2007 Ford Expedition RWDFACTORY OEM SERVICE PROCEDURE

4X4 Control Module DTCS

4X4 CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Action
B1317 Battery Voltage High CHECK the battery and charging system for faults. REFER to CHARGING SYSTEM - GENERAL INFORMATION article. CLEAR the DTC. REPEAT the self-test.
B1318 Battery Voltage Low CHECK the battery and charging system for faults. REFER to CHARGING SYSTEM - GENERAL INFORMATION article. CLEAR the DTC. REPEAT the self-test.
B1342 ECU is Defective CLEAR the DTC. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a 4X4 control module. REFER to4X4 Control Module . REPEAT the self-test.
B1555 Ignition Run/Start Circuit Failure The ignition switch must be in the RUN position before carrying out the self test. If this DTC is retrieved and the ignition was in run before the self test was initiated, CHECK SJB mini fuse 35 (10A). INSTALL a new fuse as necessary. CLEAR the DTC. REPEAT the self test. If the fuse is okay, CHECK 4X4 control module C281a-8, circuit CBP35 (YE/GN) for an open. REPAIR as necessary. CLEAR the DTC. REPEAT the self test.
C1979 IWE Solenoid Circuit Failure Go to Pinpoint Test A .
C1980 IWE Solenoid Circuit Short to Battery Go to Pinpoint Test A .
P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure Go to Pinpoint Test A .
P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground Go to Pinpoint Test B .
P1824 Transmission 4-Wheel Drive Clutch Relay Circuit Failure Go to Pinpoint Test C .
P1825 Transmission 4-Wheel Drive Clutch Relay Open Circuit Go to Pinpoint Test C .
P1826 Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Battery Go to Pinpoint Test C .
P1827 Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Ground Go to Pinpoint Test C .
P183B 4-Wheel Drive Clutch Coil Return Circuit Open Go to Pinpoint Test C .
U0100 Lost Communication With PCM DIAGNOSE the module communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U0101 Lost Communication With Transaxle Control Module DIAGNOSE the module communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U0121 Lost Communication With ABS Module DIAGNOSE the module communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U2023 External Node Fault DIAGNOSE the module communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U2050 Application Not Programmed Method 3 programming fault. REFER to MODULE COMMUNICATIONS NETWORK article for 4X4 control module (PCM) programming information.
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