Lexus IS250 · Service Manual BODY

INITIALIZATION

Troubleshooting


RESET SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY

NOTICE:
After the sliding roof drive gear is replaced, the pulse sensor of the sliding roof drive gear needs to be initialized. If a reset is not executed, the sliding roof cannot be tilted or controlled by turning the switch to position [2] to [8].

  1. Turn the engine switch on (IG).

  2. Keep the sliding roof switch in the fully closed position and the push switch pushed until the following operations from (1) to (3) are completed:

    1. The sliding roof moves to the tilt fully open position and remains for 1 second.

    2. Tilt down operation starts. After the roof is fully closed, it starts sliding to open.

    3. B131069E01
      After the roof slides to the fully open operation, the operation stops and then the roof closes to the fully closed position.
      Switch Position
      		 Sliding Roof Position
      1
      		 Over stroke position
      2
      		 Slide fully open position (Comfort stop position)
      3
      		 Slide stop position [1]
      4
      		 Slide stop position [2]
      5
      		 Slide stop position [3]
      6
      		 Slide stop position [4]
      7
      		 Slide stop position [5]
      8
      		 Slide stop position [6]
      9
      		 Slide fully close position
      10
      		 Tilt fully open position
      11
      		 Auto fully closed, comfort stop position

  3. Check that the operation works normally with AUTO operation.

NOTICE:
  1. If voltage changes during initialization, the sliding roof ECU may not be initialized normally.
  2. Do not apply excessive loads to the vehicle during initialization by performing operations such as locking the doors or cranking the engine.
  3. Do not move the vehicle during initialization.
  4. Do not apply strong impacts to the vehicle during initialization by performing operations such as closing the doors forcefully.


RESET FAIL-SAFE FUNCTION

HINT:
When the sliding roof cannot be fully closed.

  1. If the jam protection function is operated repeatedly, the fail-safe function will not activate. To return to the normal condition, push the sliding roof switch assembly at position [11] for 10 seconds or more.


FORCED LEANING OPERATION

HINT:
Resetting the stored position of the sliding roof.

  1. The position of the sliding roof is stored in EEPROM. Even after the battery is removed, the sliding roof position remains stored. In order to reset the position, perform the following steps:

    1. Fully close the sliding roof.

    2. Quickly turn the sliding roof switch assembly to position 1. (Within 0.5 seconds of step 1)

    3. Hold the sliding roof switch assembly at position [1] for 10 seconds or more to enter the leaning operation mode.

    4. Perform initialization procedure.

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