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

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer and confirm the problem.

Click here

NEXT

3.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check and record DTCs and Freeze Frame Data.

for DTC Check / Clear: Click here

for Freeze Frame Data: Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

(b) Clear the DTCs and Freeze Frame Data.

for DTC Check / Clear: Click here

for Freeze Frame Data: Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(c) Reconfirm the DTCs.

(1) Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data.

Chassis > ABS/VSC/TRAC > Trouble Codes

HINT:

  • When CAN communication system DTCs are output, repair the CAN communication system first.

    Click here

  • If DTCs U0124, U0126, U0151 and/or U0293 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit.

    Click here

  • If the Techstream cannot communicate with the skid control ECU (brake booster with master cylinder assembly), inspect the CAN communication system.

    Click here

  • If there is no response from the skid control ECU (brake booster with master cylinder assembly), inspect the IG1 circuit of the skid control ECU (brake booster with master cylinder assembly).

    for C1241: Click here

    for C1242: Click here

Result

Proceed to

DTCs are output.

A

DTCs are not output. (Problem symptom does not occur.)

B

DTCs are not output. (Problem symptom occurs.)

C

B

GO TO STEP 5

C

GO TO STEP 6

A

4.

DIAGNOSTIC TROUBLE CODE CHART

(a) Proceed to Diagnostic Trouble Code Chart.

Click here

NEXT

GO TO STEP 7

5.

SYMPTOM SIMULATION

(a) Proceed to How to Proceed with Troubleshooting.

Click here

NEXT

6.

PROBLEM SYMPTOMS TABLE

(a) Proceed to Problem Symptoms Table.

Click here

NEXT

7.

CIRCUIT INSPECTION*

NEXT

8.

IDENTIFICATION OF PROBLEM

NEXT

9.

REPAIR OR REPLACEMENT

NEXT

10.

RECONFIRM DTC*

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Check if the same DTCs are output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

11.

CONFIRMATION TEST*

NEXT

END

    Freeze Frame Data

    Initialization

    See More:

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    DESCRIPTION The driver squib 2nd step circuit consists of the airbag ECU assembly, spiral cable sub-assembly and horn button assembly. The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met. These DTCs are stored when a malfunction is detected in the driver ...

    Toyota Avalon (XX50) 2019-2022 Owners Manual

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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