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light does not come on
•
Generator fault •
CAN circuit fault •
ECM fault
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 light stays on/battery discharges
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Accessory drive •
Generator pulley •
Generator fault •
Battery cable fault •
CAN circuit fault •
ECM fault
Check fuse 30 of the rear power distribution box. GO to Pinpoint Test G552802p4. Check the battery and generator cables. GO to Pinpoint Test G552802p3. 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 light intermittent
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Accessory drive •
Battery cable fault •
Generator wiring •
Generator fault •
CAN circuit fault
Check the accessory drive belt condition and tension (see visual inspection chart). Check the battery and generator cables. GO to Pinpoint Test G552802p3. 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 light on until disconnected.
Battery discharges without the charge warning light staying on
•
Battery fault •
Battery quiescent •
Intermittent
Check the battery condition, check for battery drain. Refer to the battery care manual. 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. GO to Pinpoint Test G552802p1.
Noise (mechanical) •
Accessory drive •
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. For additional information. Accessory Drive Belt - 2.7L V6 - TdV6 (12.10.40)
DTC index NOTE:
Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).
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