Diagnostic Aids
| • | An open on the key in ignition switch signal circuit will intermittently cause the column not to unlock. |
| • | Disconnecting or opening the steering column lock feedback circuit will cause the BCM to enter a Fail Enable Standby mode. The steering column will remain inoperative until the Fail Enable Standby mode is cleared. To clear this mode, disconnect the BCM1 & IPC fuse in the I/P fuse blockfor 15 seconds. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Column/Ignition Lock Schematics | |||
1 | Did you perform the Steering Wheel and Column Diagnostic System Check? | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | Go to Diagnostic Aids | Go to Step 3 |
3 | Verify that the column will lock or unlock cycling the steering column lock function by cycling the ignition key and also removing the ignition key. Does the steering column lock unlock and lock normally? | Go to Step 4 | Go to Electronic Column Lock Does Not Unlock or Electronic Column Lock Does Not Lock . |
4 | With a test lamp, back probe between steering column lock signal circuit on the BCM and a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
5 | Test the control and ground circuit of the steering column lock feedback switch for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the steering column lock. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
8 | Replace the steering column lock. Refer to Electronic Column Lock Module Replacement - On Vehicle in Steering Wheel and Column. Did you complete the replacement? | Go to Step 10 | -- |
9 |
Important: Perform the BCM RPO Reprogram procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 10 | -- |
10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
