Toyota Avalon Service & Repair Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • *: Use the Techstream
  • Use the following procedure to troubleshoot the hybrid control system.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

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3.

CONNECT TECHSTREAM TO THE DLC3*

HINT:

If the display on the tester indicates a communication error, inspect the DLC3.

NEXT

4.

CHECK DTC AND FREEZE FRAME DATA*

Click here

HINT:

  • Make sure to save freeze frame data because the data is necessary for performing simulation tests.
  • For the hybrid control system, there are many DTCs, many of which can be stored due to a single malfunction. As a result, in some of the diagnosis procedures an instruction is provided to check for other DTCs. By following the diagnosis path based on the combination of output DTCs, it is possible to narrow down the problem early and avoid unnecessary diagnosis.
NEXT

5.

CLEAR DTC AND FREEZE FRAME DATA*

Click here

NEXT

6.

CONDUCT VISUAL INSPECTION

NEXT

7.

CONFIRM PROBLEM SYMPTOMS

HINT:

If the hybrid system does not start, perform steps 9 and 11 first.

Malfunction occurs.

GO TO STEP 10

Malfunction does not occur.

8.

DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS

NEXT

9.

CHECK FOR DTCS*

Click here

DTCs are not output.

GO TO STEP 16

DTCs are output.

10.

REFER TO DTC CHART

Click here

NEXT

11.

CONDUCT CIRCUIT INSPECTION

Malfunction confirmed.

GO TO STEP 13

Malfunction not confirmed.

12.

CHECK FOR INTERMITTENT PROBLEMS

Click here

NEXT

13.

IDENTIFY PROBLEM

NEXT

14.

ADJUST AND/OR REPAIR

NEXT

15.

CONDUCT CONFIRMATION TEST

NEXT

END

16.

CONDUCT BASIC INSPECTION

Malfunctioning parts confirmed.

GO TO STEP 18

Malfunctioning parts not confirmed.

17.

CHECK ECU POWER SOURCE CIRCUIT

NEXT

GO TO STEP 11

18.

CONDUCT PARTS INSPECTION

NEXT

GO TO STEP 13

    Generator Resolver Circuit

    HV Battery High-voltage Line Circuit

    See More:

    Toyota Avalon Service & Repair Manual > Power Steering System(for Hv Model): Check Assist Limit Record
    CAUTION / NOTICE / HINT HINT: Perform this troubleshooting procedure when no DTCs are output, including DTCs related to CAN communication system malfunctions. PROCEDURE 1. READ VALUE USING TECHSTREAM (ASSIST LIMIT RECORD 1) (a) Using the Techstream, read the Data List item "Assist Limit Record 1". C ...

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    Toyota Avalon Service & Repair Manual

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