Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The SERVICE COLUMN LOCK message is displayed or the steering column does not LOCK or UNLOCK. | ||||
1 | Did you perform the BCM Diagnostic System Check? | -- | Go to Step 2 | |
2 | Select BCM display DTC function on the scan tool. Does the scan tool display DTC B2587, B2588, B2592, or B2593? | -- | Go to Step 3 | |
3 | Did you disconnect the steering column lock motor connector with the ignition ON? | -- | Go to Step 23 | Go to Step 4 |
4 |
Does the scan tool display ENABLE STDBY? | -- | Go to Step 12 | Go to Step 5 |
5 | With a scan tool, observe the Key In Ignition parameter in the BCM data list. Does the scan tool display ACTIVE with the key IN the ignition and INACTIVE with the key OUT? | -- | Go to Step 6 | Go to Step 13 |
6 | With a scan tool, observe the Key Out Ignition parameter in the BCM data list. Does the scan tool display ACTIVE with the key OUT of the ignition and INACTIVE with the key IN? | -- | Go to Step 7 | Go to Step 16 |
7 |
Does the steering column LOCK and UNLOCK with each command? | -- | System OK | Go to Step 8 |
8 |
Does the steering column LOCK and UNLOCK with each command? | -- | Go to Step 10 | Go to Step 9 |
9 |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 21 | Go to Step 14 |
10 |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 19 | Go to Step 11 |
11 | Test the control and feed circuit of the steering column lock relay for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 17 |
12 | Test the signal and ground circuit of the steering column motor feedback for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
13 | Test the signal and ground circuit of the key in ignition switch for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 18 |
14 | Test the steering column lock drive (A) and drive (B) for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 15 |
15 | Test the steering column unlock or lock ground circuit for an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 17 |
16 | Test the signal and ground circuit of the key out of ignition switch for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 18 |
17 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 22 |
18 | Inspect for poor connections at the harness connector of the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 20 |
19 | Replace the steering column lock relay. Did you complete the replacement? | -- | Go to Step 23 | -- |
20 | Replace the ignition lock cylinder. Refer to Ignition Switch Lock Cylinder Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
21 | Replace the steering column lock motor. Refer to Electronic Column Lock Module - Disassemble - Off Vehicle . Did you complete the replacement? | -- | Go to Step 23 | -- |
22 |
Important: Perform the BCM RPO Reprogram procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration Replace the BCM. Refer to Body Control Module Replacement Did you complete the replacement? | -- | Go to Step 23 | -- |
23 |
Did you correct the condition? | -- | System OK | Go to Step 2 |
