A/C Components
A/C Components
• Different versions depending on the version and vehicle equipment (vehicle with a Climatronic Control Module (J255) A./C control head, "Basic" or "Comfort" version, left or right-hand steering, vehicles with or without the Auxiliary Air Heater Heating Element (Z35)).
• Air guide in air conditioner and in vehicle => [ Air Distribution in A/C and Air Intake Units, Block Diagram ] Air Distribution in A/C and Air Intake Units, Block Diagram
• Heating and A/C unit, removing and installing => [ A/C Unit ] A/C Unit
• Various connectors of identical construction are present on wiring harness of heating & A/C unit, apply identifying marks on connectors before disconnecting (risk of interchange).
• Different control motors are installed on the A/C unit and air intake unit, these control motors are distinguished by their electrical values and in their part number index, therefore mark the control motors before removing (risk of interchange).
1 Right Chest Vent Control Motor (V238) ( Comfort Version) or Left Chest Vent Control Motor (V237) (Basic Version)
• The name for this control motor depends on the version of the Climatronic Control Module (J255) A/C control head, it is different in the guided troubleshooting and the wiring diagram of the "Comfort" version and "Basic" version.
• The Right Chest Vent Control Motor Potentiometer (G388) is installed in Right Front Chest Vent Control Motor (V238).
• The Left Chest Vent Control Motor Potentiometer (G387) is installed in Left Front Chest Vent Control Motor (V237).
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- In vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head, left and right chest vent doors are operated by the Left Chest Vent Door Motor (V237) (both left and right doors are connected to each other via a shaft).
• Removing and installing => [ Front Upper Body Outlet Motors ] Front Upper Body Outlet Motors.
2 Defroster Door Motor (V107)
• With Defroster Door Motor Position Sensor (G135)
• Removing and installing => [ Defroster Door Motor ] Defroster Door Motor
3 Right Vent Temperature Sensor (G151)
• Removing and installing => [ Right Vent Temperature Sensor ] Right Vent Temperature Sensor
4 Coolant Pipe
• Supply from the pump/valve unit to the left side of the heat exchanger
• Different versions in vehicles with steering on the left or right.
• There are different versions of the heater core and the associated coolant pipes. In model year 2006, the seal between connections on the heat exchanger and coolant pipes were converted from an axial/radial seal to a radial seal, note the correct assignment => [ A/C Unit Heat Exchanger ] A/C Unit Heat Exchanger.
5 Coolant Pipe
• Supply from the pump/valve unit to the right side of the heat exchanger
• Different versions in vehicles with steering on the left or right.
• There are different versions of the heater core and the associated coolant pipes. In model year 2006, the seal between connections on the heat exchanger and coolant pipes were converted from an axial/radial seal to a radial seal, note the correct assignment => [ A/C Unit Heat Exchanger ] A/C Unit Heat Exchanger.
6 Dust and Pollen Filter
• Follow the replacement intervals => maintenance tables.
• Different versions depending on vehicle equipment and production time frame.
- On vehicles with the Climatronic Control Module (J255) A/C control head "Basic" version without activated charcoal filter element
- On vehicles with the Climatronic Control Module (J255) A/C control head "Comfort" version with activated charcoal filter element. There is also an Air Quality Sensor (G238) installed on these vehicles.
• In model year 2008, vehicles with a "Comfort" A/C system will have a modified dust and pollen filter with an activated charcoal filter element installed as a running change. This filter with an improved interception rate for fine particulates has approximately the same air resistance values as the filter installed prior to the change, and for this reason will be installed in vehicles built up to the change.
• Removing and installing => [ Dust and Pollen Filter ] Dust and Pollen Filter
• Depending on the version, for some countries with high dust levels, a dust filter is installed at the air intake unit instead of intake air grille, which prevents dust and sand from entering the fresh air blower; replace this if necessary together with the dust and pollen filter => [ Fresh Air Intake Grille ] Fresh Air Intake Grille.
7 Evaporator
• May only be removed when refrigerant circuit has been removed; bring vehicle to a workshop that has the necessary tools and in which the work can be performed accordingly by qualified personnel => Refrigerant R134a - Servicing.
• Removing and installing => [ Evaporator ] Service and Repair
• Clean air conditioning system evaporator with Ultrasonic HVAC Cleaning System (VAS 6189) => [ A/C System Evaporator, Cleaning with VAS 6189 ] A/C System Evaporator, Cleaning with VAS 6189
8 Evaporator Vent Temperature Sensor (G263)
• Removing and installing => [ Evaporator Vent Temperature Sensor ] Service and Repair
9 Right Condensate Drain Flange
• Checking, removing and installing the condensate drain hose => [ Condensation Drain Hose ] Condensation Drain Hose
• 1 condensate drain hose each for driver's and front passenger's side.
10 A/C Unit Heat Exchanger
• Removing and installing => [ A/C Unit Heat Exchanger ] A/C Unit Heat Exchanger
• There are different versions of the heater core and the associated coolant pipes. In model year 2006, the seal between connections on the heat exchanger and coolant pipes were converted from an axial/radial seal to a radial seal, note the correct assignment => [ A/C Unit Heat Exchanger ] A/C Unit Heat Exchanger.
11 Auxiliary Heater Heating Element (Z35)
• Not for North American Market.
12 Right Footwell Door Control Motor (V109) (Comfort Version) or Left Footwell Door Control Motor (V108) (Basic Version)
• The name for this control motor depends on the version of the Climatronic Control Module (J255) A/C control head, it is different in the guided troubleshooting and the wiring diagram of the "Comfort" version and "Basic" version.
