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6 Inspect the harness connector of the module that is not z The battery positive voltage input circuits z The switched battery positive voltage supply z The battery positive voltage output circuits z The ignition voltage input circuits z The ignition voltage output circuits z The ground circuits z The class 2 serial data circuits z Control Module References in Body Control z Testing for Intermittent Conditions and Poor z Connector Repairs in Wiring Systems Go to Step 8 Go to Step 7 7 Replace the module that is not communicating. Refer to IMPORTANT: Perform the module programming or setup procedure Go to Step 10 - 8 1. Install a scan tool. 2. Turn ON the ignition, with the engine OFF. 3. Select the Display DTCs function for the module which was not communicating. Does the scan tool display any DTCs which do not begin Go to Control Module References in Body Control System for applicable Diagnostic System Check Go to Step 9 9 Use the scan tool in order to clear the DTCs. Go to Step 10 - 10 Select the Display DTCs function for the modules which Go to Control Module References in Body Control System for
2004 Hummer H2 2004 ACCESSORIES & EQUIPMENT Data Link Communications - Hummer H2
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