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Section 418 (Sliding Roof System - Diagnosis): Pre-Check

WARNING: This page is about a different car, the 2004 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. SLIDING ROOF SYSTEM DESCRIPTION 

    The sliding roof drive gear (sliding roof ECU) monitors switch signals from the sliding roof motor switch using a direct line and drives the motor built into the sliding roof drive gear (sliding roof ECU) according to the switch signals.

  2. DIAGNOSIS SYSTEM 
    1. Inspect the DLC3.
      Fig 1: Inspecting DLC3
      G03487433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The vehicle's ECM uses ISO 9141-2 for communication.

      The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

      TERMINAL CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      7 (Bus+line) - 5 (Signal ground) During communication Pulse generation
      4 (Chassis ground) - Body ground Constant Below 1 Ω
      5 (Signal ground) - Body ground Constant Below 1 Ω
      16 (B+) - Body ground Constant 9 to 14 V

      HINT:

      If the screen displays UNABLE TO CONNECT TO VEHICLE after you have connected the cable of the hand-held tester to the DLC3, turned the ignition switch ON and used the hand-held tester, there is a problem on the vehicle side or tester side.

      • If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
      • If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's manual.
    2. Check the battery voltage

      Standard: 11 to 14 V 

      If the voltage is below 11 V, replace the battery before proceeding.

  3. CHECK DTC 
    1. Connect the hand-held tester to the DLC3.
      2. Fig 2: Connecting Hand-Held Tester To DLC3
      G03487434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch ON.
    3. Read DTCs by following the prompts on the tester screen.

      HINT:

      Refer to the hand-held tester operator's manual for further details.

  4. CLEAR DTC 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. Erase the DTCs following the prompts on the tester screen.

      HINT:

      Refer to the hand-held tester operator's manual for further details.

  5. DATA LIST 

    HINT:

    Using the DATA LIST displayed on the hand-held tester, you can read the value of the switch, sensor, actuator, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the labor time.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. Read the DATA LIST according to the display on the tester.

      Standard (Sliding roof ECU): 

      DATA LIST

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      OPEN SW Sliding roof open switch signal/ON or OFF ON: Sliding roof open switch is pressed
      OFF: Sliding roof open switch is not pressed      		 -
      CLOSE SW Sliding roof open switch signal/ON or OFF ON: Sliding roof close switch is pressed
      OFF: Sliding roof close switch is not pressed      		 -
      UP SW Sliding roof open switch signal/ON or OFF ON: Sliding roof up switch is pressed
      OFF: Sliding roof up switch is not pressed      		 -
      DOWN SW Sliding roof open switch signal/ON or OFF ON: Sliding roof down switch is pressed
      OFF: Sliding roof down switch is not pressed      		 -
      LIMIT SW1 Sliding roof operating signal/ON or OFF ON: Sliding roof motor is operating
      OFF: Sliding roof motor is not operating      		 -
      LIMIT SW2 Sliding roof operating signal/ON or OFF ON: Sliding roof motor is operating
      OFF: Sliding roof motor is not operating      		 -
      MOTOR PULSE Sliding roof operating signal/HI or LO HI: Sliding roof motor is operating
      LO: Sliding roof motor is not operating      		 -
      MOTOR STATUS Sliding roof operating signal/NORMAL or LOCK NORMAL: Sliding roof motor is operating
      LOCK: Sliding roof motor is not operating      		 -
      IG (DIRCT SIG) Ignition switch signal/ON or OFF ON: Ignition switch ON
      OFF: Ignition switch OFF      		 -
      IG (MPX) Ignition switch signal (MPX signal)/ON or OFF ON: Ignition switch ON
      OFF: Ignition switch OFF      		 -
      D-DOOR WARN SW Driver's door courtesy lamp switch signal/ON or OFF ON: Driver's door is open
      OFF: Driver's door is closed      		 -
      KEY OPEN OPERT Key-linked sliding root open signal/ON or OFF ON: Door lock is turned to open position using key
      OFF: Door lock is not turned      		 -
      WIRLES OPN OPRT Wireless sliding roof open signal/ON or OFF ON: Transmitter UNLOCK switch is pressed
      OFF: Transmitter UNLOCK switch is not pressed      		 (1)
      WIRLES CL OPRT Wireless sliding roof close signal/ON or OFF ON: Transmitter LOCK switch is pressed
      OFF: Transmitter LOCK switch is not pressed      		 (1)
      CLOSE SIGNAL Sliding roof position signal/OPEN or CLOSE OPEN: Sliding roof is open
      CLOSE: Sliding roof is fully closed      		 (1)
      KEY OFF PERMS Key-OFF sliding roof operation permit signal/ON or OFF ON: Driver's door is not closed within 45 sec. after ignition switch is turned OFF
      OFF: Any status except "ON" status      		 (1)
      OPEN/DOOR KEY Key-linked sliding roof open permit signal/AVAIL or NOT AVL AVAIL: Driver's door is not closed within 45 sec. after ignition switch is turned OFF
      NOT AVL: Any status except "AVAIL" status      		 (1)
      CLOSE/DOOR KEY Key-linked sliding roof open permit signal/AVAIL or NOT AVL AVAIL: Driver's door is not closed within 45 sec. after ignition switch is turned OFF
      NOT AVL: Any status except "AVAIL" status      		 (1)
      OPEN/WIRELESS Wireless sliding roof open permit signal/AVAIL or NOT AVL AVAIL: No key is in ignition key cylinder and all doors closed
      NOT AVL: Any status except "AVAIL" status      		 (1)
      DOOR KEY OPER Key-linked sliding roof operating direction signal/SLIDE or TILT SLIDE: Slide open direction --> Tilt down direction
      TILT: Slide close direction --> Tilt up direction      		 (1)
      WIRELESS OPER Wireless sliding roof operating direction signal/SLIDE or TILT SLIDE: Slide open direction --> Tilt down direction
      TILT: Slide close direction --> Tilt up direction      		 (1)
      (1) Standard type only
  6. ACTIVE TEST 

