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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Sliding Roof) >> Sliding Roof System >> Sliding Roof does not Move by Operating Sliding Roof Control Switch >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When the sliding roof drive gear sub-assembly (sliding roof ECU) is reinstalled or replaced, the sliding roof drive gear sub-assembly must be initialized (See INITIALIZATION  ).
  1. PERFORM ACTIVE TEST USING TECHSTREAM (SLIDING ROOF OPERATION) 
    1. Connect the Techstream to the DLC3
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Sliding Roof / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Sliding Roof 

      SLIDING ROOF SPECIFICATION

      Tester Display Test Part Control Range Diagnostic Note
      Slide Roof Operate sliding roof CLOS/UP / OFF -
      Slide Roof Operate sliding roof OPN/DWN / OFF -

      OK: Sliding roof operates normally. 

    NG: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)  (See REMOVAL  )

    OK: Go to next step 

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Sliding Roof / Data List.
    5. Read the Data List according to the display on the Techstream.

      Sliding Roof 

      SLIDING ROOF SPECIFICATION

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Hall IC1 Pulse Sliding roof operation signal/LO or HI LO Sliding roof motor is not operating
      HI Sliding roof motor is operating      		 -
      Hall IC1 Status Sliding roof operation signal/ NORMAL or LOCK NORMAL Sliding roof motor is operating
      LOCK Sliding roof motor is not operating      		 -
      Hall IC2 Pulse Sliding roof operation signal/LO or HI LO Sliding roof motor is not operating
      HI Sliding roof motor is operating      		 -
      Hall IC2 Status Sliding roof operation signal/ NORMAL or LOCK NORMAL Sliding roof motor is operating
      LOCK Sliding roof motor is not operating      		 -

    NG: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)  (See REMOVAL  )

    OK: Go to next step 

  3. INSPECT FUSE 
    1. Remove the S/ROOF and ECU-IG LH fuses from cowl side junction block LH.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      S/ROOF fuse Always Below 1 Ω
      ECU-IG LH fuse Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY, BODY GROUND) 
    1. Disconnect the R6 ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      R6-5 (B) - Body ground Always 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      R6-7 (E) - Body ground Always Below 1 Ω
      4. Fig 1: Identifying R6 ECU Connector
      G05755875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - LH-IG2 RELAY) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      R6-6 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      R6-6 (IG) - Body ground Engine switch off Below 1 V
      2. Fig 2: Identifying R6 ECU Connector
      G05755876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step  8

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - SLIDING ROOF SWITCH ASSEMBLY) 
    1. Disconnect the R5 switch connector
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      R6-2 (CHK) - R5-7 (CHK) Always Below 1 Ω
      R6-8 (CLS) - R5-10 (CLS) Always Below 1 Ω
      R6-9 (OPN) - R5-11 (OPN) Always Below 1 Ω
      R6-4 (DWN) - RS-8 (DOWN) Always Below 1 Ω
      R6-3 (UP) - R5-9 (UP) Always Below 1 Ω
      R5-39 (GND) - Body ground Always Below 1 Ω
      R6-2 (CHK) - Body ground Always 10 kΩ or higher
      R6-8 (CLS) - Body ground Always 10 kΩ or higher
      R6-9 (OPN) - Body ground Always 10 kΩ or higher
      R6-4 (DWN) - Body ground Always 10 kΩ or higher
      R6-3 (UP) - Body ground Always 10 kΩ or higher
      3. Fig 3: Identifying R5 Switch Connector
      G05755877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. INSPECT MAP LIGHT ASSEMBLY (SLIDING ROOF SWITCH ASSEMBLY) 
    1. Remove the map light assembly (sliding roof switch assembly) (See SLIDING ROOF SWITCH ASSEMBLY  )
      Fig 4: Identifying Sliding Roof Switch Assembly With Switch Condition
      G05755878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      R5-8 (DOWN) - R5-39 (GND) 1 Below 100 Ω
      R5-9 (UP) - R5-39 (GND) 1 1 kΩ or higher
      R5-10 (CLS) - R5-39 (GND) 1 1 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) 1 1 kΩ or higher
      R5-8 (DOWN) - R5-39 (GND) 2 Below 100 Ω
      R5-9 (UP) - R5-39 (GND) 2 Below 100 Ω
      R5-10 (CLS) - R5-39 (GND) 2 1 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) 2 1 kΩ or higher
      R5-8 (DOWN) - R5-39 (GND) 3 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 3 Below 100 Ω
      R5-10 (CLS) - R5-39 (GND) 3 1 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) 3 1 kΩ or higher
      R5-8 (DOWN) - R5-39 (GND) 4 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 4 Below 100 Ω
      R5-10 (CLS) - R5-39 (GND) 4 1 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) 4 Below 100 Ω
      R5-8 (DOWN) - R5-39 (GND) 5 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 5 1 kΩ or higher
      R5-10 (CLS) - R5-39 (GND) 5 1 kΩ or higher
      R5-11 (OPN) - R5-39 (GND) 5 Below 100 Ω
      R5-8 (DOWN) - R5-39 (GND) 6 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 6 1 kΩ or higher
      R5-10 (CLS) - R5-39 (GND) 6 Below 100 Ω
      R5-11 (OPN) - R5-39 (GND) 6 Below 100 Ω
      R5-8 (DOWN) - R5-39 (GND) 7 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 7 Below 100 Ω
      RS-10 (CLS) - R5-39 (GND) 7 Below 100 Ω
      R5-11 (OPN) - R5-39 (GND) 7 Below 100 Ω
      R5-8 (DOWN) - R5-39 (GND) 8 1 kΩ or higher
      R5-9 (UP) - R5-39 (GND) 8 Below 100 Ω
      R5-10 (CLS) - R5-39 (GND) 8 Below 100 Ω
      R5-11 (OPN) - R5-39 (GND) 8 1 kΩ or higher
      R5-8 (DOWN) - R5-39 (GND) 9 Below 100 Ω
      R5-9 (UP) - R5-39 (GND) 9 Below 100 Ω
      R5-10 (CLS) - R5-39 (GND) 9 Below 100 Ω
      R5-11 (OPN) - R5-39 (GND) 9 1 kΩ or higher
      R5-8 (DOWN) - R5-39 (GND) 10 Below 100 Ω
      R5-9 (UP) - R5-39 (GND) 10 1 kΩ or higher
      R5-10 (CLS) - R5-39 (GND) 10 Below 100 Ω
      R5-11 (OPN) - R5-39 (GND) 10 1 kΩ or higher
      R5-7 (CHK) - R5-39 (GND) 11 Below 100 Ω

    NG: REPLACE MAP LIGHT ASSEMBLY (SLIDING ROOF SWITCH ASSEMBLY)  (See SLIDING ROOF SWITCH ASSEMBLY  )

    OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)  (See REMOVAL  )

  8. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - LH-IG2 RELAY) 
    1. Disconnect the R5 switch connector
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      R5-21 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      R5-21 (IG) - Body ground Engine switch off Below 1 V
      3. Fig 5: Identifying R5 Connector Terminal
      G05755879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - SLIDING ROOF SWITCH ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      R6-6 (IG) - R5-24 (IG3) Always Below 1 Ω
      R6-6 (IG) - Body ground Always 10 kΩ or higher
      2. Fig 6: Identifying R5 And R6 Connector Terminal
      G05755880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAP LIGHT ASSEMBLY (SLIDING ROOF SWITCH ASSEMBLY)  (See SLIDING ROOF SWITCH ASSEMBLY  )

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