A/C components, passenger compartment

Transcription

1 Page 1 of A/C components passenger compartmen Notes: Upon completion of any A/C system repairs, always check erase the Diagnostic Trouble Code (DTC) memory (scan tool function 02), perform basic setting (function 04) code the A/C control head -E87- (function 07). Checking coolin efficiency page Refrigerant circu page All components marked with an asterisk (*) are activated during output Diagnosti Test Mode (DTM (function 03) page Note different coding possibilities for A/C control head -E87- page Electrical testing can be performe on all components marked with a

2 Page 2 of 53 double asterisk (**) page Air distribution system page instrument pane cover Repair Manual, Body Interior, Repair Group 70.

3 Page 3 of Instrument panel vent, left Repair Manual, Body Interior, Repair Group 70. Note: page Side window defroster vent. 3 Outside air - temperature display - G106- * Outside temperature displayed in C or in F depending A/C control head -E87- setting. If display shows incorrect temperatures, check measured values for temperature sensors page 01-60, read measuring value block

4 Page 4 of 53 (Scan Tool function 08). 4 - Sunlight photo sensor - G107- ** page Windshield - defroster vent page

5 Page 5 of Instrument panel vent, center installin page Sender for outlet temperature, floor outlet - G192- ** installin page Footwell/defrost - flap motor -V85- With motor position sensor - G114-. installin page Actuating arm: yellow

6 Page 6 of Kickdown switch Depending on vehicle equipment current vehicle speed, A/C clutch -N25- is deactivated either by the ECM or TCM during full throttle acceleration page 01-60, read measuring value block (Scan Tool function 08) Footwell vent page Data Link - Connector (DLC) Use to connect VAG 1551/1552 or VAS 5051 to perform On Board Diagnostic (OBD) on Automatic Climate Control system

7 Page 7 of 53 page

8 Page 8 of A/C control head - E87- Notes: Notes: page E87- display operating buttons are illuminated by light emitting diodes (LEDs). Interior temperature sensor fan - V42- * instrument panel interior temperature sensor - G56- are integrated in -E Interior - temperature sensor fan - V42- * instrument panel interior temperature sensor - G56- Intake

9 Page 9 of 53 grille for sensor must not be obstructed. Fan sensor are integrated in -E87- cannot be replaced separately.

10 Page 10 of Heating - A/C unit (with heater core evaporator) page CAUTION! Overview page Disassembly assembly page heater core page Evaporator seal, page Heating A/C unit must only be removed after refrigerant has been discharged Control module for fresh air

11 Page 11 of 53 blower - J126- ** page Fresh air blower - V2 ** page

12 Page 12 of Instrument panel vent, right page Side window defroster vent. Repair Manual, Body Interior, Repair Group Fresh air - intake duct temperature sensor - G89- ** page Air flow flap motor - V71- * Actuates air flow flap fresh air / recirculated air flap. With motor position sensor -

13 Page 13 of 53 G113-. page

14 Page 14 of Evaporator housing drain pipe. Checking drain valve page Temperature - regulator flap motor - V68- * With motor position sensor - G92- page Actuating arm: black or pink Central flap motor -V70- * With motor position sensor - G112- page Actuating arm: green

15 Page 15 of A/C control head -E87-, removing Notes: Always check Diagnostic Trouble Code (DTC) memory before removing -E87-. After replacing -E87-, always: 1) Check coding or enter new coding 2) Perform basic setting 3) Check DTC memory. -E87- temperature display can be switched from C to F back by pressing holding the "recirculated air" button at the same time turning the temperature control knob towards "temperature+". If -E87- remains on after the ignition has been switched off, check for short circuit to B+ in the wiring to terminal 1 on connector D (connection for auxiliary heater) according to wiring diagram. If a newly installed A/C control head display flashes for about 2 minutes when the ignition is switched on, code the A/C control head (Scan Tool function 07) perform basic setting (Scan Tool function 04). If -E87- display does not light up when ignition is switched on, check the voltage supply from terminal 58d (instrument illumination dimmer) to -E87- according to wiring diagram, also page 01-87, Electrical testing. If -E87- control buttons do not light up when the vehicle lights are switched on, check voltage supply from terminal 58s (switch illumination) to -E87- according to wiring diagram, also page 01-87, Electrical testing. -E87- display control buttons are illuminated by LEDs cannot be replaced separately.

