Diagnosis Procedure
- CHECK CONNECTOR
- Turn the ignition switch OFF.
- Disconnect the 12V battery cable from the negative terminal.
- Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- Pre - crash seat belt control unit (driver side)
- CAN gateway
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Repair the terminal and connector.
- CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
- Disconnect the connector of CAN gateway.
- Check the continuity between the CAN gateway harness connector terminals.
CAN gateway harness connector Continuity Connector No. Terminal No. M24 4 6 Existed 10 12 Existed
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Check the harness and repair or replace [if shield line or fuse block (J/B) is open] the root cause (CAN communication circuit 2 side).
- CHECK HARNESS FOR OPEN CIRCUIT
- Connect the connector of CAN gateway.
- Disconnect the connector of pre - crash seat belt control unit (driver side).
- Check the resistance between the pre - crash seat belt control unit (driver side) harness connector terminals.
Pre - crash seat belt control unit (driver side) harness connector Resistance (Ω) Connector No. Terminal No. B100 14 4 Approx. 54 - 66
Is the measurement value within the specification?
YES
GO TO STEP 4 .
NO
Repair the pre - crash seat belt control unit (driver side) branch line.
- CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the pre - crash seat belt control unit (driver side). Refer to DIAGNOSIS PROCEDURE .
Is the inspection result normal?
YES (Present error)
Replace the seat belt pre - tensioner retractor (driver side). Refer to REMOVAL AND INSTALLATION .
YES (Past error)
Error was detected in the pre - crash seat belt control unit (driver side) branch line.
NO
Repair the power supply and the ground circuit.