Test Description
WARNING: This page is about a different car, the 2005 Pontiac Aztek and 2005 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.
- 1: This step determines if the malfunction is present.
- 3: This step tests for an open in the vehicle speed signal circuit between the IPC and the navigation radio. A short would cause the IPC to malfunction as well as the navigation system.
DTC B0004
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Navigation System Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Verify the instrument panel cluster (IPC) speedometer operation. Does the speedometer work on the IPC? |
Go to Step 3 | Go to Diagnostic Starting Point - Instrument Panel, Gages and Console in Instrument Panel, Gages, and Console |
| 3 | Test the vehicle speed signal circuit for an open between the IPC and the navigation radio. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the navigation radio. 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 6 | Go to Step 5 |
| 5 | Replace the navigation radio. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 6 | - |
| 6 |
|
Go to Step 2 | System OK |