For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit/System Description
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the powertrain control module (PCM). The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC receives a serial data message from the PCM indicating the vehicle speed.
Reference Information
Schematic Reference
Connector End View Reference
Displays and Gages Connector End Views
Electrical Information Reference
Scan Tool Reference
Special Tools Required
Lifting and Jacking the Vehicle
Circuit/System Testing
- Ignition OFF, raise the vehicles drive wheels.
- Engine ON, transmission in drive, verify the scan tool Vehicle Speed Sensor (VSS) parameter matches the speedometer display.
- Verify that the odometer is operating properly.
| ⇒ | If the VSS parameter does not match the speedometer display, replace the IPC. |
| ⇒ | If the odometer is not operating properly, replace IPC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for the IPC replacement, setup, and programming