    HINT:

    Performing the ACTIVE TEST using the hand-held tester allows you to operate the relay, VSV, actuator, etc. without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten the labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. Perform the ACTIVE TEST according to the display on the tester.

      Standard (Sliding roof ECU): 

      ITEM TEST DETAILS AND DIAGNOSTIC NOTE

      Item Test Details Diagnostic Note
      SLIDE ROOF Operate sliding roof CLOSE/UP Standard type
      SLIDE ROOF Operate sliding roof OPEN/DOWN Standard type
      SLIDE ROOF Operate sliding roof CLOSE Multi-panel moon roof type
      SLIDE ROOF Operate sliding roof OPEN Multi-panel moon roof type
  7. RESET SLIDING ROOF MOTOR (STANDARD TYPE) 
    1. The sliding roof may not operate automatically and the jam protection function will not function correctly after you reconnect, replace or recharge the battery. In any of these cases, reset the sliding roof system using the following method.
      1. Push and hold the slide switch toward the front or tilt switch on the rear side.
      2. Check that the sliding roof will tilt up and down, or slide open and close.
      3. After the slide operation, release the switch.
      4. Make sure that the sliding roof opens and closes automatically.

        HINT:

        If the battery terminal is disconnected, the ECU of the sliding roof motor may not detect the position of the sliding roof. If the AUTO operation function is still disabled even after the sliding roof motor is reset, the hall IC (built in the sliding roof motor assy) for detecting the roof glass position may be malfunctioning.

  8. RESET SLIDING ROOF MOTOR (MULTI-PANEL MOON ROOF TYPE) 
    1. The sliding roof may not operate automatically and the jam protection function will not function correctly after you reconnect, replace or recharge the battery. In any of these cases, reset the sliding roof system using the following method.
      1. Press the sliding roof switch on SLIDE CLOSE or TILT DOWN side and hold it. When the roof glass stops at the fully close position for 1 second, the motor has been reset.

        HINT:

        If the battery terminal is disconnected, the ECU of the sliding roof motor may not detect the position of the roof glass. If the AUTO operation function is still disabled even after the sliding roof motor is reset, the Hall IC (built in the sliding roof motor assy) for detecting the roof glass position may be malfunctioning.

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