Four-Wheel Drive Systems DTCS
4X4 MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| C1728 | Transfer Case Unable to Transition Between 2WD HIGH and 4WD HIGH | 4x4 Module (PCM) | GO to PINPOINT TEST C . |
| C1729 | Transfer Case Unable to Transition Between 4WD HIGH and 4WD LOW | 4x4 Module (PCM) | GO to PINPOINT TEST D . |
| C1979 | IWE Solenoid Circuit Failure | 4x4 Module (PCM) | GO to PINPOINT TEST B . |
| C1980 | IWE Solenoid Circuit Short to Battery | 4x4 Module (PCM) | Go to PINPOINT TEST B . |
| P1812 | Transmission 4-Wheel Drive Mode Select Circuit Failure | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1815 | Transmission 4-Wheel Drive Mode Select Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1820 | Transfer Case Clockwise Shift Relay Coil Circuit Failure | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1822 | Transfer Case Clockwise Shift Relay Coil Short Circuit To Battery | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1824 | Transmission 4-Wheel Drive Clutch Relay Circuit Failure | 4x4 Module (PCM) | GO to PINPOINT TEST E . |
| P1826 | Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Battery | 4x4 Module (PCM) | Go to PINPOINT TEST E . |
| P1827 | Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST E . |
| P1828 | Transfer Case Counterclockwise Shift Relay Coil Circuit Failure | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1830 | Transfer Case Counterclockwise Shift Relay Coil Short Circuit To Battery | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1849 | Transmission Transfer Case Contact Plate A Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1853 | Transmission Transfer Case Contact Plate B Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1857 | Transmission Transfer Case Contact Plate C Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1861 | Transmission Transfer Case Contact Plate D Short Circuit to Ground | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1867 | Transmission Transfer Case Contact Plate General Circuit Failure | 4x4 Module (PCM) | Go to PINPOINT TEST C . |
| P1891 | Transmission Transfer Case Contact Plate Ground Return Open Circuit | 4x4 Module (PCM) | Go to PINPOINT TEST C . |