Circuit/System Testing
- Ignition OFF, disconnect the harness connectors X3 and X4 from the BCM.
- Ignition OFF, test for less than 1.0 ohm between the following ground circuits and the negative terminal of the battery:
- X3 terminal 1
- X3 terminal 5
- X4 terminal 9
- If greater than the specified value, repair the ground circuit.
- Ignition ON, measure voltage on the B+ circuits X3 terminal 3 and X4 terminal 10. The voltage on the B+ circuits should not differ by greater than 2 volts.
- If not within the specified range, test the circuit for a short to ground or an open/high resistance.
- If all circuits test normal, replace the BCM.