Schematic Reference: Starting and Charging Schematics

Connector End View Reference: Engine Electrical Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Start the engine.
2. Turn OFF all accessories.

Does the battery charge indicator remain illuminated?

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Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

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 Signal parameter in the body control module (BCM) data list, engine control module (ECM)/powertrain control module (PCM) data list, and the instrument panel cluster (IPC) data list.
6. Compare the voltages.

Are all of the voltages within the specified range?

0.9-1.1 V

Go to Step 4

Go to Step 5

Are the voltages displayed within the specified range?

11-16 V

Go to Step 5

Go to Charging System Test

Test the battery positive voltage and ground circuits of the affected module for a high resistance or open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

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Go to Step 8

Go to Step 6

Inspect for poor connections at the harness connector of the affected module. Refer to Connector Repairs .

Did you find and correct the condition?

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Go to Step 8

Go to Step 7

Replace the affected module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

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Go to Step 8

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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