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 Circuitry Powertrain control module (PCM)	Go To PINPOINT TEST B .
The charging system overcharges (battery voltage is greater than 15.5 volts)	Circuitry Battery ground connections Generator	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) Circuitry	Go To PINPOINT TEST D .
The charging system warning indicator is off with the ignition switch in the RUN position and the engine off	Generator C102a unplugged Generator Instrument cluster Powertrain control module (PCM)	Go To PINPOINT TEST E .
The charging system warning indicator flickers or is intermittent	Generator C102a unplugged Circuitry Instrument cluster Generator	Go To PINPOINT TEST F .
The generator is noisy	Drive belt Loose bolts or brackets Generator or pulley	Go To PINPOINT TEST G .
Radio interference	Generator In-vehicle entertainment system	Go To PINPOINT TEST H .