Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The battery is discharged or battery voltage is low	Circuitry High key-off current drain(s) Battery Generator	GO to PINPOINT TEST A .
The charging system warning indicator is on with the engine running (the charging system voltage does not increase)	Generator Fusible links Circuitry Powertrain control module (PCM)	GO to PINPOINT TEST B .
The charging system overcharges (battery voltage is greater than 15.5 volts)	Generator Circuitry Powertrain control module (PCM)	GO to PINPOINT TEST C .
The charging system warning indicator is on with the engine running and the battery increases voltage	Generator Instrument cluster Powertrain control module (PCM)	GO to PINPOINT TEST D .
The charging system warning indicator is off with the ignition switch in the RUN position and the engine off	Instrument cluster Powertrain control module (PCM)	GO to PINPOINT TEST E .
The charging system warning indicator flickers or is intermittent	Instrument cluster	INSTALL a new instrument cluster. Refer to INSTRUMENT CLUSTER .
The generator is noisy	Loose bolts/brackets Drive belt Generator or pulley (conventional) One-way-clutch (OWC) pulley	GO to PINPOINT TEST F .
Radio interference	Generator. Wiring/routing In-vehicle entertainment system.	GO to PINPOINT TEST G .