Toyota Avalon Service & Repair Manual: Steering Angle Sensor Output (C1434)

DESCRIPTION

Steering angle sensor signals are input to the skid control ECU (brake booster with master cylinder assembly) via the CAN communication system.

HINT:

When a malfunction occurs in the communication line to the steering angle sensor, U0126 (Lost Communication With Steering Angle Sensor Module) is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

DTCs may be stored if one of the following occurs:

  • Steering angle sensor zero point malfunction.
  • Steering angle sensor signal malfunction.
  • Steering angle sensor installation abnormality.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1434

Steering Angle Sensor Output

701

When communication is normal, a steering angle sensor malfunction is detected.

  • Steering angle sensor installed improperly
  • Wire harness or connector
  • Steering angle sensor

Does not come on

VSC DTC

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG) again and check that no CAN communication system DTCs are output.

Click here

(d) Turn the power switch on (READY).

(e) Drive the vehicle at a speed of 35 km/h (22 mph), turn the steering wheel to the right and left, and check that no speed sensor and/or yaw rate and acceleration sensor DTCs are output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTC C1434 is output.

A

CAN communication system DTCs are output.

B

Speed sensor and/or yaw rate and acceleration sensor DTCs are output.

C

HINT:

  • If there is a malfunction in a speed sensor or the yaw rate and acceleration sensor (airbag ECU assembly), an abnormal value may be output even though the steering angle sensor is normal.
  • If speed sensor and yaw rate and acceleration sensor DTCs are output simultaneously, repair these malfunctions and inspect the steering angle sensor.
B

INSPECT CAN COMMUNICATION SYSTEM

C

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

2.

CHECK STEERING ANGLE SENSOR INSTALLATION

(a) Turn the power switch off.

(b) Check that the steering angle sensor has been installed properly.

Click here

OK:

The steering angle sensor installation is normal.

NG

INSTALL STEERING ANGLE SENSOR CORRECTLY

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Remove the steering wheel and column cover.

*a

Front view of wire harness connector

(to Steering Angle Sensor)

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

OK:

The connector is securely connected.

(c) Disconnect the G48 steering angle sensor connector.

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

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G48-4 (BAT) - Body ground

Always

11 to 14 V

G48-9 (IG) - Body ground

Power switch on (IG)

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK

4.

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

(a) Turn the power switch off.

*a

Front view of wire harness connector

(to Steering Angle Sensor)

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

NOTICE:

Before measuring the resistance of the steering angle sensor, turn the power switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G48-6 (ESS) - Body ground

1 minute after power switch off

Below 1 Ω

OK

REPLACE STEERING ANGLE SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    Steering Angle Sensor Internal Circuit (C1433)

    Malfunction in Yaw Rate Sensor (C1436)

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