Toyota CH-R Service Manual: How To Proceed With Troubleshooting

Toyota CH-R Service Manual / Supplemental Restraint Systems / Occupant Classification System / 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

2.	CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms.

Click here

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.

GO TO CAN COMMUNICATION SYSTEM

4.	PASSENGER AIRBAG ON/OFF INDICATOR CHECK

(a) Refer to Diagnosis System.

Click here

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.

GO TO PROBLEM SYMPTOMS TABLE

6.	DIAGNOSTIC TROUBLE CODE CHART

(a) Refer to Diagnostic Trouble Code Chart.

Click here

7.	CIRCUIT INSPECTION*

REPAIR

9.	CLEAR DTCS (Present and History DTCs)*

(a) Refer to DTC Check / Clear.

Click here

Body Electrical > Occupant Detection > Clear DTCs

10.	DTC CHECK*

(a) Refer to DTC Check / Clear.

Click here

Body Electrical > Occupant Detection > Trouble Codes

OK:

DTCs are not output.

GO TO STEP 6

11.	SYMPTOM SIMULATION

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

12.	CONFIRMATION TEST

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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