Pinpoint Test N: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position and The Engine Off

Pinpoint Test






Pinpoint Test N: The Charging System Warning Indicator is Off With the Ignition Switch in the Run Position and the Engine Off

Refer to Wiring Diagram Set 12, Charging System for schematic and connector information Diagrams By Number.

Normal Operation

Under normal operation, the charging system warning indicator is on with the key in the ON position and the engine off.

This pinpoint test is intended to diagnose the following:
- Upper generator disconnected
- Lower generator disconnected
- I circuit open
- Charging system warning indicator circuit open
- Upper generator
- Lower generator
- Instrument Cluster (IC)
- PCM



PINPOINT TEST N: THE CHARGING SYSTEM WARNING INDICATOR IS OFF WITH THE IGNITION SWITCH IN THE RUN POSITION AND THE ENGINE OFF

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N1 CHECK THE DTCs IN THE PCM


- Ignition OFF.
- Connect the scan tool.
- Ignition ON.
- With the Key ON Engine OFF (KOEO), check the PCM for DTCs with the scan tool.
- Are generator DTCs present?

Yes
GO to the appropriate pinpoint test listed in the Symptom Chart.

No
GO to N2.

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N2 CHECK THE CHARGING SYSTEM WARNING INDICATOR OPERATION


- Ignition OFF.
- Disconnect the scan tool.
- Disconnect: PCM C1381B.
- Ignition ON.
- With the KOEO, connect a fused jumper wire between the PCM C1381B-30, circuit CDC09 (YE), harness side and ground.




- Does the charging system warning indicator illuminate?

Yes
GO to N3.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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N3 CHECK FOR CORRECT PCM OPERATION


- Disconnect all of the PCM connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all of the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems. REPEAT the self-test. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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