Suspension (Air) DTCS
SUSPENSION (AIR) 4-WHEEL AIR SUSPENSION (4WAS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTCs | Description | Source | Perform Test |
|---|---|---|---|
| B1317 | Battery voltage high | 4WAS module | Go To PINPOINT TEST C . |
| B1318 | Battery voltage low | 4WAS module | Go To PINPOINT TEST C . |
| B1342 | ECU is defective | 4WAS module | INSTALL a new 4WAS module. REFER to AIR SUSPENSION CONTROL MODULE . SET the ride height. REFER to RIDE HEIGHT ADJUSTMENTS . CARRY OUT the pneumatic test. TEST the system for normal operation. |
| B1566 | Door circuit failure | 4WAS module | REFER to SYMPTOM CHART . |
| B2477 | VAPS II steering assist curve not complete | 4WAS module | REFER to STEERING SYSTEM-GENERAL INFORMATION . |
| C1445 | Vehicle speed signal circuit failure | 4WAS module | GO to SYMPTOM CHART . |
| C1724 | Air suspension height sensor power circuit failure | 4WAS module | Go To PINPOINT TEST D . |
| C1725 | Air suspension front pneumatic failure | 4WAS module | Go To PINPOINT TEST E . |
| C1726 | Air suspension rear pneumatic failure | 4WAS module | Go To PINPOINT TEST E . |
| C1760 | Air suspension rear height sensor signal circuit failure | 4WAS module | Go To PINPOINT TEST F . |
| C1770 | Air suspension vent solenoid output circuit failure | 4WAS module | Go To PINPOINT TEST G . |
| C1790 | Air suspension LR air spring/shock solenoid output circuit failure | 4WAS module | Go To PINPOINT TEST H . |
| C1795 | Air suspension RR air spring/shock solenoid output circuit failure | 4WAS module | Go To PINPOINT TEST H . |
| C1830 | Air suspension compressor relay circuit failure | 4WAS module | Go To PINPOINT TEST I |
| C1840 | Air suspension disable switch circuit failure | 4WAS module | Go To PINPOINT TEST J . |
| C1873 | Air suspension RF air spring solenoid output circuit failure | 4WAS module | Go To PINPOINT TEST H . |
| C1877 | Air suspension LF air spring solenoid output circuit failure | 4WAS module | Go To PINPOINT TEST H . |
| C1881 | Air suspension RF height sensor circuit failure | 4WAS module | Go To PINPOINT TEST F . |
| C1889 | Air suspension LF height sensor circuit failure | 4WAS module | Go To PINPOINT TEST F . |
| C1897 | Steering VAPS circuit loop failure | 4WAS module | REFER to STEERING SYSTEM-GENERAL INFORMATION . |
| U1950 | UBP communication bus fault | 4WAS module | REFER to MODULE COMMUNICATIONS NETWORK . |
| C1964 | Air suspension compressor actual run time exceeded allowed run time | 4WAS module | Allow the air compressor to cool down. CLEAR the DTC. REPEAT the self-test. |
| C1990 | New control module initialization (requires ride height calibration and pneumatic test pass) | 4WAS module | REFER to CLEARING DTC C1990 OR C1991 . |
| C1991 | Plant ride height setting and/or tests incomplete | 4WAS module | REFER to CLEARING DTC C1990 OR C1991 . |
| U2235 | 4x4 mode status invalid | 4x4 control module | REFER to MODULE COMMUNICATIONS NETWORK . |
| U2306 | Transmission PRNDL indicator or vehicle speed signal invalid | Instrument Cluster (IC) | REFER to MODULE COMMUNICATIONS NETWORK . |