Air Conditioning (Service Information): Overview Lexus GS III facelift

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1. INSPECT REFRIGERANT VOLUME Check the sight glass on the liquid tube sub-assembly A. Test conditions: Engine is running at 1,500 rpm. Blower speed control switch is at HI. A/C switch is ON. Temperature control switch is at the MAX. COOL position. Doors are fully open. Item Symptom Amount of Refrigerant Corrective Procedures 1 Bubbles visible Insufficient * (1) Check for gas leakage and repair if necessary (2) Add refrigerant until bubbles disappear 2 No bubbles visible Empty, insufficient or too much Refer to items 3 and 4 3 No temperature difference between compressor inlet and outlet Empty or nearly empty (1) Check for gas leakage with gas leak detector and repair if necessary (2) Add refrigerant until bubbles disappear 4 Considerable temperature difference between compressor inlet and outlet Correct or too much Refer to items 5 and 6 5 Immediately after A/C is turned OFF, refrigerant becomes clear Too much (1) Drain or discharge refrigerant (2) Bleed air and supply proper amount of purified refrigerant 6 Immediately after A/C is turned OFF, refrigerant foams and then becomes clear Correct - HINT: * : If the ambient temperature is higher than usual but cooling is sufficient, bubbles in the sight glass are permissible.
2. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET This method uses a manifold gauge set to locate problem areas. Read the manifold gauge pressure when these conditions are established. Test conditions: Temperature at the air inlet is 30 to 35°C (86 to 95°F). Engine is running at 1,500 rpm. All doors are fully open. Blower speed control switch is at HI. Temperature control switch is at MAX. COOL. A/C switch is ON. Gauge readings (Reference) Normally functioning refrigeration system Gauge reading Pressure side Refrigerant volume Low 0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm 2 ) High 1.37 to 1.57 MPa (14 to 16 kgf/cm 2 ) The A/C system periodically changes between normal and improper function due to moisture in the refrigerant system. Symptoms Probable Cause Diagnosis Corrective Actions During operation, pressure on low - pressure side cycles between normal and vacuum Moisture in refrigeration system freezes at expansion valve orifice, causing temporary stop of cycle. However, when melted, normal state is restored - Drier is overly saturated - Moisture in refrigeration system freezes at expansion valve orifice and blocks refrigerant circulation 1. Replace cooler drier 2. Remove moisture from cycle by repeatedly evacuating air 3. Supply appropriate volume of new refrigerant The A/C system does not function effectively due to insufficient cooling. Symptoms Probable Cause Diagnosis Corrective Actions - Pressure low on both low and high-pressure sides - Cooling performance insufficient Gas leakage from refrigeration system - Insufficient refrigerant - Refrigerant leakage 1. Check for gas leakage and repair if necessary 2. Supply appropriate volume of new refrigerant 3. If indicated pressure value close to 0 when connected to gauge, create vacuum after inspecting and repairing the location of leakage The A/C system does not function effectively due to poor circulation of the refrigerant. Symptoms Probable Cause Diagnosis Corrective Actions - Pressure low on both low and high-pressure sides - Frost exists on piping from condenser to A/C unit Refrigerant flow obstructed by dirt in condenser Condenser clogged Replace condenser The A/C system does not function intermittently because the refrigerant does not circulate. Symptoms Probable Cause Diagnosis Corrective Actions - Vacuum indicated on low-pressure side, and extremely low pressure indicated on high-pressure side - Frost or condensation seen on piping on both sides of condenser or expansion valve - Refrigerant flow obstructed by moisture or dirt in refrigeration system - Refrigerant flow obstructed by gas leakage from expansion valve Refrigerant does not circulate 1. Check expansion valve 2. Clean expansion valve by blowing air 3. Replace condenser 4. Evacuate air and charge appropriate volume of new refrigerant 5. For gas leakage from expansion valve, replace expansion valve The A/C system does not function effectively due to overcharged refrigerant or