 (FR-) or A58-5 (FR-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the front speed sensor RH signal after replacement.

Click here

NG

REPLACE FRONT SKID CONTROL SENSOR WIRE RH

OK

13.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SKID CONTROL SENSOR WIRE RH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-26 (FR-) - A58-5 (FR-)

Always

Below 1 Ω

A28-26 (FR-) or A58-5 (FR-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.

INSPECT FRONT SKID CONTROL SENSOR WIRE RH

(a) Turn the engine switch off.

*a

Front view of front skid control sensor wire RH

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A58 and z16 front skid control sensor wire RH connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z16-1 (FR+) - A58-6 (FR+)

Always

Below 1 Ω

z16-1 (FR+) or A58-6 (FR+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the front speed sensor RH signal after replacement.

Click here

NG

REPLACE FRONT SKID CONTROL SENSOR WIRE RH

OK

15.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SKID CONTROL SENSOR WIRE RH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-21 (FR+) - A58-6 (FR+)

Always

Below 1 Ω

A28-21 (FR+) or A58-6 (FR+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.

CHECK FRONT SPEED SENSOR LH INSTALLATION

(a) Turn the engine switch off.

*1

Front Speed Sensor LH

*a

Correct

*b

Incorrect

*c

8.5 N*m

*d

No clearance

(b) Check the front speed sensor LH installation.

OK:

There is no clearance between the front speed sensor LH and the front steering knuckle LH.

The installation bolt is tightened properly.

Torque

8.5 N*m (87 kgf*cm, 75 in.*lbf)

NG

REINSTALL OR REPLACE FRONT SPEED SENSOR LH

OK

17.

CHECK FRONT SPEED SENSOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor LH.

Click here

(b) Check the front speed sensor LH tip.

OK:

The front speed sensor LH tip is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor LH, clean the front speed sensor LH.
  • If the front speed sensor LH is damaged, replace the front speed sensor LH with a new one.
  • Check the front speed sensor LH signal after cleaning or replacement.

    Click here

Result

Proceed to

OK (w/o AVS)

A

OK (w/ AVS)

B

NG

C

B

GO TO STEP 23

C

CLEAN OR REPLACE FRONT SPEED SENSOR LH

A

18.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

(b) Disconnect the A61 front speed sensor LH connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A61-1 (FL+) - Body ground

Engine switch on (IG)

11 to 14 V

NG

GO TO STEP 22

OK

19.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A61-1 (FL+) - A61-2 (FL-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

NG

GO TO STEP 21

OK

20.

CHECK FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor rotor LH (front axle hub sub-assembly LH).

Click here

(b) Check the front speed sensor rotor LH.

OK:

The front speed sensor rotor LH is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor rotor LH, clean the front speed sensor rotor LH.
  • If the front speed sensor rotor LH is damaged, replace the front speed sensor rotor LH with a new one.
  • Check the front speed sensor LH signal after cleaning or replacement.

    Click here

HINT:

  • The front speed sensor rotor LH is incorporated into the front axle hub sub-assembly LH.
  • If the front speed sensor rotor LH needs to be replaced, replace it together with the front axle hub sub-assembly LH.

Result

Proceed to

OK

A

NG (The front speed sensor rotor LH is damaged.)

B

NG (There is foreign matter on the front speed sensor rotor LH.)

C

A

REPLACE FRONT SPEED SENSOR LH

B

REPLACE FRONT AXLE HUB SUB-ASSEMBLY LH

C

CLEAN FRONT SPEED SENSOR ROTOR LH

21.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR LH)

(a) Turn the engine switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-7 (FL-) - A61-2 (FL-)

Always

Below 1 Ω

A28-7 (FL-) or A61-2 (FL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

22.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR LH)

(a) Turn the engine switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-24 (FL+) - A61-1 (FL+)

Always

Below 1 Ω

A28-24 (FL+) or A61-1 (FL+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

23.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

(b) Disconnect the z15 front speed sensor LH connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z15-1 (FL+) - Body ground

Engine switch on (IG)

11 to 14 V

NG

GO TO STEP 28

OK

24.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z15-1 (FL+) - z15-2 (FL-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

NG

GO TO STEP 26

OK

25.

CHECK FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor rotor LH (front axle hub sub-assembly LH).

Click here

(b) Check the front speed sensor rotor LH.

