Four-Wheel Drive (4WD) Control Module Diagnostic Trouble Code (DTC) Index

WARNING: This page is about a different variant/trim than selected.

DTC CHART

DTC	Description	Possible Causes	Source	Action
B1317	Battery Voltage High	Concern with voltage regulator on generator	4WD Control Module	GO to PINPOINT TEST C .
B1318	Battery Voltage Low	Blown fuse (B+) Intermittent open on power circuit Relay failure inside module	4WD Control Module	GO to PINPOINT TEST C .
B1342	ECU is Defective	Microprocessor or internal memory fault	4WD Control Module	CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new 4WD control module. REFER to FOUR-WHEEL DRIVE (4WD) CONTROL MODULE .
P1635	Tire/Axle Out of Acceptable Range	Wrong size tire installed on vehicle Wheel speed sensor failure Flat or under inflated tire	4WD Control Module	GO to PINPOINT TEST J .
P1824	4WD Clutch Relay Circuit Failure	Short to ground on active torque coupling high circuit Electronic control unit (ECU) failure	4WD Control Module	CHECK SJB fuse 18 (10A). If the fuse is good, GO to PINPOINT TEST G .
P1825	4WD Clutch Relay Open Circuit	Short to ground on active torque coupling high circuit Short to ground on active torque coupling low circuit Open coil inside active torque coupling Open in active torque coupling low circuit Short to voltage in active torque coupling low circuit ECU failure	4WD Control Module	CHECK SJB fuse 18 (10A). If the fuse is good, GO to PINPOINT TEST G .
U0100	Lost Communication with PCM	Controller area network (CAN) bus fault No data received by 4WD control module from powertrain control module (PCM)	4WD Control Module	GO to PINPOINT TEST F .
U0121	Lost Communication with Anti-lock Brake System (ABS)	CAN bus fault No data received by 4WD control module from ABS	4WD Control Module	GO to PINPOINT TEST F .
U0401	Invalid Data Received From PCM	Invalid data received from PCM Data out of range	4WD Control Module	GO to PINPOINT TEST D .
U0415	Invalid Data Received From ABS	Invalid data received from ABS module Data out of range	4WD Control Module	GO to PINPOINT TEST E .
U1900	CAN Communication Bus Fault	CAN bus fault	4WD Control Module	GO to PINPOINT TEST F .