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Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Scan Tool Data List Circuit/System Testing 1. Ignition OFF, raise the vehicles drive wheels. 2. Engine ON, transmission in drive, verify the scan tool Vehicle Speed Sensor parameter matches the speedometer display. If the Vehicle Speed Sensor parameter does not match the speedometer display, 3. Verify that the odometer is operating properly. If the odometer is not operating properly, replace the IPC. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for IPC replacement, setup and programming TACHOMETER INACCURATE OR INOPERATIVE 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 engine speed based on the information from the
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Displays and Gages - H3
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