4WD Control Module Diagnostic Trouble Code (DTC) Index
WARNING: This page is about a different car, the 2004 Lincoln Navigator and 2004 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
4WD CONTROL MODULE DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| B1317 | Battery Voltage High | 4WD control module | CHECK the battery and charging system. REFER to GENERATORS & REGULATORS . |
| B1318 | Battery Voltage Low | 4WD control module | CHECK the battery and charging system, REFER to GENERATORS & REGULATORS . |
| B1342 | ECU is Defective | 4WD control module | CLEAR the DTCs. REPEAT the 4WD control module self-test. If DTC B1342 is retrieved, INSTALL a new 4WD control module. REFER to FOUR-WHEEL DRIVE (4WD) CONTROL MODULE . CLEAR the DTCs. REPEAT the self-test. |
| B2105 | Throttle Position Input Out | 4WD | Go To PINPOINT TEST B: THE VEHICLE DOES NOT OPERATE CORRECTLY IN A4WD AND 4WD HIGH MODES . |
| - | Of Range Low | Control module | - |
| B2106 | Throttle Position Input Out of Range High | 4WD control module | Go To PINPOINT TEST B: THE VEHICLE DOES NOT OPERATE CORRECTLY IN A4WD AND 4WD HIGH MODES . |
| C1728 | Transfer Case Unable to Transition Between 2H and 4H. | 4WD control module | Go To PINPOINT TEST C: NO COMMUNICATION WITH THE FOUR-WHEEL DRIVE (4WD) CONTROL MODULE . |
| C1729 | Transfer Case Unable to Transition Between 4WD HIGH and 4WD LOW | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| C1979 | IWE Solenoid Circuit Failure | 4WD control module | Go To PINPOINT TEST F: DTCS C1979/C1980-IWE SOLENOID CIRCUIT FAILURE/IWE SOLENOID SHORT TO BATTERY . |
| C1980 | IWE Solenoid Short to Battery | 4WD control module | Go To PINPOINT TEST F: DTCS C1979/C1980-IWE SOLENOID CIRCUIT FAILURE/IWE SOLENOID SHORT TO BATTERY . |
| P1812 | Transmission 4-Wheel Drive Mode Select Circuit Failure | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1815 | Transmission 4-Wheel Drive Mode Select Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST A: ELECTRONIC SHIFT FUNCTIONAL TEST . |
| P1824 | Transmission 4-Wheel Drive Clutch Relay Circuit Failure | 4WD control module | Go To PINPOINT TEST A: ELECTRONIC SHIFT FUNCTIONAL TEST . |
| P1826 | Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Battery | 4WD control module | Go To PINPOINT TEST A: ELECTRONIC SHIFT FUNCTIONAL TEST . |
| P1827 | Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST A: ELECTRONIC SHIFT FUNCTIONAL TEST . |
| P1849 | Transmission Transfer Case Contact Plate A Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1853 | Transmission Transfer Case Contact Plate B Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1857 | Transmission Transfer Case Contact Plate C Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1861 | Transmission Transfer Case Contact Plate D Short Circuit to Ground | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1867 | Transmission Transfer Case Contact Plate General Circuit Failure | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| P1891 | Transmission Transfer Case Contact Plate Ground Return Open Circuit | 4WD control module | Go To PINPOINT TEST D: THE VEHICLE DOES NOT SHIFT BETWEEN AUTO/4WD HIGH AND 4WD LOW MODES CORRECTLY . |
| U1900 | CAN Communication BUS Fault | 4WD control module | Refer to MODULE COMMUNICATIONS NETWORK . |
| U1950 | UBP Communication BUS Fault | 4WD control module | Refer to MODULE COMMUNICATIONS NETWORK . |
| U2023 | External Node Fault | 4WD control module | Refer to MODULE COMMUNICATIONS NETWORK . |
| U2306 | Invalid UBP Data From Instrument Cluster (Node 60) | 4WD control module | Refer to MODULE COMMUNICATIONS NETWORK . |
| U2226 | Invalid UBP Data From PCM (Node 10) | 4WD control module | Refer to MODULE COMMUNICATIONS NETWORK . |
| - | For All Other DTCs | 4WD control module | REFER to MULTIFUNCTION ELECTRONIC MODULE . |