Lexus IS250 · Service Manual HEATER & AIR CONDITIONING SYSTEM

REMOVAL

Removal / installation

1. ALIGN FRONT WHEELS FACING STRAIGHT AHEAD

2. REMOVE COOL AIR INTAKE DUCT SEAL

Using a clip remover, remove the 11 clips and cool air intake duct seal.

3. REMOVE ENGINE ROOM SIDE COVER LH

Remove the 5 clips and side cover.

4. REMOVE ENGINE ROOM SIDE COVER RH

Remove the 2 clips and side cover.

5. DISCHARGE REFRIGERANT FROM REFRIGERATION

Start up the engine.

Turn the A/C switch on.

Operate the cooler compressor at an engine rpm of approximately 1,000 for 5 to 6 minutes to circulate the refrigerant and collect compressor oil remaining in each component into the cooler compressor as much as possible.

Stop the engine.

Using SST, let the refrigerant gas out.

SST

07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080)

6. DISCONNECT CABLE FROM NEGATIVE BATTERY

CAUTION:
: Wait for 90 seconds after disconnecting the cable to prevent airbag deployment (Click here)

7. REMOVE FRONT UPPER FENDER PROTECTOR LH

Using a clip remover, separate the clip on the rubber portion of the cowl top ventilator louver sub-assembly from the front upper fender protector LH.

Disengage the 3 clips and the claw to remove the front fender protector upper LH.

8. REMOVE FRONT UPPER FENDER PROTECTOR RH

HINT:
: Use the same procedures for the RH side and the LH side.

9. REMOVE ROOF DRIP SIDE FINISH MOULDING LH

Put protective tape around the roof drip side finish moulding.

Using a moulding remover, disengage the 6 clips and remove the roof drip side finish moulding.
NOTICE:
1. Do not remove the clips.
2. If the clips are damaged or fall off, replace them with new clips.

10. REMOVE ROOF DRIP SIDE FINISH MOULDING RH

HINT:
: Use the same procedures for the RH side and the LH side.

11. REMOVE FRONT WIPER ARM HEAD CAP

Using a screwdriver, remove the front wiper arm head cap.
HINT:
1. Use the same procedures for the RH side and the LH side.
2. Tape the screwdriver tip before use.

12. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY LH

Remove the nut and the front wiper arm and blade assembly LH.

13. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY RH

Remove the nut and the front wiper arm and blade assembly RH.

14. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY

Remove the 2 clips.

Disengage the 11 claws, and pull out the cowl top ventilator louver sub-assembly.

15. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY

Disconnect the 2 connectors.

Remove the 2 bolts.

Disengage the rubber pin of the windshield wiper motor from the vehicle body as shown in the illustration. Remove the windshield wiper motor and link assembly.

16. SEPARATE SUCTION PIPE SUB-ASSEMBLY

Remove the bolt, and slide the hook connector.

Disconnect the suction pipe sub-assembly.

Remove the O-ring from the suction pipe sub-assembly.

NOTICE:

Seal the openings of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.

17. SEPARATE LIQUID TUBE SUB-ASSEMBLY

Disconnect the liquid tube sub-assembly.

Remove the O-ring from the liquid tube sub-assembly.

NOTICE:

Seal the openings of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.

18. REMOVE HEATER WATER OUTLET HOSE

Using pliers, grip the claws of the clip and slide the clip to disconnect the heater water outlet hose.

19. REMOVE HEATER WATER INLET HOSE

HINT:
: Disconnection of the heater water outlet hose is the same as for the heater water inlet hose.

20. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (for Automatic Transmission)

Turn the shift lever knob counterclockwise and remove the shift lever knob sub-assembly.

21. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (for Manual Transmission)

Turn the shift lever knob counterclockwise and remove the shift lever knob sub-assembly.

22. REMOVE UPPER NO. 1 CONSOLE PANEL GARNISH (for Automatic Transmission)

Using a moulding remover, disengage the claw.

Pull the upper No. 1 console panel garnish in the direction indicated by the arrow to disengage the 2 clips and remove it.

23. REMOVE UPPER NO. 2 CONSOLE PANEL GARNISH (for Automatic Transmission)

Using a moulding remover, disengage the claw.

Pull the upper No. 2 console panel garnish in the direction indicated by the arrow to disengage the 2 clips and remove it.

24. REMOVE CONSOLE PANEL SUB-ASSEMBLY (for Automatic Transmission)

Disengage the 8 clips.

Disconnect the connectors and remove the console panel sub-assembly.

25. REMOVE REAR CONSOLE PANEL SUB-ASSEMBLY (for Manual Transmission)

Open the snap.

Disengage the 7 claws and 2 clips, and then remove the rear console panel sub-assembly.

26. REMOVE FRONT CONSOLE PANEL SUB-ASSEMBLY (for Manual Transmission)

Open the snap.

Pull the front console panel sub-assembly in the direction indicated by the arrow to disengage the 6 clips and remove it.

27. REMOVE FRONT ASH RECEPTACLE SUB-ASSEMBLY

Remove the 2 screws <F>.

Pull the front ash receptacle sub-assembly in the direction indicated by the arrow to disconnect the connectors and remove it.

28. REMOVE CONSOLE BOX REGISTER ASSEMBLY

Remove the rear ash receptacle assembly.

Disengage the 2 claws and 4 clips, and then remove the console box register assembly.

29. REMOVE CONSOLE BOX

Remove the 2 bolts <C>.

Disconnect the 2 connectors.

Disengage the 2 clamps.

Remove the 2 bolts <C>.

Disconnect the connector.

Remove the 2 bolts <C>.

Disengage the 2 claws and 2 clips, and then remove the console box.

30. REMOVE NO. 3 INSTRUMENT PANEL REGISTER ASSEMBLY

Using a screwdriver, disengage the 4 claws.

HINT:

Tape the screwdriver tip before use.

Apply protective tape to the areas shown in the illustration.

Using a moulding remover, disengage the 4 claws starting from the right of the No. 3 instrument panel register assembly. Disengage the remaining 3 claws by pulling the No. 3 instrument panel register assembly by hand.

NOTICE:

Do not pry the lower part of the No. 3 instrument panel register assembly. Doing so may damage the assembly.

Disconnect the connectors.

31. REMOVE CENTER LOWER INSTRUMENT CLUSTER FINISH PANEL

Disengage the 4 claws and remove the center lower instrument cluster finish panel.

32. REMOVE MULTI-DISPLAY WITH RADIO RECEIVER ASSEMBLY (w/ Navigation System)

Remove the 4 bolts.

Pull the multi-display w/ radio receiver assembly toward the rear of the vehicle.

Disconnect each connector and remove the multi-display.

33. REMOVE INTEGRATION CONTROL PANEL WITH RADIO RECEIVER ASSEMBLY (w/o Navigation System)

Remove the 4 bolts.

Pull the integration control panel w/ radio receiver assembly toward the rear of the vehicle.

Disconnect each connector and remove the panel.

34. REMOVE LOWER NO. 2 STEERING WHEEL COVER

Using a screwdriver, remove the steering wheel No.2 cover lower.

HINT:

Tape up the screwdriver tip before use.

35. REMOVE LOWER NO. 3 STEERING WHEEL COVER

Using a screwdriver, remove the steering wheel No.3 cover lower.

HINT:

Tape up the screwdriver tip before use.

36. REMOVE STEERING PAD

Using a "torx" socket wrench (T30), loosen the 2 "torx" screws until the groove along the screw circumference catches on the screw case.

Pull out the steering pad from the steering wheel assembly and support the steering pad with one hand as shown in the illustration.

NOTICE:

When removing the steering pad, do not pull the airbag wire harness.

Disconnect the horn connector.

Disconnect the 2 connectors from the steering pad.

NOTICE:

When handling the airbag connector, take care not to damage the airbag wire harness.

Remove the steering pad.

37. REMOVE STEERING WHEEL ASSEMBLY

Remove the steering wheel assembly set nut.

Put matchmarks on the steering wheel assembly and main shaft assembly.

Using SST, remove the steering wheel assembly.

SST

09950-50013 (09951-05010, 09952-05010, 09953-05020, 09954-05011)

38. REMOVE STEERING COLUMN COVER (for Power Tilt and Power Telescopic)

Remove the 3 screws.

Disengage the 2 claws to remove the steering column cover lower.

NOTICE:

Do not damage the tilt and telescopic switch.

Disengage the 4 clips to separate the steering column cover upper.

Disengage the claw to remove the steering column cover upper.

39. REMOVE STEERING COLUMN COVER (for Manual Tilt and Telescopic)

Remove the 2 screws.

Disengage the 2 claws to remove the lower steering column cover.

Disengage the 4 clips to separate the steering column cover upper.

Disengage the claw to remove the upper steering column cover.

40. REMOVE TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY

Disconnect the connectors from the turn signal switch assembly with spiral cable sub-assembly.

Using pliers, grip the claws of the clip and remove the turn signal switch assembly with spiral cable sub-assembly from the steering column assembly.

41. REMOVE FRONT DOOR SCUFF PLATE LH (w/o Illumination)

Put protective tape around the front door scuff plate.

Using a moulding remover, disengage the 4 clips.

Disengage the 7 claws and remove the front door scuff plate LH.

42. REMOVE FRONT DOOR SCUFF PLATE LH (w/ Illumination)

Put protective tape around the front door scuff plate.

Using a moulding remover, disengage the 4 clips.

Disengage the 7 claws and remove the front door scuff plate LH.

Disconnect the connector.

43. REMOVE FRONT DOOR OPENING TRIM COVER LH

Disengage the 6 claws and remove the front door opening trim cover LH.

44. REMOVE SIDE INSTRUMENT PANEL LH

Using a moulding remover, disengage the 5 claws and 3 clips, and then remove the side instrument panel LH.

45. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

Remove the 2 screws <E>.

Push the 2 claws in the direction indicated by the arrow to disengage them.

Remove the No. 1 instrument panel under cover sub-assembly from the guide as shown in the illustration and pull the cover toward the rear of the vehicle.

Disconnect the connectors and remove the No. 1 instrument panel under cover sub-assembly.

46. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY

Disengage the 7 clips.

Disconnect the connectors and remove the lower instrument panel finish panel sub-assembly.

47. REMOVE DRIVER SIDE KNEE AIRBAG ASSEMBLY

Remove the 4 bolts and driver side knee airbag assembly.

Disconnect the connector.

NOTICE:

When handling the airbag connector, take care not to damage the airbag wire harness.

48. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY

Remove the 2 screws <G> and 2 clips, and then remove the instrument cluster finish panel sub-assembly.

49. REMOVE COMBINATION METER ASSEMBLY

Using a screwdriver, disengage the 2 claws.

HINT:

Tape the screwdriver tip before use.

Disconnect the connectors and remove the combination meter assembly.

50. REMOVE FRONT DOOR SCUFF PLATE RH (w/o Illumination)

HINT:
: Use the same procedures for the RH side and the LH side.

51. REMOVE FRONT DOOR SCUFF PLATE RH (w/ Illumination)

HINT:
: Use the same procedures for the RH side and the LH side.

52. REMOVE FRONT DOOR OPENING TRIM COVER RH

Disengage the 6 claws and remove the front door opening trim cover RH.

53. REMOVE SIDE INSTRUMENT PANEL RH

Using a moulding remover, disengage the 5 claws and 3 clips, and then remove the side instrument panel RH.

54. REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

Using a moulding remover, disengage the 4 clips and remove the No. 2 instrument panel under cover sub-assembly.

55. REMOVE FRONT PASSENGER SIDE KNEE AIRBAG ASSEMBLY

Remove the 3 bolts and front passenger side knee airbag assembly.

Disconnect the connector.

NOTICE:

When handling the airbag connector, take care not to damage the airbag wire harness.

56. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY

Remove the 5 screws <E>.

Disengage the 2 claws.

Disconnect the connectors and remove the glove compartment door assembly.

57. REMOVE FRONT PILLAR GARNISH LH

Disengage the 2 clips from the vehicle body.

Cut off the clip <A>.

Disengage the claw and remove the front pillar garnish LH.

Remove the clip <A> from the vehicle body.

Protect the curtain shield airbag assembly.
1. Thoroughly cover the airbag with a cloth or nylon sheet and fix the ends of the cover with adhesive tape, as shown in the illustration.
  
  NOTICE:
  
  Cover the curtain shield airbag with a protective cover as soon as the front pillar garnish is removed.

58. REMOVE FRONT PILLAR GARNISH RH

HINT:
: Use the same procedures for the RH side and the LH side.

59. REMOVE NO. 1 INSTRUMENT PANEL REGISTER ASSEMBLY

Pull the No. 1 instrument panel register assembly in the direction indicated by the arrow to disengage the 7 claws and 2 clips, and then disconnect the connector and remove it.

60. REMOVE NO. 2 INSTRUMENT PANEL REGISTER ASSEMBLY

Pull the No. 2 instrument panel register assembly in the direction indicated by the arrow to disengage the 4 claws and 2 clips, and then disconnect the connector and remove it.

61. REMOVE NO. 3 INSTRUMENT PANEL SPEAKER PANEL SUB-ASSEMBLY

Using a screwdriver, disengage the 7 claws and remove the No. 3 instrument panel speaker panel sub-assembly.

HINT:

Tape the screwdriver tip before use.

62. REMOVE FRONT STEREO COMPONENT SPEAKER ASSEMBLY (w/ Front Center Speaker)

Remove the 2 bolts.

Lift the front stereo component speaker assembly and disconnect the connector to remove the speaker assembly.

NOTICE:

Do not touch the cone part of the speaker.

63. REMOVE NO. 2 CONSOLE BOX DUCT (for Automatic Transmission)

Remove the 2 clips and No. 2 console box duct.

64. REMOVE NO. 1 CONSOLE BOX DUCT (for Automatic Transmission)

Remove the clip and No. 1 console box duct.

65. REMOVE NO. 2 CONSOLE BOX DUCT (for Manual Transmission)

Remove the clip and No. 2 console box duct.

66. DISCONNECT PASSENGER AIRBAG CONNECTOR

67. REMOVE INSTRUMENT PANEL SAFETY PAD ASSEMBLY

Disengage the clamps.

Disconnect the connectors.

Disengage the 2 claws and separate the cooler thermistor.

Remove the 6 bolts <D> and nut <H>.

Remove the 2 passenger airbag bolts <A> or <B>.

Disengage the 2 clamps.

Disengage the 5 claws and remove the instrument panel safety pad assembly.

68. REMOVE NO. 1 AIR DUCT

Disengage the 2 claws and remove the No. 1 air duct.

69. REMOVE STEERING SLIDING YOKE SUB-ASSEMBLY (for 2WD)

Loosen bolt (A) and remove bolt (B), then slide the steering sliding yoke sub-assembly.
NOTICE:
1. Do not remove the bolt (A).
2. Do not separate the steering sliding yoke sub-assembly from the power steering gear assembly.

Put matchmarks on the steering sliding yoke sub-assembly and the power steering gear assembly.

Separate the steering sliding yoke sub-assembly from the power steering gear assembly.

Put matchmarks on the steering sliding yoke sub-assembly and the No. 2 steering intermediate shaft assembly.

Remove the bolt and the steering sliding yoke sub-assembly from the No. 2 steering intermediate shaft assembly.

70. REMOVE STEERING COLUMN ASSEMBLY (for Manual Tilt)

Remove the brake pedal return spring.

Remove the clamp from the steering column hole shield.

Disconnect the connectors and wire harness clamps from the steering column assembly.

Remove the 4 nuts and steering column assembly.

71. REMOVE STEERING COLUMN ASSEMBLY (for Power Tilt and Power Telescopic)

Remove the clamp from the steering column hole shield.

Disconnect the connectors and wire harness clamps from the steering column assembly.

Remove the 4 nuts and steering column assembly.

72. REMOVE DEFROSTER NOZZLE LOWER ASSEMBLY

Release the 4 claws and remove the defroster nozzle lower assembly.

73. REMOVE IMMOBILISER CODE ECU

74. REMOVE INSTRUMENT PANEL REINFORCEMENT ASSEMBLY

Remove the 27 clamps and 19 connectors, and then disconnect the wire harness.

Remove the 2 nuts, 2 bolts and 2 junction blocks.

Remove the cap and bolt.

Remove the 3 bolts and nut.

Using a T40 "torx" socket, remove the 5 "torx" bolts.

NOTICE:

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.

75. REMOVE AIR CONDITIONER UNIT ASSEMBLY

Remove the 2 screws, 3 bolts, and air conditioner unit assembly.

76. REMOVE NO. 2 AIR DUCT

Remove the screw and No. 2 air duct.

77. REMOVE AIR CONDITIONING AMPLIFIER ASSEMBLY

Disconnect the connector.

Remove the screw and air conditioning amplifier assembly.

78. REMOVE BLOWER ASSEMBLY

Disconnect the connector.

Remove the screw.

Release the claw and remove the blower assembly.