16 Page 16 of Note: As a running change in production, A/C con heads -E87- with part numbers including ind letters "A" onward may be installed. Th units differ from previous ones (without inde letter) as follows: On vehicles equipped with immobilizer, allocation of ignition key is recognized (transmitted by instrument cluster) is displayed in read measuring value block display group 009 page (functio Also see Repair Manual, Electrical Equipment, Repair Group 96. The last four compressor cut-out conditio effect for more than 20 seconds are stor displayed in read measuring value block display group 011 page (functio - Remove radio. Repair Manual, Radio, Telephone, Navigation, Repair Group Remove two grips from center console. Repair Manual, Body Interior, Repair Gr Remove ashtray trim -B- for instrume panel center section. Repair Manual, Body Interior, Repair Gr Note: When re- trim -B-, note proper pos of spring clips -C-. - Remove screws -A-. - Remove A/C control head -E87-.

17 Page 17 of Press release tabs -arrow- disconnect electrical connections. - Installation is in reverse order of removal.

18 Page 18 of Control module for fresh air blower -J126-, removing - Remove glove box. Repair Manual, Body Interior, Repair Group Disconnect electrical connection - A-. - Remove screw -B-. - Remove control unit -C- in direction of arrow.

19 Page 19 of Sender for outlet temperature, floor outlet -G192-, removing - Remove storage compartment on driver's side. Repair Manual, Body Interior, Repair Group Disconnect electrical connection - A-. - Turn sender -B- 90 pull out from housing.

20 Page 20 of Fresh air blower -V2-, removing - Remove glove box. Repair Manual, Body Interior, Repair Group Remove screw clip for foam covering. - Fold foam covering -A- away to one side. - Remove screws -B- cover -C-. - Disconnect electrical connection - A- from fresh air blower. - Pull fresh air blower -Bdownwards from housing.

21 Page 21 of Fresh air blower -V2-, separating from from base plate Note: On vehicles from initial production, the fresh air blower is secured to the base plate by a screw. The base plate may also have a special mat to provide noise insulation. - Remove screw -A-. - Remove fresh air blower from base plate -B-. Note: As a running change in production, the original version will gradually be replaced by one in which the fresh air blower is clipped to the base plate. - Depress retainer clips -A-. - Remove fresh air blower from base plate -B-. Notes: When re- the blower to the base plate, make sure that mounting lugs -C- are correctly positioned. After, make sure that fresh air blower is properly mounted to the base plate. After, make sure that fresh air blower is properly seated in the heating A/C unit housing.

22 Page 22 of Sunlight photo sensor -G107-, removing - Carefully disengage catches -Abetween instrument panel vent using a small screwdriver -B-. - Remove vent -C- in direction of - arrow- as illustrated. - Remove screw -A-. - Remove photo sensor -B-. - Disconnect electrical connection - C-. Note: If VAG 1551 Scan Tool display shows a constant value of around 90% when reading the measuring value block for A/C control head - E87-, (Display Group 006), check wiring terminal assignments to - E87- connector -C- according to wiring diagram (wiring may be improperly connected).

23 Page 23 of Footwell duct/vent, removing - Remove two grips from center console. Repair Manual, Body Interior, Repair Group Remove ashtray trim -A- for instrument panel center section. Repair Manual, Body Interior, Repair Group Remove glove box. Repair Manual, Body Interior, Repair Group Remove caps -B-. - Remove screws -C-. - Remove trim panels -A- -D-. - Remove footwell vent -E- towards driver's side -arrow-.

