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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1065 (Instrument Panel System Displays, Gauges And Console) >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Inaccurate or Inoperative >> Test Description

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 number below refers to the step number on the diagnostic table.

  1. 5:  This test procedure may cause DTCs to set, which may cause other systems to be inoperative or disabled.
Speedometer and/or Odometer Inaccurate or Inoperative

Step Action Yes No
Schematic Reference:  Instrument Cluster Schematics  
1 Did you perform the Diagnostic System Check - Instrument Cluster? Go to Step 2  Go to Diagnostic System Check - Instrument Cluster 
2
  1. Install a scan tool.
  2. Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter in the ECM/PCM Engine Data 1 data list.
Does the VSS parameter match the speedometer display?		 Go to Step 3  Go to Step 4 
3 Does the odometer operate properly? Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4
IMPORTANT: Perform the compass calibration and variance procedure on the replacement instrument panel cluster (IPC).
Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement .Did you complete the replacement?		 Go to Step 5  -
5  Operate the system in order to verify the repair.
Use the scan tool in order to clear the DTCs that may have set in other modules during diagnosis.
Did you correct the condition?		 System OK Go to Step 2 
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