Circuit/System Testing
NOTE:
You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
- Connect a test lamp between each fuse test terminal of the ignition switch B+ circuit fuse and ground. The test lamp should illuminate.
- If the test lamp does not illuminate, test the circuits listed below for a short to ground. If all circuits test OK, replace the BCM.
- B+ terminal 4
- Ignition terminal 2
- Ignition terminal 3
- Ignition terminal 5
- Ignition voltage terminal BCM terminal 21, X4
- Disconnect the harness connector at the ignition switch.
- Connect a test lamp between the B+ circuit terminal 4 and ground. The test lamp should illuminate.
- If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
- Perform the ignition switch component test. Verify the switch passes the test.
- If the ignition switch does not test normal, replace the ignition switch.
- Disconnect the X 1 harness connector at the BCM, test for less than 1.0 V between the following ignition circuit terminals of the BCM and ground.
- terminal 2
- terminal 4
- terminal 14
- terminal 21
- If greater than specified, test the circuit for a short to voltage.
- Test for less than 1.0 Ω between the BCM and the ignition switch on the ignition circuits listed below:
- terminal 2, X1 and ignition switch terminal 5
- terminal 4, X1 and ignition switch terminal 6
- terminal 14, X1 and ignition switch terminal 2
- terminal 21, X1 and ignition switch terminal 3
- If greater than specified, test the circuit for open/high resistance
- If all circuits test normal, replace the BCM.
NOTE:
The ignition switch component test must be performed before proceeding with this test to verify the integrity of the switch.