GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Charging System Check?

--

Go to Step 2

Go to Charging System Check

2

Using the scan tool, inspect for any DTCs.

Are any DTCs present?

--

Go to the Appropriate DTC

Go to Step 3

3

  1. Using the scan tool, perform the IPC Indicator Bulb Check.
  2. Turn the indicator bulbs ON and OFF.

Do all of the indicator bulbs turn ON and OFF properly?

--

Go to Step 4

Go to Instrument Cluster System Check in Instrument Panel, Gauges and Console

4

Disconnect the generator connector.

Is the battery indicator still ON?

--

Go to Step 5

Go to Step 8

5

  1. Perform the appropriate procedure:
  2. • Disconnect connector C1 from the PCM.
    • Disconnect connector C3 from the VCM.
  3. Disconnect the connector from the generator.
  4. Using a J 39200 digital multimeter (DMM), test for continuity from pin B to ground.

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Repair the short to ground.

Is the repair complete?

--

Go to Charging System Check

--

7

Using the J 39200 DMM, measure the voltage at the battery stud on the generator.

Is the voltage within the specified range?

9-16 V

Go to Step 8

Go to Step 9

8

Repair or replace the generator.

Is the repair complete?

--

Go to Charging System Check

--

9

Repair the open in CKT 2 (RED).

Is the repair complete?

--

Go to Charging System Check

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