insufficient cooling of the condenser. Symptoms Probable Cause Diagnosis Corrective Actions Pressure extremely high on both low and high-pressure sides - Excessive refrigerant - Cooling performance of condenser insufficient - Condenser is dirty - Condenser fan motor is malfunctioning - Excessive refrigerant 1. Clean condenser 2. Check condenser fan motor operation 3. If 1 and 2 normal, check the amount of refrigerant and supply appropriate volume of refrigerant The A/C system does not function due to air in the refrigeration system. WARNING: The low-pressure piping may be very hot and cause serious burns. Symptoms Probable Cause Diagnosis Corrective Actions - Pressure extremely high on both low and high-pressure sides - The low-pressure piping is too hot to touch Air in refrigeration system - Air in refrigeration system - Vacuum purging insufficient 1. Check if compressor oil is dirty or insufficient 2. Evacuate air and charge new refrigerant The A/C system does not function effectively due to an expansion valve malfunction. Symptoms Probable Cause Diagnosis Corrective Actions -Pressure extremely high on both low and high-pressure sides -Frost or condensation on piping on low-pressure side Problem with expansion valve - Excessive refrigerant in low pressure piping - Expansion valve too wide open Replace expansion valve The A/C system does not function due to a defective compressor. Symptoms Probable Cause Diagnosis Corrective Actions -Pressure extremely high on both low and high-pressure sides -Pressure extremely low on high-pressure side Internal leakage in compressor - Compression failure - Leakage from damaged valve or broken sliding parts Repair or replace compressor

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1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM Start up the engine. A/C switch is ON. Operate the cooler compressor with an engine speed of approximately 1,000 rpm for 5 to 6 minutes to circulate the refrigerant and collect the compressor oil remaining in each component into the cooler compressor. Stop the engine. Recover the refrigerant from the A/C system using a refrigerant recovery unit.
2. CHARGE REFRIGERANT Perform vacuum purging using a vacuum pump. Charge refrigerant HFC-134a (R134a). Standard 450 +- 50 g (15.87 +- 1.76 oz.) (except 1UR-FSE) 550 +- 50 g (19.39 +- 1.76 oz.) (for 1UR-FSE) SST: 09985-20010 (09985-02010 ,09985-02050 ,09985-02060 ,09985-02070 ,09985-02080 ,09985-02090 ,09985-02110 ,09985-02130 ,09985-02140 ,09985-02150) NOTE: Do not operate the cooler compressor before charging refrigerant as the cooler compressor will not work properly without any refrigerant, and will overheat. Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear. The refrigerant amount should be checked by measuring its quantity, and not with the sight glass.
3. WARM UP ENGINE (for 2GR-FSE) Warm up the engine at less than 1,850 rpm for 2 minutes or more after charging the refrigerant. NOTE: Be sure to warm up the compressor when turning the A/C switch ON after removing and installing the cooler refrigerant lines (including the compressor), to prevent damage to the compressor.
4. WARM UP ENGINE (for 1UR-FSE) Warm up the engine at less than 1,570 rpm for 2 minutes or more after charging the refrigerant. NOTE: Be sure to warm up the compressor when turning the A/C switch ON after removing and installing the cooler refrigerant lines (including the compressor), to prevent damage to the compressor.
5. INSPECT FOR REFRIGERANT LEAK After recharging the refrigerant gas, check for refrigerant gas leakage using a halogen leak detector. Perform the operation under these conditions: Stop the engine. Secure good ventilation (the gas leak detector may react to volatile gases other than refrigerant, such as evaporated gasoline or exhaust gas). Repeat the test 2 or 3 times. Make sure that some refrigerant remains in the refrigeration system. When compressor is off: approximately 392 to 588 kPa (4 to 6 kgf*cm 2 57 to 85 psi) Using a gas leak detector, check the refrigerant line for leakage. If a gas leak is not detected on the drain hose, remove the blower motor control (blower resistor) from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test. Disconnect the connector and leave the pressure switch on for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.

