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

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the occupant classification system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms.

Click here

NEXT

3.

CHECK CAN COMMUNICATION SYSTEM*

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

OK:

CAN communication system is functioning normally.

HINT:

  • Refer to Communication Bus Check in CAN Communication System.

    Click here

  • The occupant detection ECU is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communication system.
NG

GO TO CAN COMMUNICATION SYSTEM

OK

4.

PASSENGER AIRBAG ON/OFF INDICATOR CHECK

(a) Refer to Diagnosis System.

Click here

NEXT

5.

DTC CHECK (Present and History DTCs)*

(a) Refer to DTC Check / Clear.

Click here

OK:

DTCs are not output.

OK

GO TO PROBLEM SYMPTOMS TABLE

NG

6.

DIAGNOSTIC TROUBLE CODE CHART

(a) Refer to Diagnostic Trouble Code Chart.

Click here

NEXT

7.

CIRCUIT INSPECTION*

NEXT

8.

REPAIR

NEXT

9.

CLEAR DTCS (Present and History DTCs)*

(a) Refer to DTC Check / Clear.

Click here

NEXT

10.

DTC CHECK*

(a) Refer to DTC Check / Clear.

Click here

OK:

DTCs are not output.

NG

GO TO STEP 6

OK

11.

SYMPTOM SIMULATION

(a) Check the passenger airbag ON/OFF indicator condition.

NEXT

12.

CONFIRMATION TEST

NEXT

END

    Fail-safe Chart

    Initialization

    See More:

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    Toyota Avalon (XX50) 2019-2022 Owners Manual

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

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