24 Page 24 of Footwell/defroster flap motor - V85-, removing - Remove driver's storage compartment. Repair Manual, Body Interior, Repair Group Disconnect electrical connection - A-. - Remove screws -B- (3x). - Disengage actuating arm -C- remove motor. Notes on installation: After, always carry out On Board Diagnostic (OBD) on Climate control page When motor, make sure actuating arm -C- is properly aligned installed. Route electrical wiring harness so that it cannot come into contact with any moving parts like the actuating arm on the motor or other.

25 Page 25 of Temperature regulator flap motor -V68-, removing - Remove footwell vent page Disconnect electrical connection - A-. - Remove bolts -B- (3x). - Disengage actuating arm -C- remove motor. Notes on installation: After, always carry out On Board Diagnostic (OBD) on Climate control page When motor, make sure actuating arm -C- is properly aligned installed. Route electrical wiring harness so that it cannot come into contact with any moving parts like the actuating arm on the motor or other.

26 Page 26 of Central air flap motor -V70-, removing - Remove footwell vent page Disconnect electrical connection - A-. - Remove screws -B- (3x). - Disengage actuating arm -C- remove motor. Notes on installation: After, always carry out On Board Diagnostic (OBD) on Climate control page When motor, make sure actuating arm -C- is properly aligned installed. Route electrical wiring harness so that it cannot come into contact with any moving parts like the actuating arm on the motor or other.

27 Page 27 of Fresh air intake duct temperature sensor -G89-, removing - Remove dust pollen filter page Remove glove box. Repair Manual, Body Interior, Repair Group Reach into the intake housing rotate temperature sensor -A Reach between heating A/C unit A-pillar remove temperature sensor from intake housing -arrow- with electrical connector -C- still attached. Notes: If the temperature sensor is difficult to rotate, carefully apply silicone spray to the contact surface of rubber grommet -B- on the intake housing. Checking -G89- page 01-87, Electrical testing.

28 Page 28 of Air flow flap motor -V71-, removing Note: -V71- operates the air flow flap fresh/recirculated air flap. - Remove glove box. Repair Manual, Body Interior, Repair Group Carefully detach actuating arm - A- (for air flow flap) with screwdriver. - Remove bolt -A-. - Disconnect electrical connection - C-. - Rotate motor downwards in direction -arrow- pull out of shaft for fresh/recirculated air flap -B-.

29 Page 29 of Notes on installation: Replacement motors are supplied set to "recirculated air" mode. To facilitate insta first connect motor to vehicle electrical s centralize actuating arm. This is don switching on the ignition pressing th "recirculated air" button on the A/C contr to change setting of motor. With the actu arm centralized, the fresh/recirculated ai does not touch the limit stops, the m can be installed more easily. - First insert motor into shaft of fresh/recircu air flap -B-. Then rotate in direction of -arrow making sure that lug -D- fits into slot -C-. After, always carry out On Boa Diagnostic (OBD) on Climate control p Route electrical wiring harness so that it come into contact with any moving parts actuating arm on the motor or other.

30 Page 30 of Heating A/C unit (with heater co evaporator), removing insta - Discharge refrigerant circuit page Remove dust pollen filter Page Switch ignition on. - Press "recirculated air" button on A/C con head -E Wait until air flow flap -A- closes (fresh/recirculated air flap moves to "recir air" position). - Switch off ignition with the air flow flap clo CAUTION! Before beginning repairs on the electrica system: Obtain the anti-theft radio security cod On vehicles with electrically adjustabl seats, move seats back as far as poss before disconnecting battery. Ignition OFF! Disconnect battery Ground (GND strap Notes: When the battery is reconnected, reset a check operation electrical equipment (ra clock, convenience system if applicable according to the Repair Manual /or O Manual.

31 Page 31 of Disconnect battery. - Release pressure in cooling system by op cap on coolant expansion tank. WARNING! The cooling system is pressurized when engine is warm. Wear gloves, safety glas other protection, carefully releas system pressure prior to proceeding with repairs. - Using tools 3094, clamp off both coolant for heater core at a point between the en connections -A-. - Remove spring clamps -B- detach co hoses. Notes: Coolant hoses must not be interchanged. Coolant hose -C- = supply hose from cylind (marked with letter "V") Coolant hose -D- = return hose to water pum (marked with letter "R") Bleeding cooling system Repair Manu Liter 4-Cyl. 5V Turbo Engine Mechanica Repair Group 19.