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1. REMOVE COOL AIR INTAKE DUCT SEAL. Refer to «REMOVAL - Step 15»(ref-382704-S06161003072011012800000)
2. REMOVE ENGINE ROOM SIDE COVER LH. Refer to «REMOVAL - Step 3»(ref-382735-S40525517372011012800000)
3. REMOVE FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY LH. Refer to «REMOVAL - Step 4»(ref-382735-S40525517372011012800000)
4. REMOVE FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY RH. Refer to «REMOVAL - Step 5»(ref-382735-S40525517372011012800000)
5. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY RH. Refer to «REMOVAL - Step 7»(ref-382735-S40525517372011012800000)
6. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY LH. Refer to «REMOVAL - Step 6»(ref-382735-S40525517372011012800000)
7. REMOVE FRONT FENDER TO COWL SIDE SEAL LH. Refer to «REMOVAL - Step 8»(ref-382735-S40525517372011012800000)
8. REMOVE FRONT FENDER TO COWL SIDE SEAL RH. Refer to «REMOVAL - Step 9»(ref-382735-S40525517372011012800000)
9. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY. Refer to «REMOVAL - Step 10»(ref-382735-S40525517372011012800000)
10. REMOVE FRONT WIPER MOTOR AND LINK ASSEMBLY. Refer to «REMOVAL - Step 11»(ref-382735-S40525517372011012800000)
11. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM See step 1
12. DISCONNECT SUCTION PIPE SUB-ASSEMBLY Remove the bolt and slide the hook connector. Disconnect the suction pipe. Remove the O-ring from the suction pipe. NOTE: Seal the openings of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering them.
13. DISCONNECT LIQUID TUBE SUB-ASSEMBLY A Disconnect the liquid tube. Remove the O-ring from the liquid tube. NOTE: Seal the openings of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering them.
14. DISCONNECT HEATER WATER OUTLET HOSE A Using pliers, grip the claws of the clip and slide the clip to disconnect the heater water outlet hose.
15. DISCONNECT HEATER WATER HOSE INLET A HINT: Disconnection of the heater water outlet hose is the same as for the heater water inlet hose.
16. TABLE OF BOLT, SCREW AND NUT . Refer to «REMOVAL - Step 1»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
17. SET RADIO RECEIVER ASSEMBLY TO SHIPMENT . Refer to «REMOVAL - Step 2»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
18. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
19. REMOVE FRONT DOOR SCUFF PLATE INSIDE RH. Refer to «REMOVAL - Step 10»(ref-382776-S03570080112011012800000)
20. REMOVE FRONT DOOR SCUFF PLATE INSIDE LH. Refer to «REMOVAL - Step 9»(ref-382776-S03570080112011012800000)
21. REMOVE FRONT DOOR OPENING TRIM COVER RH. Refer to «REMOVAL - Step 12»(ref-382776-S03570080112011012800000)
22. REMOVE FRONT DOOR OPENING TRIM COVER LH. Refer to «REMOVAL - Step 11»(ref-382776-S03570080112011012800000)
23. REMOVE STEERING WHEEL NO. 2 COVER LOWER. Refer to «REMOVAL - Step 3»(ref-382579-S26092704932011012800000)
24. REMOVE STEERING WHEEL NO. 3 COVER LOWER. Refer to «REMOVAL - Step 2»(ref-382579-S26092704932011012800000)
25. REMOVE STEERING PAD. Refer to «REMOVAL - Step 4»(ref-382579-S26092704932011012800000)
26. REMOVE STEERING WHEEL ASSEMBLY for 2GR-FSE. Refer to «REMOVAL - Step 16»(ref-382576-S24000662872011012800000) for 1UR-FSE. Refer to «REMOVAL - Step 16»(ref-382576-S10236865002011012800000)
27. REMOVE STEERING COLUMN COVER LOWER for 2GR-FSE. Refer to «REMOVAL - Step 17»(ref-382576-S24000662872011012800000) for 1UR-FSE. Refer to «REMOVAL - Step 17»(ref-382576-S10236865002011012800000)
28. REMOVE STEERING COLUMN COVER UPPER for 2GR-FSE. Refer to «REMOVAL - Step 17»(ref-382576-S24000662872011012800000) for 1UR-FSE. Refer to «REMOVAL - Step 17»(ref-382576-S10236865002011012800000)
29. REMOVE SPIRAL CABLE WITH STEERING SENSOR. Refer to «REMOVAL - Step 8»(ref-382579-S09211221172011012800000)
30. REMOVE WINDSHIELD WIPER SWITCH ASSEMBLY. Refer to «REMOVAL - Step 9»(ref-382735-S22096416712011012800000)
