1. Disconnect the generator connector.
2. Turn the ignition switch to RUN with the engine OFF.
3. Connect a voltmeter set at DC scale between the generator connector terminal L (V8 VIN G) or terminal B (V6 VIN K) and ground.
4. (V6 VIN K) Using a scan tool, command the powertrain control module (PCM) to turn the generator on.

Is the reading greater than the specified value?

0 V

Go to Step 2

Go to Step 3

Move the voltmeter lead from terminal L (V8 VIN G) or terminal B (V6 VIN K) to the generator BATT terminal.

Is the reading greater than specified value?

0 V

Go to Step 4

Go to Step 5

1. (V8 VIN G) Check for an open or poor connection in circuit 225 between the generator terminal L and the instrument cluster terminal A14.
2. Check for an open fuse 9 or circuit 39 to the instrument cluster. (If fuse 9 or circuit 39 is open, the instrument cluster will not operate correctly.)
3. If OK, replace the instrument cluster. Refer to Instrument Cluster Replacement .
4. (V6 VIN K) Check for an open or poor connection in circuit 25 between the generator connector terminal B and the powertrain control module (PCM). If OK refer to Powertrain On Board Diagnostic (OBD) System Check .

Is the repair complete?

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System OK

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1. Connect the generator connector.
2. Run the engine at fast idle with all of the accessories OFF.
3. Connect a voltmeter set at the DC scale across the battery terminals.

Is the reading within the specified value?

13.5-15.5 V

Go to Step 6

Go to Step 7

Repair open in circuit 1 between the generator BATT terminal and the battery.

Is the repair complete?

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System OK

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1. Load test the generator.
2. Replace the generator if necessary. Refer to Generator Replacement .
3. If the generator is OK, perform the Parasitic Load Test. Refer to Battery Electrical Drain/Parasitic Load Test .

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Repair or replace the generator. Refer to Generator Replacement

Is the repair complete?

--

System OK

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