Speedometer and/or Odometer Inaccurate or Inoperative

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Displays and Gauges Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Turn ON the ignition, with the engine OFF. Install a scan tool. With the scan tool, perform the segments test in the instrument panel cluster (IPC) scan tool output controls. Do all of the segments of the driver information center (DIC) illuminate?	Go to Step 3	Go to Step 6
3	Install a scan tool. Raise the vehicle drive wheels. Refer to Lifting and Jacking the Vehicle . Start the engine. Place the transmission into drive for automatic transmission or third gear for manual transmission. With the scan tool, observe the Vehicle Speed Sensor (VSS) parameter in the IPC Data 1 data list. Does the VSS parameter match the speedometer display?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 4
4	Test the vehicle speed signal circuit for a high resistance between the IPC and the powertrain control module (PCM). Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 7	Go to Step 5
5	Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 7	Go to Step 6
6	Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 7	-
7	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3