P1244

B : GENERATOR OVERCHARGING (P1244). VEHICLES FITTED WITH 2.5L OR 3.0L ENGINE.

G157288t5 : CHECK THE VOLTAGE REGULATOR REQUEST SIGNAL WIRE FOR A SHORT TO BATTERY POSITIVE
1. Disconnect the ECM electrical connector PI1 and the generator connector PI47.
2. Measure the resistance between electrical connector PI47 pin 1 (YR) and the generator battery positive cable.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR short to the generator battery positive cable. CLEAR the DTC. TEST the system for normal operation.

-> No

G157288t6 : CHECK THE VOLTAGE REGULATOR REQUEST SIGNAL WIRE FOR OPEN CIRCUIT
1. Measure the resistance between electrical PI1 pin 53 (YR) and PI47 pin 1 (YR).

- Is the resistance less than 5 ohms?

-> Yes
INSTALL a new generator. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM.

-> No
REPAIR the circuit from the ECM to the generator. CLEAR the DTC. TEST the system for normal operation.