OK:

The front speed sensor rotor LH is free of scratches, oil, and foreign matter.

NOTICE:

  • If there is oil or foreign matter on the front speed sensor rotor LH, clean the front speed sensor rotor LH.
  • If the front speed sensor rotor LH is damaged, replace the front speed sensor rotor LH with a new one.
  • Check the front speed sensor LH signal after cleaning or replacement.

    Click here

HINT:

  • The front speed sensor rotor LH is incorporated into the front axle hub sub-assembly LH.
  • If the front speed sensor rotor LH needs to be replaced, replace it together with the front axle hub sub-assembly LH.

Result

Proceed to

OK

A

NG (The front speed sensor rotor LH is damaged.)

B

NG (There is foreign matter on the front speed sensor rotor LH.)

C

A

REPLACE FRONT SPEED SENSOR LH

B

REPLACE FRONT AXLE HUB SUB-ASSEMBLY LH

C

CLEAN FRONT SPEED SENSOR ROTOR LH

26.

INSPECT FRONT SKID CONTROL SENSOR WIRE LH

(a) Turn the engine switch off.

*a

Front view of front skid control sensor wire LH

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A60 and z15 front skid control sensor wire LH connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z15-2 (FL-) - A60-5 (FL-)

Always

Below 1 Ω

z15-2 (FL-) or A60-5 (FL-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the front speed sensor LH signal after replacement.

Click here

NG

REPLACE FRONT SKID CONTROL SENSOR WIRE LH

OK

27.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SKID CONTROL SENSOR WIRE LH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-7 (FL-) - A60-5 (FL-)

Always

Below 1 Ω

A28-7 (FL-) or A60-5 (FL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

28.

INSPECT FRONT SKID CONTROL SENSOR WIRE LH

(a) Turn the engine switch off.

*a

Front view of front skid control sensor wire LH

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the A60 and z15 front skid control sensor wire LH connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z15-1 (FL+) - A60-6 (FL+)

Always

Below 1 Ω

z15-1 (FL+) or A60-6 (FL+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the front speed sensor LH signal after replacement.

Click here

NG

REPLACE FRONT SKID CONTROL SENSOR WIRE LH

OK

29.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SKID CONTROL SENSOR WIRE LH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-24 (FL+) - A60-6 (FL+)

Always

Below 1 Ω

A28-24 (FL+) or A60-6 (FL+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

30.

CHECK REAR SPEED SENSOR RH INSTALLATION

(a) Turn the engine switch off.

*1

Rear Speed Sensor RH

*a

OK

*b

NG

*c

No Clearance

(b) Check the rear speed sensor RH installation.

OK:

There is no clearance between the rear speed sensor RH and the rear axle hub RH.

HINT:

Because the rear axle hub and bearing assembly RH cannot be disassembled, if the rear speed sensor RH needs replacement, replace the rear axle hub and bearing assembly RH.

NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

OK

31.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Rear Speed Sensor RH (Rear Axle Hub and Bearing Assembly))

(b) Disconnect the Y5 rear speed sensor RH (rear axle hub and bearing assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Y5-2 (RA+) - Body ground

Engine switch on (IG)

11 to 14 V

Result

Proceed to

OK

A

NG (w/o AVS)

B

NG (w/ AVS)

C

B

GO TO STEP 37

C

GO TO STEP 39

A

32.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Y5-2 (RA+) - Y5-1 (RA-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Rear Speed Sensor RH (Rear Axle Hub and Bearing Assembly))

Result

Proceed to

OK

A

NG (w/o AVS)

B

NG (w/ AVS)

C

A

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

C

GO TO STEP 35

B

33.

INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y5 and YK5 skid control sensor wire RH (No. 1 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y5-1 (RA-) - YK5-2 (RR-)

Always

Below 1 Ω

Y5-1 (RA-) or YK5-2 (RR-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor RH signal after replacement.

Click here

NG

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

OK

34.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 1 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-37 (RR-) - YK5-2 (RR-)

Always

Below 1 Ω

A28-37 (RR-) or YK5-2 (RR-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

35.

INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y5 and YK3 skid control sensor wire RH (No. 1 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y5-1 (RA-) - YK3-2 (RR-)

Always

Below 1 Ω

Y5-1 (RA-) or YK3-2 (RR-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor RH signal after replacement.

