Four Wheel Drive 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	Blown fuse (B+) Intermittent open on power circuit 4X4 control module electrical connector(s)	4X4 Control Module	CHECK smart junction box (SJB) fuses 11 (10A) and 35 (10A). If the fuses are OK, go to Pinpoint Test B .
B1342	ECU is Defective	Microprocessor or internal memory fault	4X4 Control Module	CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new 4X4 control module. REFER to 4X4 Control Module .
P1635	Tire/Axle Out of Acceptable Range	Incorrect size tire installed on vehicle Flat or underinflated tire	4X4 Control Module	Go to Pinpoint Test H .
P1824	4WD Clutch Relay Circuit Failure	Short to ground on active torque coupling high circuit 4X4 control module failure	4X4 Control Module	CHECK SJB fuse 35 (10A). If the fuse is OK, go to Pinpoint Test F .
P1825	4WD Clutch Relay Open Circuit	4X4 control module harness connector Open in active torque coupling low circuit Open in active torque coupling high circuit Short to ground on active torque coupling low circuit Short to ground on active torque coupling high circuit Open coil inside active torque coupling Short to voltage in active torque coupling low circuit Internal 4X4 control module power relay failure 4X4 control module failure	4X4 Control Module	CHECK SJB fuse 20 11 (10A) and 35 (10A). If the fuses are OK, go to Pinpoint Test F .
U0100	Lost Communication with PCM	High-speed controller area network (HS-CAN) bus fault No data received by 4X4 control module from PCM	4X4 Control Module	Go to Pinpoint Test E .
U0121	Lost Communication with ABS	HS-CAN bus fault No data received by 4X4 control module from ABS	4X4 Control Module	Go to Pinpoint Test E .
U0155	Lost Communication with Instrument Cluster (IC)	HS-CAN bus fault No data received from the IC by the 4X4 control module	4X4 Control Module	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the lost communication with HS-CAN communication network.
U0401	Invalid Data Received From PCM	Invalid data received from PCM Data out of range	4X4 Control Module	Go to Pinpoint Test C .
U0415	Invalid Data Received From ABS	Invalid data received from ABS module Data out of range	4X4 Control Module	Go to Pinpoint Test D .
U2050	No Application Present	Application software is not present Application software update failed 4X4 control module failed	4X4 Control Module	INSTALL a new 4X4 control module. REFER to 4X4 Control Module .
U2051	One or More Calibration Files Missing/Corrupt	Calibration software is not present Calibration software update failed 4X4 control module failure	4X4 Control Module	INSTALL a new 4X4 control module. REFER to 4X4 Control Module .