DTC C1A27-11: Compressor Circuit - Circuit short to ground: Action
- Refer to the electrical circuit diagrams and check the air suspension air supply unit isolation relay circuits for short circuit to ground. Repair circuit(s) as required, clear the DTCs and retest
- Refer to the electrical circuit diagrams and check the air suspension air supply unit isolation relay high current terminals for short circuit to one another. Repair circuit(s) as required, clear the DTCs and retest
- If the fault persists, install a new air suspension air supply unit isolation relay. Clear the DTCs and retest