Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: How To Proceed With Troubleshooting

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Pre-collision / Pre-collision System(for Hv Model) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the pre-collision system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.

NEXT

3.

INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)*

(a) Adjust the reflector height.

Click here

(b) Place the reflector.

Click here

(c) Connect the Techstream to the DLC3.

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

(e) Turn the Techstream on.

(f) Turn the cruise control main switch on.

(g) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.

(h) Check the amount of misalignment and make a note.

Body Electrical > Pre-Collision 2 > Utility

Tester Display

Front Beam Axis Misalignment Reading

(i) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.

(j) Check the amount of misalignment and make a note.

Body Electrical > Pre-Collision 2 > Utility

Tester Display

Front Beam Axis Offset Reading

(k) Calculate the "Dealership Axis Offset Angle (with On-line Calibration Angle)" using the values "Front Beam Axis Misalignment Reading" and "Front Beam Axis Offset Reading".

(1) "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"

Standard:

Dealership Axis Offset Angle (with On-line Calibration Angle)

Vertical

-2.2 to 1.6 deg.

Horizontal

-0.6 to 0.6 deg.

Result

Proceed to

The dealership axis offset angle (with on-line calibration angle) is within the specified range.

A

The dealership axis offset angle (with on-line calibration angle) is not within the specified range.

B
B

GO TO STEP 12

A

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check if the CAN communication system is functioning normally.

HINT:

Refer to CAN Bus Check in CAN Communication System.

Click here

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

5.

INSPECT WARNING LIGHT

(a) Check the condition of the warning lights on the combination meter assembly.

Result

Proceed to

Only the PCS warning light is illuminated

A

The PCS warning light is not illuminated

The PCS warning light and other warning lights are illuminated or blinking

B
B

GO TO MALFUNCTIONING SYSTEM
A

6.

INSPECT MULTI-INFORMATION DISPLAY

(a) Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.

Result

Proceed to

"Pre-Collision System Malfunction Visit Your Dealer" is displayed

A

Any of the following messages is displayed:

  • "Pre-Collision System Unavailable"
  • "Pre-Collision System Unavailable Clean Sensor"
  • "Front Camera Unavailable"
  • "Front Camera Unavailable Remove Debris On Windshield"

B

Warning message is not displayed

C
B

GO TO PROBLEM SYMPTOMS TABLE

C

CHECK CONDITIONS WHEN PRE-COLLISION SYSTEM DID NOT OPERATE

A

7.

CHECK FOR DTCs*

HINT:

Refer to DTC Check / Clear.

Click here

(a) Check for DTCs and note any codes that are output.

Body Electrical > Pre-Collision 2 > Trouble Codes

(b) Clear the DTCs.

Body Electrical > Pre-Collision 2 > Clear DTCs

(c) Recheck for DTCs.

(1) Attempt to duplicate the malfunction and check if the DTCs are output again.

Body Electrical > Pre-Collision 2 > Trouble Codes

Result

Proceed to

Malfunction is duplicated but DTCs are not output

A

Malfunction cannot be duplicated and DTCs are not output

B

DTCs are output

C
B

GO TO SYMPTOM SIMULATION

C

GO TO DTC CHART

A

8.

PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B
B

GO TO STEP 11

A

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

NEXT

10.

ADJUST, REPAIR OR REPLACE

NOTICE:

When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

Click here

NEXT

11.

CONFIRMATION TEST
NEXT

END

12.

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Perform millimeter wave radar sensor assembly adjustment.

Click here

NEXT

GO TO STEP 4

    Freeze Frame Data

    Initialization

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