:  Dec 17, 2007



Overview

For battery condition indicator information, refer to section 414-01 - Battery and Cables section of the workshop manual. For battery charging and testing, refer to the instructions for the equipment in use in your own workshop.

The generator is a 'smart' system, able to allow for temperature variations and optimize battery charging.

For information on the description and operation of the system, refer to section 414-02 - Generator and Regulator section of the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Generator
  • Drive belt
  • Drive belt tensioner
  • Generator pulley
  • Check the security of the generator fittings
  • Generator
  • Battery
  • Starter motor
  • Harnesses and connectors
  • Fuses Battery junction box (BJB) - fuse 20E Starter motor megafuse
  • Charge warning lamp function
  • Controller area network (CAN) circuits
  • Engine control module (ECM)

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

Symptom chart

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.

DTC index

:
  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).

:
  For a full list of ECM DTCs, refer to section 303-14 - Electronic Engine Controls section of the workshop manual.

DTC Description Possible causes Action
P062200 Generator Field Terminal Circuit
  • Generator circuit fault
  • Generator failure
Refer to the electrical guides and check the generator circuit. Repair/renew as necessary. Refer to the relevant workshop manual section.
P062500 Generator Field Terminal Circuit Low
  • Voltage sense circuit high resistance
  • Generator B+ circuit high resistance/intermittent
  • Generator monitor circuit short circuit to ground
Check the main charging circuit fuse. Check the charging voltage. Check the charging system circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new generator. Refer to the relevant workshop manual section. Clear the DTCs and test for normal operation.
P062600 Generator Field Terminal Circuit High
  • Generator connector loose/not connected
  • Generator monitor circuit short circuit to power
  • Generator monitor circuit high resistance
Check the charging voltage. Check the charging system circuits. Refer to the electrical guides. If no fault is found in the circuits, install a new generator. Refer to the relevant workshop manual section. Clear the DTCs and test for normal operation.
P065B00 Generator Control Circuit Range/Performance
  • Generator control circuit short circuit to ground
  • Generator control circuit short circuit to power
  • Generator control circuit high resistance
Check the generator and circuits. Refer to the electrical guides. Repair/renew as necessary. Clear the DTCs and test for normal operation.