Test Description
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step tests for an intermittent condition.
- 3: This step determines if the failure is the result of a faulty instrument cluster.
Differential Lock Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Differential Lock Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Rear Axle Controls? | Go to Step 2 | Go to Diagnostic System Check - Locking/Limited Slip Rear Axle |
| 2 | Verify the fault is present. Does the system operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 | Replace the PCM or TCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls-3.4L or Module, Transmission Control - Replace
in Automatic Transaxle 4T65-E for 3.6L. Did you complete the replacement? |
Go to Step 6 | - |
| 5 | Replace the instrument panel cluster. Refer to Instrument Panel Cluster (IPC) Replacement
in Instrument Panel, Gages, and Console. Did you complete the replacement? |
Go to Step 6 | - |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |