Test Description
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. 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: Tests for an intermittent condition.
- 3: Determines whether the failure is the result of a faulty front axle circuit or the instrument cluster.
- 4: Tests for proper signal voltage to the PCM.
- 5: Tests for proper ignition 1 voltage to the instrument cluster.
Four-Wheel Drive Indicator Inoperative
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Transfer Case Control Schematics | ||||
| 1 | Did you perform a Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Verify the fault is present. Does the system operate normally? |
- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Step 5 |
| 4 |
|
9-14 V | Go to Step 8 | Go to Step 9 |
| 5 | Test the ignition 1 voltage circuit for a proper voltage at the instrument cluster. Does the voltage measure within the specified value? |
9-14 V | Go to Step 6 | Go to Step 7 |
| 6 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement (without RPO SLT)
or Instrument Cluster Replacement (with RPO SLT)
. Did you complete the replacement? |
- | Go to Step 10 | - |
| 7 | Repair an open or high resistance in the ignition 1 voltage circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you complete the repair? |
- | Go to Step 10 | - |
| 8 | Replace the PCM. Refer to Control Module References
for replacement, set-up, and programming. Did you complete the replacement? |
- | Go to Step 10 | - |
| 9 |
|
- | Go to Step 10 | - |
| 10 | Operate the vehicle in order to determine if the symptom has been corrected. Is the symptom still present? |
- | System OK | Go to Step 2 |