A/C System Control and Regulation Components Outside Passenger Compartment

A/C System Control and Regulation Components Outside Passenger Compartment

• Vehicles with automatically regulated A/C system: Climatronic Control Module (J255) evaluates the signals from various components and actuates the compressor via the A/C Compressor Regulator Valve (N280).

• Vehicles with manual climate control system: the A/C control module (J301) evaluates the signals from various components and actuates the A/C compressor via the A/C compressor regulator valve.

• If there is a malfunction in the system, first check DTC memory of the Climatronic control module / A/C Control Module using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding."

• If no fault is displayed, then read the measured value block for the Climatronic control module / the A/C control module and test the component using the control diagnosis function of the Vehicle diagnosis, testing and information system (VAS5051B) under "Guided Fault Finding."

• Servicing operations on refrigerant circuit are described in=> [ Refrigerant Circuit Repairs ] Refrigerant Circuit Repairs.

• Perform the following work after completion of repair operations:

- Check DTC memory of Climatronic control module / A/C Control Module and erase any malfunctions displayed.

- Check coding of Climatronic control module.

- If necessary, check adaptation of Climatronic control module.

- Perform basic setting of A/C system (Climatronic control module / A/C Control Module) using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding."

• Components outside passenger compartment, refer to => [ A/C System Control and Regulation Components Outside Passenger Compartment ] A/C System Control and Regulation Components Outside Passenger Compartment.