Lexus IS250 · Service Manual STEERING

INSTALLATION

Removal / installation


1. INSTALL NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY

  1. C129966E01
    Align the matchmarks on the No. 2 steering intermediate shaft assembly and the steering main shaft.

  1. Install the bolt.

    Torque:
    35 N*m{ 360 kgf*cm , 26 ft.*lbf }


2. INSTALL STEERING COLUMN ASSEMBLY

  1. C115546
    Install the steering column assembly with the 4 nuts.

    Torque:
    21 N*m{ 214 kgf*cm , 16 ft.*lbf }

  1. Connect the connectors and wire harness clamps to the steering column assembly.

  1. C115566
    Install the clamp to the steering column hole shield.

  1. C115549
    Install the brake pedal return spring.


3. INSTALL STEERING SLIDING YOKE SUB-ASSEMBLY

  1. C105567E02
    Align the matchmarks on the No. 2 steering intermediate shaft assembly and steering sliding yoke sub-assembly.

  1. Temporarily install the bolt.

    NOTICE:
    Do not tighten the bolt.

  1. C105528E05
    Align the matchmarks on the steering sliding yoke sub-assembly and the power steering gear assembly.

  1. C115590E02
    Install bolt (A) and tighten the 2 bolts.

    Torque:
    35 N*m{ 360 kgf*cm , 26 ft.*lbf }


4. PLACE FRONT WHEELS FACING STRAIGHT AHEAD

5. INSTALL TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY

  1. C115545
    Install the turn signal switch assembly with spiral cable sub-assembly to the steering column assembly with the clamp.


6. INSTALL STEERING COLUMN COVER

  1. C115544
    Engage the claw to install the upper steering column cover.

  1. Engage the 4 clips to install the steering column cover upper onto the instrument panel cluster finish panel.

  1. C115543
    Engage the 2 claws to install the lower steering column cover.

  1. Install the 2 screws.

    Torque:
    2.0 N*m{ 20 kgf*cm , 18 in.*lbf }


7. ADJUST SPIRAL CABLE SUB-ASSEMBLY

  1. Check that the engine switch is off.

  1. Check that the battery negative (-) terminal is disconnected.

    CAUTION:
    After removing the terminal, wait for at least 90 seconds before starting the operation.

  1. C107193
    Rotate the spiral cable with steering sensor counterclockwise slowly by hand until it feels firm.

    NOTICE:
    Do not turn the spiral cable with steering sensor by the airbag wire harness.

  1. C107194E01
    Rotate the spiral cable with steering sensor clockwise approximately 2.5 turns to align the marks.

    NOTICE:
    Do not turn the spiral cable with spiral sensor by the airbag wire harness.

    HINT:
    The spiral cable with steering sensor will rotate approximately 2.5 turns to both the left and right from the center.


8. INSTALL STEERING WHEEL ASSEMBLY

  1. C115551E01
    Align the matchmarks on the steering wheel assembly and steering main shaft assembly.

  1. Install the steering wheel assembly set nut.

    Torque:
    50 N*m{ 510 kgf*cm , 37 ft.*lbf }


9. INSPECT STEERING WHEEL CENTER POINT

10. INSTALL NO. 1 AIR DUCT

  1. C115550
    Engage the 2 claws to install the No. 1 air duct.


11. INSTALL DRIVER SIDE KNEE AIRBAG ASSEMBLY

  1. C122406
    Connect the connector.

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

  1. Install the driver side knee airbag assembly with the 4 bolts.

    Torque:
    10 N*m{ 102 kgf*cm , 7 ft.*lbf }


12. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY

  1. B123350
    Connect the connectors.

  1. Engage the 7 clips and install the lower instrument panel finish panel sub-assembly.


13. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

  1. B123383E01
    Connect the connectors.

  1. Insert the No. 1 instrument panel under cover sub-assembly into the guide as shown in the illustration.

  1. Engage the 2 claws.

  1. Install the No. 1 instrument panel under cover sub-assembly with the 2 screws <E>.


14. INSTALL INSTRUMENT SIDE PANEL LH

  1. B123384
    Engage the 5 claws and 3 clips, and then install the side instrument panel LH.


15. INSPECT STEERING WHEEL PAD

  1. C122399
    With the steering pad installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the steering pad with a new one:
    1. Cuts, minute cracks or marked discoloration on the steering pad top surface or in the grooved portion.

  1. Make sure that the horn sounds.

    HINT:
    If the horn does not sound, inspect the horn system (Click here).


16. INSTALL STEERING WHEEL PAD

  1. C122394
    Support the steering pad with one hand as shown in the illustration.

  1. Connect the 2 connectors to the steering pad.

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

  1. Connect the horn connector.

  1. Confirm that the circumference groove of the "torx" screw fits in the screw case, and place the steering pad onto the steering wheel assembly.

  1. C122395
    Using a "torx" socket wrench (T30), tighten the 2 "torx" screws.

    Torque:
    8.8 N*m{ 90 kgf*cm , 78 in.*lbf }


17. INSTALL NO. 3 LOWER STEERING WHEEL COVER

  1. C122397
    Install the steering wheel No.3 cover lower.


18. INSTALL NO. 2 LOWER STEERING WHEEL COVER

  1. C122398
    Install the steering wheel No.2 cover lower.


19. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

20. INSPECT SRS WARNING LIGHT

HINT:
Click here


21. PERFORM INITIALIZATION

HINT:
Some systems need initialization when disconnecting the cable from the negative battery terminal (Click here).

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