Automatic Climate Control components in engine compartment, servicing: Notes
- After performing repairs, always check and erase DTC memory, perform basic setting and also check coding of A/C control head -E87-. See VAG 1551 (VAG 1552) SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS .
- A/C system cooling performance. See A/C REFRIGERANT SYSTEM, TESTING .
- A/C system servicing. See A/C SYSTEM REFRIGERANT SYSTEM, SERVICING .
- All the components identified with an asterisk (*) are actuated during output Diagnostic Test Mode (DTM). See OUTPUT DIAGNOSTIC TEST MODE (DTM) (FUNCTION 03) .
- Different codes on the A/C control head -E87- for Nippondenso compressor without speed sensor -G111-. See CODE CONTROL MODULE (FUNCTION 07) .
- An electrical test is possible at all the components identified with two asterisks (**). See AUTOMATIC CLIMATE CONTROL SYSTEM, ELECTRICAL .
- Outside air temperature sensor -G17-**
- Removing and installing: to remove bumper, unplug connector and unclip sensor from mount in the air guide
- A/C refrigerant pressure switches -F23-, -F118- and -F129-**
- A/C pressure switch - F129-, function, removing and installing. See A/C PRESSURE SWITCH -F129-, FUNCTIONS .
- A/C high pressure switch -F23- and -F118- function, removing and installing. See A/C refrigerant high pressure switches -F23- and -F118- .
NOTE:- A/C refrigerant high pressure switch -F23- and A/C refrigerant high pressure switch -F118- are installed on vehicles with an A/C control headup to Part No. index letter "H."
- On vehicles with an A/C control head beginning at Part No. index letter "J," A/C pressure switch -F129- is installed (introduction of sensor for air quality -G238-).
- A/C clutch -N25-*
- Servicing. See A/C CLUTCH, SERVICING .
- A/C compressor speed sensor -G111-**
- Not applicable for Nippondenso compressor
- Compressor (Nippondenso)
- Removing and installing compressor from mounting bracket. See A/C COMPRESSOR FROM MOUNTING BRACKET, REMOVING AND INSTALLING .
- Removing and installing. See A/C COMPRESSOR, REMOVING AND INSTALLING .
CAUTION: Discharge A/C refrigerant system before removing A/C compressor.NOTE: Remove ribbed V-belt. - Accumulator
- Removing and installing. See ACCUMULATOR, REMOVING AND INSTALLING .
CAUTION: Discharge A/C refrigerant system before removing accumulator. - A/C refrigerant low pressure switch -F73-**
- Function, removing and installing. See A/C REFRIGERANT LOW PRESSURE SWITCH -F73- .
- Deleted with introduction of A/C pressure switch - F129-. See A/C pressure switch -F129-, functions .
- For vehicles without A/C refrigerant low pressure switch -F73- a cap with seal must be screwed onto the connector for this switch
- Forced air ventilation
- The sealing lips of the ventilation frame must be free of obstructions and must close automatically.
NOTE: To ensure proper ventilation of the passenger compartment, the position of the air guides formed by luggage compartment trim (to the parcel shelf) must not be altered. - Dust and pollen filter
- Removing and installing. See DUST AND POLLEN FILTERS, REMOVING AND INSTALLING .
- Observe notes regarding revised version for vehicles with sensor for air quality -G238-. See DUST AND POLLEN FILTERS, REMOVING AND INSTALLING .
NOTE: The dust and pollen filters must be replaced at regular intervals. - Pump valve unit
- Removing and installing. See PUMP VALVE UNIT, REMOVING AND INSTALLING .
- Replacing. See PUMP VALVE UNIT, REPLACING .
NOTE: The pump valve unit consists of the left and right heat regulating valves -N175- and -N176- as well as coolant pump -V50-. - Fresh air intake duct temperature sensor -G89-**
- Removing and installing. See FRESH AIR INTAKE DUCT TEMPERATURE SENSOR -G89-, REMOVING AND INSTALLING .
- Air flow flap motor -V71-*
- With back pressure flap motor position sensor - G113-
- Removing and installing. See AIR FLOW FLAP MOTOR -V71-, REMOVING AND INSTALLING .
- Evaporator
- Removing and installing. See A/C EVAPORATOR, REMOVING AND INSTALLING .
CAUTION: Discharge A/C Refrigerant System Before Removing Evaporator. - Opening for recirculating air mode
- Recirculation flap motor -V113-*
- With recirculation flap motor position sensor - G143-
- Removing and installing. See RECIRCULATION FLAP MOTOR -V113-, REMOVING AND INSTALLING .
- Fresh air blower - V2-**
- Removing and installing. See FRESH AIR BLOWER -V2-, REMOVING AND INSTALLING
- Control unit for blower - J126-**
- Removing and installing. See CONTROL MODULE FOR FRESH AIR BLOWER -J126-, REMOVING AND INSTALLING .
- Condenser
- Removing and installing. See A/C CONDENSER, REMOVING AND INSTALLING .
CAUTION: Discharge A/C refrigerant system before removing condenser. - Service valve
- For measuring, draining and filling
NOTE: A cap with seal must be installed. - Sensor for air quality - G238-
- Phased into production in m.y. 1998
- For vehicles with sensor for air quality -G238- only one compatible version of A/C control head -E87- is or should be installed beginning at Part No. index letter "J"
- Function: See Sensor for air quality -G238-, function .
- Checking: See SENSOR FOR AIR QUALITY -G238-, CHECKING .
- Removing and installing. See SENSOR FOR AIR QUALITY -G238-, REMOVING AND INSTALLING .
- Fresh air intake duct temperature sensor -G89-**
- Removing and installing. See FRESH AIR INTAKE DUCT TEMPERATURE SENSOR -G89-, REMOVING AND INSTALLING .
- Component location for vehicles equipped with sensor for air quality - G238-