31. REMOVE HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to «REMOVAL - Step 11»(ref-382769-S34298017112011012800000)
32. REMOVE FRONT CONSOLE UPPER PANEL GARNISH . Refer to «REMOVAL - Step 17»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
33. REMOVE CONSOLE UPPER PANEL ASSEMBLY . Refer to «REMOVAL - Step 18»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
34. REMOVE INSTRUMENT PANEL FINISH PANEL END RH . Refer to «REMOVAL - Step 19»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
35. REMOVE INSTRUMENT PANEL FINISH PANEL END LH . Refer to «REMOVAL - Step 20»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
36. REMOVE CONSOLE BOX PLATE . Refer to «REMOVAL - Step 21»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
37. REMOVE CONSOLE BOX REGISTER ASSEMBLY . Refer to «REMOVAL - Step 22»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
38. REMOVE CONSOLE BOX . Refer to «REMOVAL - Step 23»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
39. REMOVE STEERING COLUMN ASSEMBLY For 2GR-FSE. Refer to «REMOVAL - Step 23»(ref-382576-S24000662872011012800000) For 1UZ-FSE. Refer to «REMOVAL - Step 24»(ref-382576-S10236865002011012800000)
40. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY . Refer to «REMOVAL - Step 24»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
41. REMOVE COMBINATION METER ASSEMBLY . Refer to «REMOVAL - Step 25»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
42. REMOVE INSTRUMENT SIDE PANEL RH . Refer to «REMOVAL - Step 26»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
43. REMOVE INSTRUMENT SIDE PANEL LH . Refer to «REMOVAL - Step 27»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
44. REMOVE INSTRUMENT PANEL NO. 1 UNDER COVER . Refer to «REMOVAL - Step 28»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
45. REMOVE INSTRUMENT PANEL NO. 1 SAFETY PAD . Refer to «REMOVAL - Step 29»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
46. REMOVE DRIVER SIDE KNEE AIRBAG ASSEMBLY. Refer to «REMOVAL - Step 10»(ref-382579-S00433192122011012800000)
47. REMOVE INTEGRATION CONTROL AND PANEL ASSEMBLY . Refer to «REMOVAL - Step 31»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
48. REMOVE INSTRUMENT PANEL NO. 2 UNDER COVER SUB-ASSEMBLY . Refer to «REMOVAL - Step 32»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
49. REMOVE STEERING CONTROL ECU. Refer to «REMOVAL - Step 3»(ref-382576-S06530235522011012800000)
50. REMOVE FRONT PASSENGER SIDE KNEE AIRBAG ASSEMBLY. Refer to «REMOVAL - Step 9»(ref-382579-S22964692752011012800000)
51. REMOVE GLOVE COMPARTMENT DOOR SUB-ASSEMBLY . Refer to «REMOVAL - Step 34»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
52. REMOVE FRONT PILLAR GARNISH RH. Refer to «REMOVAL - Step 14»(ref-382776-S03570080112011012800000)
53. REMOVE FRONT PILLAR GARNISH LH. Refer to «REMOVAL - Step 13»(ref-382776-S03570080112011012800000)
54. REMOVE MULTI-DISPLAY WITH RADIO RECEIVER. Refer to «REMOVAL - Step 7»(ref-382808-S15854524902011012800000)
55. REMOVE INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY . Refer to «REMOVAL - Step 38»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
56. REMOVE NO. 2 CONSOLE BOX DUCT Remove the 2 clips and console box duct.
57. REMOVE NO. 1 CONSOLE BOX DUCT Remove the console box duct.
58. REMOVE DEFROSTER LOWER NOZZLE ASSEMBLY Release the 4 claws and remove the nozzle.
59. DISCONNECT TRANSPONDER KEY ECU ASSEMBLY Disconnect the clamp. Remove the screw and ECU.
60. REMOVE INSTRUMENT PANEL REINFORCEMENT ASSEMBLY Detach the 27 clamps and disconnect the connectors. Then disconnect the wire harness. Remove the 3 nuts, 2 bolts and disconnect the 2 junction blocks. Remove the cap and bolt. Remove the 6 bolts and 2 screws. Using a T40 "torx" socket, remove the 5 "torx" bolts. HINT: The "torx" bolts on the passenger side can be removed with the collar for adjustment. Using a 12 mm hexagon wrench, remove the 2 collars and instrument panel reinforcement.
61. REMOVE AIR CONDITIONING UNIT ASSEMBLY Remove the nut and A/C unit.
62. REMOVE NO. 2 AIR DUCT Remove the screw and duct.
63. REMOVE FOOT DUCT LOWER Detach the 2 claws and remove the foot duct.
64. REMOVE FOOT DUCT UPPER Detach the 2 claws and remove the foot duct.
65. REMOVE AIR CONDITIONING AMPLIFIER ASSEMBLY See step 12
66. REMOVE BLOWER ASSEMBLY Disconnect the connector. Remove the screw. Detach the 2 claws and remove the blower.

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1. REMOVE AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY Remove the packing from the A/C tube. Using a 4 mm hexagon wench, remove the 2 hexagon bolts and A/C tube. Remove the 2 O-rings from the A/C tube.
2. REMOVE COOLER EXPANSION VALVE Remove the cooler expansion valve from the cooler evaporator.
3. REMOVE AIR OUTLET CONTROL SERVOMOTOR RH Disconnect the connector. Remove the 3 screws and servomotor.
4. REMOVE AIR MIX CONTROL SERVOMOTOR RH Remove the 3 clamps and connector and disconnect the wire harness. Remove the 2 screws and heater piping cover. Remove the 3 screws and air servomotor.
5. REMOVE AIR CONDITIONING HARNESS ASSEMBLY Disconnect the 2 connectors and detach the 2 clamps. Detach the 4 clamps and then disconnect the wire harness. Remove the A/C harness as shown in the illustration.
6. REMOVE AIR OUTLET CONTROL SERVOMOTOR LH Remove the 2 screws and air duct. Remove the 4 screws and servomotors. Remove the 3 screws. Detach the claw and remove the air outlet control servomotor.
7. REMOVE AIR MIX CONTROL SERVOMOTOR LH Remove the 3 screws. Release the claw and remove the servomotor.
8. REMOVE HEATER RADIATOR UNIT SUB-ASSEMBLY Remove the screw and clamp. Remove the radiator unit.
9. REMOVE NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY Remove the 5 screws. Release the 3 claws and remove the air duct case. Remove the cooler evaporator from the heater case. Remove the 2 O-rings from the cooler evaporator.

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1. INSPECT DAMPER SERVOMOTOR (AIR MIX AND AIR OUTLET) Connect the battery's positive (+) lead to terminal 5 of each servomotor and the battery's negative (-) lead to terminal 4. Check that the damper operates smoothly. Connect the battery's positive (+) lead to terminal 4 of each servomotor and the battery's negative (-) lead to terminal 5. Check that the damper operates smoothly.

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1. INSTALL NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY Sufficiently apply compressor oil to 2 new O-rings and the fitting surface of the cooler evaporator. Compressor oil ND-OIL or equivalent Install the 2 O-rings on the cooler evaporator. Install the air duct with the 3 claws and 5 screws.
2. INSTALL HEATER RADIATOR UNIT SUB-ASSEMBLY Install the clamp with the screw and install the heater radiator unit.
3. INSTALL AIR OUTLET CONTROL SERVOMOTOR LH Install the air mix control servomotor with the 3 screws. Temporarily install the drive gear to the air outlet control servomotor. Check that the drive gear and the driven gear are engaged at a point with the same number of gear teeth from the standard position. Install the drive gear to the air outlet control servomotor. NOTE: If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, remove the drive gear, adjust the driven gear, and reinstall the drive gear. The number of gear teeth, from the standard position, varies according to the stop position of the air outlet control servomotor. Make sure that the gears are engaged at a point with the same number of gear teeth from the standard position. If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, the air outlet control servomotor may not operate normally.
4. INSTALL AIR MIX CONTROL SERVOMOTOR LH Install the air mix control servomotor with the 3 screws. Install the drive gear to the air mix control servomotor. Temporarily install the mode damper servo so that the levers fit into each groove. Slightly lift the mode damper servo. Check that the drive gear and driven gear are engaged at a point with the same number of gear teeth from the standard position from the view indicated by arrow (A). NOTE: If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, lift the mode damper to adjust the driven gear and reinstall the mode damper servo. If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, the mode damper servo may not operate normally. Install the mode damper with the 4 screws. Install the air duct with the 2 screws.
