Four Wheel Drive (4WD) Systems DTCS

4X4 CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC	Description	Possible Causes	Source	Perform Test
B1317	Battery Voltage High	Generator	4X4 Control Module	Go to Pinpoint Test B .
B1318	Battery Voltage Low	Open fuse (B+) Intermittent open on power circuit 4X4 control module connector	4X4 Control Module	Go to Pinpoint Test B .
P1635	Tire/Axle Out of Acceptable Range	Incorrect size tire installed on vehicle Wheel speed sensor failure Flat or under-inflated tire	4X4 Control Module	Go to Pinpoint Test F .
P1824	Four-Wheel Drive (4WD) Clutch Relay Circuit Failure	Short to ground on Active Torque Coupling (ATC) solenoid (part of rear axle) high circuit 4X4 control module failure	4X4 Control Module	Go to Pinpoint Test D .
P1825	4WD Clutch Relay Open Circuit	4X4 control module harness connector Open in ATC solenoid (part of rear axle) low circuit Open in ATC solenoid high circuit Short to ground on ATC solenoid low circuit Short to ground on ATC solenoid high circuit Open coil inside ATC solenoid Short to voltage in ATC solenoid low circuit 4X4 control module failure	4X4 Control Module	Go to Pinpoint Test D .
U0415	Invalid Data Received From Anti-lock Brake System (ABS) Control Module	Invalid data received from ABS module Data out of range	4X4 Control Module	Go to Pinpoint Test C .