BCM BRANCH LINE CIRCUIT
Diagnosis Procedure
Inspection PROCEDURE
1.CHECK CONNECTOR
- Turn the ignition switch OFF.
- Disconnect the battery cable from the negative terminal.
- Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and connector side). Is the Inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
- Disconnect the connector of BCM.
- Check the resistance between the BCM harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the BCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the BCM. Refer to See: Body and Frame\Body Control Systems\Testing and Inspection\Component Tests and General Diagnostics\Power Supply And Ground Circuit.
Is the Inspection result normal?
YES (Present error)>>Replace the BCM. Refer to See: Body Control Module\Service and Repair.
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.
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