• Right Footwell Door Motor Position Sensor (G140) is installed in Right Footwell Door Motor (V109).
• Left Footwell Door Motor Position Sensor (G139) is installed in Left Footwell Door Motor (V108).
- In vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head, left and right footwell vent doors are operated by the Left Footwell Vent Door Motor (V108) (both left and right doors are connected to each other via a coupling rod).
• Removing and installing => [ Footwell Door Motors ] Footwell Door Motors
• The Right Footwell Door Control Motor (V109) is only installed in vehicles with the "Comfort" version of the Climatronic Control Module (J255) A/C control head.
- In vehicles with the "Basic" version of the Climatronic Control Module (J255)A/C control head, both doors are operated by the Left Footwell Door Control Motor (V108).
13 Front Cold Air Door Motor (V197)
• With Front Cold Air Door Control Motor Potentiometer (G315)
• Removing and installing => [ Front Cold Air Door Motor ] Front Cold Air Door Motor
14 Control Motor for Rear Vent (V112)
• With Potentiometer in the Rear Vent Control Motor (G141)
• Removing and installing => [ Rear Footwell Vent Motor ] Rear Footwell Vent Motor
15 Climatronic Control Module A/C Control Head Connector
16 Center Outlet Temperature Sensor (G191)
• Removing and installing => [ Center Vent Temperature Sensor ] Center Vent Temperature Sensor
• The Center Outlet Temperature Sensor (G191) is being gradually discontinued as of model year 2006, therefore pay attention to correct assignment of the Climatronic Control Module (J255) A/C control head (different versions).
17 Indirect Ventilation Door Motor (V213)
• With the Potentiometer for the Indirect Ventilation Door Control Motor (G330)
- The Control Motor for the Indirect Ventilation Door (V213) is only installed in vehicles with the "Comfort" version of the Climatronic Control Module (J255) A/C control head. This control motor is not available in vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head (the opening in the A/C unit is sealed and the door is not installed).
• Removing and installing => [ Indirect Ventilation Flap Motor ] Indirect Ventilation Flap Motor
18 Coolant Pipe
• Return from heat exchanger to engine
• There are different versions of the heater core and the associated coolant pipes. In model year 2006, the seal between connections on the heat exchanger and coolant pipes were converted from an axial/radial seal to a radial seal, note the correct assignment => [ A/C Unit Heat Exchanger ] A/C Unit Heat Exchanger.
19 Center Vent Adjustment Motor (V102)
• With Potentiometer in the Central Vent Control Motor (G138)
• Removing and installing => [ Center Vent Adjustment Motor ] Center Vent Adjustment Motor
20 Left Footwell Door Motor (V108)
• With Potentiometer in the Left Footwell Door Control Motor (G139)
• In vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head, there is no control motor at this location. The Left Footwell Door Control Motor (V108) in these vehicles is installed at the A/C unit to the right (the two doors are connected via a coupling rod).
• The Left Footwell Door Control Motor (V108) is installed to the left in vehicles with the "Comfort" version of the Climatronic Control Module (J255) A/C control head, and to the right at the A/C unit in vehicles with the "Basic"version of the Climatronic Control Module (J255) A/C control head.
- In vehicles with the "Basic" version of the Climatronic Control Module (J255)A/C control head, both footwell doors are operated by the Left Footwell Door Control Motor (V108) (installed at the A/C unit to the right).
• Removal and installation for the "Comfort" version => [ Left Footwell Door Motor ] Left Footwell Door Motor
• Removal and installation for the "Basic" version => [ Footwell Door Motors ] Footwell Door Motors
21 Left Condensate Drain Flange
• Checking, removing and installing the condensate drain hose => [ Condensation Drain Hose ] Condensation Drain Hose
• 1 condensate drain hose each for driver's and front passenger's side.
22 Cap
• For the opening to the dust and pollen filter in vehicles with right-hand steering (in these vehicles, the dust and pollen filter is removed to the left).
• Remove and install the dust and pollen filter => [ Dust and Pollen Filter ] Dust and Pollen Filter
23 Refrigerant Lines to Evaporator
• Disconnect and reconnect the refrigerant lines on the evaporator, remove and install the evaporator => [ Evaporator ] Service and Repair
• Refrigerant Line to A/C Unit, Removing and Installing => [ Refrigerant Lines at A/C Unit ] Refrigerant Lines at A/C Unit
24 Left Vent Temperature Sensor (G150)
• Removing and installing => [ Left Vent Temperature Sensor ] Left Vent Temperature Sensor.
25 Left Front Chest Vent Control Motor (V237)
• With Potentiometer for Front Left Chest Vent (G387)
• In vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head, there is no control motor at this location. The Control Motor for the Front Left Chest Vent (V237) in these vehicles is installed at the A/C unit to the right (the two doors are connected via a shaft).
• The Control Motor for the Left Front Chest Vent (V237) is installed to the left in vehicles with the "Comfort" version of the Climatronic Control Module (J255) A/C control head, and to the right at the A/C unit in vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head.
- In vehicles with the "Basic" version of the Climatronic Control Module (J255) A/C control head, left and right chest vent doors are operated by the Left Chest Vent Door Motor (V237) (installed to the right at the A/C unit).
• Removal and installation for the "Comfort" version => [ Left Front Upper Body Outlet Motor, Comfort ] Left Front Upper Body Outlet Motor, Comfort
• Removal and installation for the "Basic" version => [ Front Upper Body Outlet Motors ] Front Upper Body Outlet Motors