Lexus IS250 IS220d GSE20 ALE20 - SUPPLEMENTAL RESTRAINT SYSTEM

SEAT POSITION SENSOR - INSTALLATION

1. INSTALL SEAT POSITION SENSOR (for Power Seat)

Check that the engine switch is off.

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

  • CAUTION:
  • After disconnecting the negative battery terminal, wait for at least 90 seconds before starting the operation.
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Using a feeler gauge 1 mm (0.039 in.), install the seat position sensor.

  • NOTICE:
If the seat position sensor has been dropped, or there are any cracks, dents or other defects in the case or connector, replace the seat position sensor with a new one.
When installing the seat position sensor, be careful that the SRS wiring does not interfere with other parts and that it is not pinched between other parts.
  • HINT:
  • Be sure that a clearance between the seat position sensor and the seat rail is within 0.6 mm (0.023 in.) to 1.4 mm (0.055 in.).

Using a "torx" socket wrench (T30), tighten the "torx" screw to install the seat position sensor.

  • Torque:
  • 8.0 N*m{ 82 kgf*cm, 71 in.*lbf}

Make sure that a clearance between the seat position sensor and the seat rail is within 0.6 mm (0.023 in.) to1.4 mm (0.055 in.).

Check that there is no looseness in the installation parts of the seat position sensor.

Connect the connector.

Install the seat slide position sensor protector to the seat position sensor.

2. INSTALL SEAT POSITION SENSOR (for Manual Seat)

Check that the engine switch is off.

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

  • NOTICE:
  • After disconnecting the negative battery terminal, wait for at least 90 seconds before starting the operation.
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Using a feeler gauge 1 mm (0.039 in.), install the seat position sensor.

  • NOTICE:
If the seat position sensor has been dropped, or there are any cracks, dents or other defects in the case or connector, replace the seat position sensor with a new one.
When installing the seat position sensor, be careful that the SRS wiring does not interfere with other parts and that it is not pinched between other parts.
  • HINT:
  • Be sure that a clearance between the seat position sensor and the seat rail is within 0.6 mm (0.023 in.) to 1.4 mm (0.055 in.).

Using a "torx" socket wrench (T30), tighten the "torx" screw to install the seat position sensor.

  • Torque:
  • 8.0 N*m{ 82 kgf*cm, 71 in.*lbf}

Make sure that a clearance between the seat position sensor and the seat rail is within 0.6 mm (0.023 in.) to1.4 mm (0.055 in.).

Check that there is no looseness in the installation parts of the seat position sensor.

Connect the connector.

Install the seat slide position sensor protector to the seat position sensor.

3. INSTALL FRONT SEAT ASSEMBLY (for Power Seat)

Place the seat in the cabin.

Connect the connectors under the seat.

Connect the cable to the negative (-) battery terminal.

Operate the power seat switch knob and move the seat to the position farthest forward.

Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Tighten the 2 bolts on the rear seat track bracket.

  • Torque:
  • 37 N*m{ 377 kgf*cm, 27 ft.*lbf}
  • HINT:
  • Tighten the 2 bolts in the order indicated in the illustration.

Operate the power seat switch knob and move the seat to the rearmost position.

Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Tighten the 2 bolts on the rear seat track bracket.

  • Torque:
  • 37 N*m{ 377 kgf*cm, 27 ft.*lbf}
4. INSTALL FRONT REAR INNER SEAT TRACK COVER LH (for Power Seat)
5. INSTALL FRONT REAR OUTER SEAT TRACK COVER LH (for Power Seat)
6. INSTALL FRONT INNER SEAT TRACK COVER LH (for Power Seat)
7. INSTALL FRONT OUTER SEAT TRACK COVER LH (for Power Seat)
8. INSTALL FRONT SEAT CUSHION SHIELD (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the claw and install the seat cushion shield lower LH.

9. INSTALL RECLINING ADJUSTER RELEASE HANDLE (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the claw and install the reclining adjuster release handle.

10. INSTALL VERTICAL ADJUSTING HANDLE (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Install the vertical adjusting handle with the 2 screws.

11. INSTALL VERTICAL SEAT ADJUSTER KNOB CAP (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the 3 claws and install the vertical seat adjuster knob cap.

12. INSTALL VERTICAL SEAT ADJUSTER KNOB (for Manual Seat)
13. INSTALL FRONT SEAT ASSEMBLY (for Manual Seat)

Place the front seat assembly in the vehicle and align the adjuster pin with the hole on the vehicle side.

  • NOTICE:
  • When installing the passenger side front seat assembly, be careful not to step on the yaw rate sensor mounted on the floor under the seat.

Connect the connector.

Move the front seat assembly to the rearmost position by operating the slide handle.

  • NOTICE:
  • Check that the seat is locked.
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Temporarily install the front seat track bracket with the 2 bolts.

Move the front seat assembly fully forward by operating the slide handle.

  • NOTICE:
  • Check that the seat is locked.
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Temporarily install the rear seat track bracket with the 2 bolts.

Move the front seat assembly to the rearmost position by operating the slide handle.

  • NOTICE:
  • Check that the seat is locked.

Fully tighten the 2 bolts on the front seat track bracket in the order of the inner side bolt and then the outer side bolt.

  • Torque:
  • 37 N*m{ 377 kgf*cm, 27 ft.*lbf}

Move the front seat assembly fully forward by operating the slide handle.

  • NOTICE:
  • Check that the seat is locked.

Fully tighten the 2 bolts on the rear seat track bracket in the order of the inner side bolt and then the outer side bolt.

  • Torque:
  • 37 N*m{ 377 kgf*cm, 27 ft.*lbf}
14. INSTALL REAR INNER SEAT TRACK BRACKET COVER (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the 2 claws and install the rear inner seat track bracket cover.

15. INSTALL REAR OUTER SEAT TRACK BRACKET COVER (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the 2 claws and install the rear outer seat track bracket cover.

16. INSTALL FRONT INNER SEAT TRACK BRACKET COVER (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the 2 claws and install the front inner seat track bracket cover.

17. INSTALL FRONT OUTER SEAT TRACK BRACKET COVER (for Manual Seat)
Seat Position Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Engage the 2 claws and install the front outer seat track bracket cover.

18. INSTALL FRONT SEAT HEADREST ASSEMBLY
19. CONNECT BATTERY NEGATIVE TERMINAL (for Manual Seat)
20. PERFORM INITIALIZATION

Perform initialization .

  • HINT:
  • Some systems need initialization when disconnecting the cable from the negative battery terminal.
21. INSPECT FRONT SEAT ASSEMBLY (for Power Seat)

Check the power seat operation.

Check the seat heater operation (with seat heater system).

Turn the engine switch on (IG).

Turn the seat heater switch ON.

Wait 5 minutes or more and confirm that the seat surface becomes warm.

22. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (for Manual Seat)
23. INSPECT SRS WARNING LIGHT

Inspect the SRS warning light .