5. INSTALL AIR CONDITIONING HARNESS ASSEMBLY Attach the 4 clamps to install the wire harness. Install the A/C harness as shown in the illustration. Connect the 2 connectors and attach the clamp.
6. INSTALL AIR MIX CONTROL SERVOMOTOR RH Check that the drive gear and the driven gear are engaged at a point with the same number of gear teeth from the standard position. Temporarily install the air mix control servomotor. NOTE: If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, remove the air mix control servomotor to adjust the driven gear and reinstall the air mix control servomotor. The number of gear teeth, from the standard position, varies according to the stop position of the air mix control servomotor. Make sure that the gears are engaged at a point with the same number of gear teeth from the standard position. If there is not the same number of gear teeth from the standard position on each gear at the point where the two gears are engaged, the air mix control servomotor may not operate normally. Install the air mix control servomotor with the 3 screws.
7. INSTALL AIR OUTLET CONTROL SERVOMOTOR RH Install the servomotor with the 3 screws. Connect the connector.
8. INSTALL COOLER EXPANSION VALVE Install the cooler expansion valve to the cooler evaporator.
9. INSTALL AIR CONDITIONING TUBE AND ACCESSORY Sufficiently apply compressor oil to 2 new O-rings and the fitting surface of the A/C tube. Compressor oil ND-OIL or equivalent Install the 2 O-rings on the A/C tube. Using a 4 mm hexagon wrench, install the A/C tube with the 2 hexagon bolts. Torque: 3.5 N*m ( 35 kgf*cm, 30 in.*lbf) Install a new packing.

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1. INSTALL BLOWER ASSEMBLY Install the blower with the 2 claws and screw. Torque: 3.0 N*m ( 30 kgf*cm, 27 in.*lbf) Connect the connector.
2. INSTALL AIR CONDITIONING AMPLIFIER ASSEMBLY See step 1
3. INSTALL NO. 2 AIR DUCT Install the duct with the screw.
4. INSTALL FOOT DUCT UPPER Attach the 2 claws and install the foot duct.
5. INSTALL FOOT DUCT LOWER Attach the 2 claws to install the foot duct.
6. INSTALL AIR CONDITIONING UNIT ASSEMBLY Install the A/C unit with the nut. Torque: 9.8 N*m ( 100 kgf*cm, 7 ft.*lbf)
7. INSTALL INSTRUMENT PANEL REINFORCEMENT ASSEMBLY Driver side: Using a T40 "torx" socket, install the instrument panel reinforcement with the 3 "torx" bolts. Torque: 17 N*m ( 173 kgf*cm, 13 ft.*lbf) Passenger side: Using a 12 mm hexagon wrench, install the instrument panel reinforcement with the 2 bolts. Torque: 6.0 N*m ( 61 kgf*cm, 53 in.*lbf) Using a T40 "torx" socket, install the instrument panel reinforcement with the 2 "torx" bolts. Torque: 20 N*m ( 204 kgf*cm, 15 ft.*lbf) Install the instrument panel reinforcement with the 6 bolts and 2 screws. Torque: 9.8 N*m ( 100 kgf*cm, 7 ft.*lbf) for bolt A Install the bolt and cap. Connect the 2 connectors and attach the 27 clamps. Install the 2 junction blocks with the 2 bolts and 3 nuts.
