Air conditioning
Check whether any AC-related fault codes are set in the coordinator.Check whether any AC-related fault codes are set in the engine control unit (EMS).Check that the pressure switch/pressure sensor and its wiring is intact.Check CAN communication to ensure that the ACC control unit, coordinator and engine control unit can communicate with each other.Make sure that the compressor wiring is intact.Check that the AC compressor electromagnetic clutch is intact. Check the belt and coupling coil and check that the rotor and pulley have the correct spacing. Refer to Multi 18-75 for the work method.Check that the condenser is intact.Check that the evaporator temperature sensor and air temperature sensor are correctly installed.Test pressurise the AC system.If no other fault is found, renew the AC compressor.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The air conditioning (AC) is not working efficiently.
Fault on the AC compressor.Fault in wiring or connector for CAN communication or a fault in the unit which controls the AC compressor.The pressure in the AC system is too low or too high. There may be a leak in the system.