32 Page 32 of Place suitable container under connection -B- carefully expel coolant from heater core (using compressed air) through connection -A-. - Remove expansion valve page Seal off refrigerant pipes open connections -A- -B- on evaporator. - Remove hex nuts with washers - C-, tightening torque 15Nm (11 ft lb). Note: Washers for hex nuts should be fitted with seals.

33 Page 33 of Fold back pre-punched flaps -Aon insulation mat remove hex nuts washers -B- underneath, tightening torque 15 Nm (11 ft lb). - Remove glove box. Repair Manual, Body Interior, Repair Group Remove storage compartment on driver's side, dash panel center section instrument panel. Repair Manual, Body Interior, Repair Group Remove center console (complete). Repair Manual, Body Interior, Repair Group Remove footwell vent Page Remove air duct -A- (leading to defroster vent). - Remove front passenger's airbag unit (complete) together with lefth bracket for instrument panel cross member. Repair Manual, Body Interior, Repair Group Disconnect Ground (GND) connection between heating A/C unit ground connection at bottom of right A-pillar. Electrical Wiring Diagrams, Troubleshooting & Component Locations.

34 Page 34 of Cover all exposed connectors the A/ ducts (protection from drilling remains). - Drill two 7 mm holes in instrument panel support, one at each of the welding point marked -A- (drill through both layers). - Saw through support at -B- (e.g. using bo V.A.G 1523 A or equivalent). CAUTION! Do not saw through section -C- (reinforc or the instrument panel support. - Bend section -A- of support to one side in direction of -arrow- (or break off complete along break line -B-. WARNING! Remove any burrs sharp edges fro holes made in section -C- -D- of th support. Cover all resulting sharp edges (e.g. w adhesive tape).

35 Page 35 of Unplug all electrical wiring connections b vehicle systems the heating A/C - Remove unit towards passenger side -arr Notes on installation: Before, check all gaskets s the heating A/C unit for damage replace if necessary. When, check seal at intake hou Seal must face body side. Replace seal -A- ensure it is properl seated against contact surface -C-. After assembling, all cable ties which we removed in order to take out the air cond must be refitted in their original positions Replace both O-rings for refrigerant pipe expansion valve. Install refrigerant pipes free of stress.

36 Page 36 of Ensure evaporator drain pipe valve properly seated. Replace gasket ensure it is properly on the evaporator connecting flange. After the heating A/C unit, pro follows: - Bend section -A- of the instrument panel back into position. - Bolt section -B- (which is welded to sectio to section -C- of the support with two bolt (for example, M6 x 10 bolts) two com -E-. Note: When inserting bolts -D-, make sure they do contact the bracket for the airbag unit.

37 Page 37 of Heater core, removing - Remove heating A/C unit page Remove screws -C-. - Depress tabs -B- pull (lift) heater core -A- from housing. Notes: When heater core, always secure it in the heater flap housing with two suitable screws -C- (e.g.self-tapping screws, 3.2 x 20mm). This also applies even if the heat exchanger was originally only clipped in place. The heater core is installed in the heater flap housing without an all-round seal. Replace seal -A- ensure it is properly seated against contact surface -C-. Coolant flow direction is indicated on heater core -arrow B-.

38 Page 38 of Heating A/C unit (with heater core evaporator) mechanical components, overview heating A/C unit page Heater core page Seal Always replace Seals heater core from engine compartment. 3 - Mounting flange 4 - Screw 5 - Evaporator housing seal Always replace Seals refrigerant pipes from engine compartment. Location Fig.

