Symptom |
Possible cause |
Action |
Charge warning lamp does not come on |
- Bulb/Circuit fault
- Generator fault
- CAN circuit fault
- ECM fault
|
Check the warning lamp function with the ignition on and the
engine off. Replace bulbs or repair the circuit(s) as necessary. Check for
DTCs indicating a generator, CAN or ECM fault. |
Charge warning lamp stays on/battery discharges |
- Accessory drive belt broken
- Generator pulley slipping on shaft
- Generator fault
- Battery cable fault
- CAN circuit fault
- ECM fault
|
Check the battery and generator cables. Refer to the
electrical guides. Check for DTCs indicating a generator fault. Check the
accessory drive belt condition and tension (see visual inspection chart).
Check that the pulley does not rotate independently of the generator.
Check for DTCs indicating a CAN or ECM fault. |
Charge warning lamp intermittent |
- Accessory drive belt slipping
- Battery cable fault
- Generator wiring fault
- Generator fault
- CAN circuit fault
|
Check the accessory drive belt condition and tension (see
visual inspection chart). Check the battery and generator cables. Refer to
the electrical guides. Check for DTCs indicating a generator or CAN
circuit fault. Note that the use of a power pack or boost charger may
bring the warning lamp on until disconnected. |
Battery discharges without the charge warning lamp staying
on |
- Battery fault
- Battery quiescent drain
- Intermittent generator fault
|
Check the battery condition, check for battery quiescent
drain. Check for DTCs indicating a generator fault. It is possible for the
altcom circuit to short circuit to ground without setting a DTC. If no
other reason for discharge can be found, check this circuit. Refer to the
electrical guides. |
Noise (mechanical) |
- Accessory drive belt slipping
- Generator fault
|
Check the accessory drive belt condition and tension (see
visual inspection chart). Disconnect the accessory drive belt and check
that the generator rotates freely. |