Toyota CH-R Service 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 that the CAN communication system is functioning normally.

OK:

CAN communication system is functioning normally.

HINT:

  • Refer to CAN 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

Body Electrical > Occupant Detection > Trouble Codes

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

Body Electrical > Occupant Detection > Clear DTCs
NEXT

10.

DTC CHECK*

(a) Refer to DTC Check / Clear.

Click here

Body Electrical > Occupant Detection > Trouble Codes

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

    System Diagram
    SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Airbag Sensor Assembly ...

    System Description
    SYSTEM DESCRIPTION GENERAL (a) The occupant detection ECU estimates the weight of an occupant based on signals received from the 2 occupant classification sensors. The occupant detection ECU det ...

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