8. CONNECT TRANSPONDER KEY ECU ASSEMBLY Install the transponder key ECU with the screw. Attach the clamp.
9. INSTALL DEFROSTER LOWER NOZZLE ASSEMBLY Attach the 4 claws and install the defroster lower nozzle.
10. INSTALL NO. 1 CONSOLE BOX DUCT Install the console box duct.
11. INSTALL NO. 2 CONSOLE BOX DUCT Install the console box duct with the 2 clips.
12. INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY . Refer to «INSTALLATION - Step 1»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
13. INSTALL MULTI-DISPLAY WITH RADIO RECEIVER ASSEMBLY. Refer to «INSTALLATION - Step 3»(ref-382808-S33727889932011012800000)
14. INSTALL FRONT PILLAR GARNISH LH. Refer to «INSTALLATION - Step 25»(ref-382776-S01383211072011012800000)
15. INSTALL FRONT PILLAR GARNISH RH. Refer to «INSTALLATION - Step 26»(ref-382776-S01383211072011012800000)
16. INSTALL GLOVE COMPARTMENT DOOR SUB-ASSEMBLY . Refer to «INSTALLATION - Step 5»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
17. INSTALL FRONT PASSENGER SIDE KNEE AIRBAG ASSEMBLY. Refer to «INSTALLATION - Step 1»(ref-382579-S41050233712011012800000)
18. INSTALL STEERING CONTROL ECU. Refer to «INSTALLATION - Step 1»(ref-382576-S17968903012011012800000)
19. INSTALL INSTRUMENT PANEL NO. 2 UNDER COVER SUB-ASSEMBLY . Refer to «INSTALLATION - Step 7»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
20. INSTALL INTEGRATION CONTROL AND PANEL ASSEMBLY . Refer to «INSTALLATION - Step 8»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
21. INSTALL DRIVER SIDE KNEE AIRBAG ASSEMBLY. Refer to «INSTALLATION - Step 1»(ref-382579-S10958456542011012800000)
22. INSTALL INSTRUMENT PANEL NO. 1 SAFETY PAD SUB-ASSEMBLY . Refer to «INSTALLATION - Step 10»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
23. INSTALL INSTRUMENT PANEL NO. 1 UNDER COVER SUB-ASSEMBLY . Refer to «INSTALLATION - Step 11»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
24. INSTALL INSTRUMENT SIDE PANEL LH . Refer to «INSTALLATION - Step 12»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
25. INSTALL INSTRUMENT SIDE PANEL RH . Refer to «INSTALLATION - Step 13»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
26. INSTALL COMBINATION METER ASSEMBLY . Refer to «INSTALLATION - Step 14»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
27. INSTALL INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY . Refer to «INSTALLATION - Step 15»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
28. INSTALL CONSOLE BOX . Refer to «INSTALLATION - Step 16»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
29. INSTALL STEERING COLUMN ASSEMBLY For 2GR-FSE. Refer to «INSTALLATION - Step 2»(ref-382576-S04257373792011012800000) For 1UZ-FSE. Refer to «INSTALLATION - Step 3»(ref-382576-S04506970632011012800000)
30. INSTALL CONSOLE BOX REGISTER ASSEMBLY . Refer to «INSTALLATION - Step 17»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
31. INSTALL CONSOLE BOX PLATE . Refer to «INSTALLATION - Step 18»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
32. INSTALL INSTRUMENT PANEL FINISH PANEL END LH . Refer to «INSTALLATION - Step 19»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
33. INSTALL INSTRUMENT PANEL FINISH PANEL END RH . Refer to «INSTALLATION - Step 20»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
34. INSTALL CONSOLE UPPER PANEL ASSEMBLY . Refer to «INSTALLATION - Step 21»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
35. INSTALL FRONT CONSOLE UPPER PANEL GARNISH . Refer to «INSTALLATION - Step 22»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
36. INSTALL HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to «INSTALLATION - Step 1»(ref-382769-S00007975372011012800000)
37. INSTALL WINDSHIELD WIPER SWITCH ASSEMBLY. Refer to «INSTALLATION - Step 1»(ref-382735-S31904194312011012800000)
38. INSTALL SPIRAL CABLE WITH STEERING SENSOR. Refer to «INSTALLATION - Step 1»(ref-382579-S05105236722011012800000)
39. INSTALL STEERING COLUMN COVER UPPER For 2GR-FSE. Refer to «INSTALLATION - Step 9»(ref-382576-S04257373792011012800000) For 1UZ-FSE. Refer to «INSTALLATION - Step 10»(ref-382576-S04506970632011012800000)
40. INSTALL STEERING COLUMN COVER LOWER For 2GR-FSE. Refer to «INSTALLATION - Step 9»(ref-382576-S04257373792011012800000) For 1UZ-FSE. Refer to «INSTALLATION - Step 10»(ref-382576-S04506970632011012800000)
41. INSTALL STEERING WHEEL ASSEMBLY For 2GR-FSE. Refer to «INSTALLATION - Step 11»(ref-382576-S04257373792011012800000) For 1UZ-FSE. Refer to «INSTALLATION - Step 12»(ref-382576-S04506970632011012800000)
