Diagnostics of Engine Electrical System Faults

Starting system faults are described above in the subsection Engine General Fault Diagnostics.

Battery does not hold charge
1 Alternator drive belt worn or tension adjustment incorrect (refer to Maintenance and Adjustment).
2 Electrolyte level in battery cells low (refer to Maintenance and Adjustment).
3 Battery terminals corroded or battery cable connectors loose (refer to Maintenance and Adjustment).
4 Charging circuit wiring broken or otherwise damaged, or circuit connector terminals loose (refer to Engine Electrical System).
5 Internal battery fault (refer to Engine Electrical System).
6 Alternator does not produce required charging current (refer to Engine Electrical System).
7 Alternator voltage regulator faulty (refer to Engine Electrical System).
8 Battery discharging due to short circuit in wiring (refer to Engine Electrical System and Body Electrical System).

Ignition/charge warning lamp remains on with engine running
1 Internal alternator or voltage regulator fault (refer to Engine Electrical System).
2 Alternator drive belt worn or broken, or tension adjustment incorrect (refer to Maintenance and Adjustment).
3 Alternator brushes worn, sticking or contaminated (refer to Engine Electrical System).
4 Alternator brush springs weak or broken (refer to Engine Electrical System).
5 Charging circuit wiring broken, or circuit connector terminals loose (refer to Engine Electrical System).

Ignition/charge warning lamp does not light when engine is started
1 Bulb filament burned out (refer to Body Electrical System).
2 Instrument cluster printed circuit board or bulb holder faulty (refer to Body Electrical System).
3 Alternator faulty (refer to Engine Electrical System).