DTC C1A27-13: Compressor Circuit - Circuit open: Action

Refer to the electrical circuit diagrams and check the air suspension air supply unit motor power and ground circuits for open circuit, high resistance. Repair circuit as required, clear the DTC and retest
Refer to the electrical circuit diagrams and check the integrity of the feedback protection fuse and associated wiring in the rear junction box. Repair or replace as required, clear the DTCs and retest
Refer to the electrical circuit diagrams and check the integrity of the air suspension air supply unit isolation relay and associated wiring in the rear junction box. Repair or replace as required, clear the DTCs and retest