42. INSTALL STEERING PAD. Refer to «INSTALLATION - Step 1»(ref-382579-S09414220342011012800000)
43. INSTALL STEERING WHEEL NO. 3 COVER LOWER
44. INSTALL STEERING WHEEL NO. 2 COVER LOWER
45. INSTALL FRONT DOOR OPENING TRIM COVER LH. Refer to «INSTALLATION - Step 27»(ref-382776-S01383211072011012800000)
46. INSTALL FRONT DOOR OPENING TRIM COVER RH. Refer to «INSTALLATION - Step 28»(ref-382776-S01383211072011012800000)
47. INSTALL FRONT DOOR SCUFF PLATE LH. Refer to «INSTALLATION - Step 29»(ref-382776-S01383211072011012800000)
48. INSTALL FRONT DOOR SCUFF PLATE RH. Refer to «INSTALLATION - Step 30»(ref-382776-S01383211072011012800000)
49. INSTALL HEATER WATER HOSE INLET A Install the water hose and attach the clip.
50. INSTALL HEATER WATER OUTLET HOSE A Use the same procedures described for the water hose.
51. INSTALL LIQUID TUBE SUB-ASSEMBLY A Remove the vinyl tape attached to the tube. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the liquid tube. Compressor oil ND-OIL 8 or equivalent Install the O-ring on the liquid tube. Install the liquid tube to the fitting hole.
52. INSTALL SUCTION PIPE SUB-ASSEMBLY Remove the vinyl tape attached to the pipe. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the suction pipe. Compressor oil ND-OIL 8 or equivalent Install the O-ring on the suction pipe. Move the hook connector in the direction indicated by the arrow in the illustration. Insert the pipe joints into the fitting holes securely and tighten the bolt. Torque: 9.8 N*m ( 100 kgf*cm, 7 ft.*lbf)
53. INSTALL FRONT WIPER MOTOR AND LINK ASSEMBLY. Refer to «INSTALLATION - Step 2»(ref-382735-S02822456132011012800000)
54. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY. Refer to «INSTALLATION - Step 3»(ref-382735-S02822456132011012800000)
55. INSTALL FRONT FENDER TO COWL SIDE SEAL LH. Refer to «INSTALLATION - Step 4»(ref-382735-S02822456132011012800000)
56. INSTALL FRONT FENDER TO COWL SIDE SEAL RH. Refer to «INSTALLATION - Step 5»(ref-382735-S02822456132011012800000)
57. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH. Refer to «INSTALLATION - Step 6»(ref-382735-S02822456132011012800000)
58. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH. Refer to «INSTALLATION - Step 7»(ref-382735-S02822456132011012800000)
59. INSTALL ENGINE ROOM SIDE COVER LH. Refer to «INSTALLATION - Step 8»(ref-382735-S02822456132011012800000)
60. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY LH. Refer to «INSTALLATION - Step 9»(ref-382735-S02822456132011012800000)
61. INSTALL FRONT PILLAR TO FRONT SIDE SEAL SUB-ASSEMBLY RH. Refer to «INSTALLATION - Step 10»(ref-382735-S02822456132011012800000)
62. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
63. ADD ENGINE COOLANT. Refer to «REPLACEMENT - Step 6»(ref-382708-S21361285702011012800000)
64. CHARGE REFRIGERANT See step 2
65. INSTALL COOL AIR INTAKE DUCT SEAL. Refer to «INSTALLATION - Step 135»(ref-382704-S21777018532011012800000)
66. WARM UP ENGINE See step 3
67. CHECK FOR ENGINE COOLANT LEAKS . Refer to «ON-VEHICLE INSPECTION - Step 3»(/lexus/gs/iii-facelift-2007-2011/remont/cooling-system-mechanical/#cooling-inspection)
68. CHECK FOR LEAKAGE OF REFRIGERANT See step 5
69. PERFORM INITIALIZATION Perform initialization Refer to «INITIALIZATION»(ref-382578-S40254115562011012800000). NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
70. CHECK SRS WARNING LIGHT Check SRS warning light Refer to «DIAGNOSIS SYSTEM»(ref-382572-S06363197962011012800000).

Scheme 82

Scheme 83

See also:
• REMOVAL - Step 1
• ON-VEHICLE INSPECTION - Step 3
• REMOVAL - Step 3