39 Page 39 of Defroster duct page

40 Page 40 of Tensioning strap Must be installed correctly Fig Climate control system wiring harness When, ensure proper clearance to moving parts Fig Kick panel Secured with tensioning strap screw clips Screw clip 11 - Footwell duct/vent page Heating A/C unit With electrical components

41 Page 41 of 53 Electrical components, overview page Disassembly assembly page

42 Page 42 of Fig. 1 Tensioning strap, Notes: Ensure tensioning strap -A- is installed located in the correct positions around the housing. The tensioning strap also holds the cover on the evaporator housing. Fig. 2 Installing wiring harness for air conditioner Notes: Wiring harness -A- must be positioned so that it cannot come into contact with any moving parts (e.g. actuating arms -B- for positioning motors). Secure wiring harness with suitable tie wraps to prevent it from coming loose.

43 Page 43 of Fig. 3 Evaporator housing seal, location Note: Always replace seal -A-, install securely in recess around the evaporator housing.

44 Page 44 of Heating A/C unit (with heater core evaporator) electrical components, overview 1 - Heating A/C unit Disassembl assembly page Fresh air intake duct temperature sensor -G89- page Air flow flap motor -V71- Operates the air flow flap fresh/recirculate air flap. 4 - Screw With motor position sensor - G113-. page

45 Page 45 of Actuating arm To air flap 6 - Control module for fresh air blower -J126- page Screw 8 - Fresh air blower -V2- page Mounting plate 10 - Screw 11 Noise - insulation Not installed on all vehicles Screw 13 - Cover

46 Page 46 of Screw 15 - Screw 16 Temperature - regulator flap motor - V68- With motor position sensor - G92-. page Actuating arm: black or pink Actuating arm 18 - Central air flap motor -V70- With motor position sensor - G112-. page Actuating arm: green Actuating arm

47 Page 47 of Footwell/defros - flap motor -V85 With motor position sensor -G1. a page Actuating a yellow Actuating ar 22 - Mounting bracket for - V Sender for outlet temperature, floor outlet - G192- a page 87-80

48 Page 48 of Heating A/C unit (with heater core evaporator), disassembly assembly 1 - Seal Seals intake duct against air intake plenum. Check replace if damaged. 2 - Air flap Lightly lubricate hinge pivots with grease G A3 or equivalent. 3 - Grommet 4 - Lever 5 Air - distribution housing, upper part Assembly Fig. 1. Installing seal at refrigerant pipes Fig. 2.

49 Page 49 of Fresh/recirculat - flap Lightly lubricate hinge pivots with grease A3 equivalent. 7 - Evaporator Installing se at refrigeran pipes Fig 2. Installing se Fig Pivot bushin Lightly lubricate wi grease G A3 or equivalent. 9 - Air distributi housing, low part 10 - Screw Assembly Fig. 1. Installing se at refrigeran pipes Fig 2.

50 Page 50 of Pivot bushin Lightly lubricate wi grease G A3 or equivalent Central flap lever 13 - Screw 14 - Temperature flap lever 15 - Central flap Note installation position (shorter section of fl faces up). 16 Footwell/defros - flap Lightly lubricate hin pivots with grease G A3 or equivalent Temperature flap 18 - Seal Installing se at refrigeran pipes Fig 2.

51 Page 51 of Threaded - bracket 20 - O-Ring page O-Ring page Expansion - valve refrigerant pipes page page insulation page Bolt Tightening torque: 8 Nm (71 in lb) Air deflector

52 Page 52 of Fig. 1 Air distribution housing, assembly - Secure both halves of the housing with screws -A- at locations (example) -B-. Fig. 2 Refrigerant pipe seal at evaporator, Evaporator refrigerant pipes -Cmust be completely encapsulated by seal -A- between both halves of the air distribution housing -B-. - After securing both halves of the housing, apply silicone seal as necessary at any open locations. Housing must be completely sealed against entry of hot air from the engine compartment or warm air from the passenger compartment, otherwise, cooling efficiency will be affected.

53 Page 53 of Fig. 3 Note: Evaporator seal, - Evaporator -A- must be sealed (top sides with gasket -B-) against the air distribution housing A gap must remain in the seal on the bottom of the evaporator to allow water to drain.