Schematic Reference: Body Control System Schematics in Body Control System, Instrument Cluster Schematics in Instrument Panel, Gages, and Console, Engine Controls Schematics in Engine Controls - 2.6L and 3.2L, Engine Controls Schematics in Engine Controls - 3.6L (LY7), or Engine Controls Schematics in Engine Controls - 5.7L

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Engine Electrical Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Engine Electrical

1. Install a scan tool.
2. Start the engine.
3. Turn off all accessories.
4. Increase engine speed to 1,500 RPM.
5. With a scan tool, observe the Battery Voltage parameter in the dash integration module (DIM) data list, engine control module (ECM) data list, and the instrument panel cluster (IPC) data list.
6. Compare the voltages.

Does all of the voltage measure within the specified range?

11-16 V

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Does all of the voltage measure outside the specified range?

11-16 V

Go to Charging System Test

Go to Step 4

Test the battery positive voltage circuit of the affected module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 7

Go to Step 5

Inspect for poor connections at the harness connector of the affected module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 7

Go to Step 6

Replace the affected module. Refer to Control Module References in Body Control System.

Did you complete the replacement?

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Go to Step 7

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2