A/C Components Outside Passenger Compartment

A/C Components Outside Passenger Compartment

• If there is a malfunction in the system, first check DTC memory of the Climatronic Control Module (J255) (and of Rear A/C Display Control Head (E265) ) using Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding".

• If no fault is displayed, check the measured value block for the Climatronic control module and the rear A/C display control head ) and activate the affected component with the "Output diagnostic test mode" function of the Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding".

• Servicing operations on A/C system that are possible without opening refrigerant circuit, refer to => [ Component Overview ] Component Overview.

• Servicing operations on A/C system that require the refrigerant circuit to be opened, refer to => [ Refrigerant Circuit, Servicing ] Refrigerant Circuit, Servicing.

• Perform the following work after completion of repair operations:

- Check DTC memory of the Climatronic control module (and of rear A/C display control head) and erase any DTCs displayed using the Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

- Check coding of the Climatronic control module using the Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

- If necessary, check adaptation of the Climatronic control module and of rear A/C display control head (not installed in all vehicles) using the Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

- Perform A/C system basic setting using Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

• A/C system components not inside the passenger compartment, refer to => [ A/C System Components Outside Passenger Compartment ] A/C System Components Outside Passenger Compartment.