Click here

NG

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

OK

36.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 1 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-37 (RR-) - YK3-2 (RR-)

Always

Below 1 Ω

A28-37 (RR-) or YK3-2 (RR-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

37.

INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y5 and YK5 skid control sensor wire RH (No. 1 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y5-2 (RA+) - YK5-1 (RR+)

Always

Below 1 Ω

Y5-2 (RA+) or YK5-1 (RR+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor RH signal after replacement.

Click here

NG

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

OK

38.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 1 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-22 (RR+) - YK5-1 (RR+)

Always

Below 1 Ω

A28-22 (RR+) or YK5-1 (RR+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

39.

INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y5 and YK3 skid control sensor wire RH (No. 1 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y5-2 (RA+) - YK3-1 (RR+)

Always

Below 1 Ω

Y5-2 (RA+) or YK3-1 (RR+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor RH signal after replacement.

Click here

NG

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

OK

40.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 1 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-22 (RR+) - YK3-1 (RR+)

Always

Below 1 Ω

A28-22 (RR+) or YK3-1 (RR+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

41.

CHECK REAR SPEED SENSOR LH INSTALLATION

(a) Turn the engine switch off.

*1

Rear Speed Sensor LH

*a

OK

*b

NG

*c

No Clearance

(b) Check the rear speed sensor LH installation.

OK:

There is no clearance between the rear speed sensor LH and the rear axle hub LH.

HINT:

Because the rear axle hub and bearing assembly LH cannot be disassembled, if the rear speed sensor LH needs replacement, replace the rear axle hub and bearing assembly LH.

NG

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

OK

42.

INSPECT BRAKE ACTUATOR ASSEMBLY (POWER SOURCE CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly))

(b) Disconnect the Y2 rear speed sensor LH (rear axle hub and bearing assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Y2-2 (LA+) - Body ground

Engine switch on (IG)

11 to 14 V

Result

Proceed to

OK

A

NG (w/o AVS)

B

NG (w/ AVS)

C

B

GO TO STEP 48

C

GO TO STEP 50

A

43.

INSPECT BRAKE ACTUATOR ASSEMBLY (GROUND CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Y2-2 (LA+) - Y2-1 (LA-)

Engine switch on (IG)

11 to 14 V

*a

Front view of wire harness connector

(to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly))

Result

Proceed to

OK

A

NG (w/o AVS)

B

NG (w/ AVS)

C

A

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

C

GO TO STEP 46

B

44.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y2 and YK6 skid control sensor wire LH (No. 2 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y2-1 (LA-) - YK6-2 (RL-)

Always

Below 1 Ω

Y2-1 (LA-) or YK6-2 (RL-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor LH signal after replacement.

Click here

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

45.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 2 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-23 (RL-) - YK6-2 (RL-)

Always

Below 1 Ω

A28-23 (RL-) or YK6-2 (RL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

46.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y2 and YK4 skid control sensor wire LH (No. 2 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y2-1 (LA-) - YK4-2 (RL-)

Always

Below 1 Ω

Y2-1 (LA-) or YK4-2 (RL-) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor LH signal after replacement.

Click here

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

47.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 2 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-23 (RL-) - YK4-2 (RL-)

Always

Below 1 Ω

A28-23 (RL-) or YK4-2 (RL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

48.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y2 and YK6 skid control sensor wire LH (No. 2 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y2-2 (LA+) - YK6-1 (RL+)

Always

Below 1 Ω

Y2-2 (LA+) or YK6-1 (RL+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor LH signal after replacement.

Click here

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

49.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 2 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-39 (RL+) - YK6-1 (RL+)

Always

Below 1 Ω

A28-39 (RL+) or YK6-1 (RL+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

50.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(c) Disconnect the Y2 and YK4 skid control sensor wire LH (No. 2 parking brake wire assembly) connectors.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y2-2 (LA+) - YK4-1 (RL+)

Always

Below 1 Ω

Y2-2 (LA+) or YK4-1 (RL+) - Body ground and other terminals

Always

10 kΩ or higher

NOTICE:

Check the rear speed sensor LH signal after replacement.

Click here

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

51.

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 2 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A28-39 (RL+) - YK4-1 (RL+)

Always

Below 1 Ω

A28-39 (RL+) or YK4-1 (RL+) - Body ground

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Skid Control ECU Malfunction (C1300)

    Zero Point Calibration of Deceleration Sensor undone (C1336)

    See More:

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