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Home >> Lexus >> 2010 >> IS 250C Automatic >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B2543: Abnormal Difference between RH and LH Luggage Door Drive Motor Pulse >> Procedure

DTC B2543: Abnormal Difference between RH and LH Luggage Door Drive Motor Pulse: Procedure

  1. READ VALUE USING TECHSTREAM (LUGGAGE PULSE/RH VALUE, LUGGAGE PULSE/LH VALUE) 
    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 / Retractable Hardtop / Data List.
    5. Read the Data List according to the display on the Techstream.
      RETRACTABLE HARDTOP (SLIDING ROOF CONTROL ECU ASSEMBLY)

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Luggage Pulse/Rh Value Luggage motor RH pulse/Min.: -4000, Max.: 4000 -4000 to 4000 -
      Luggage Pulse/Lh Value Luggage motor LH pulse/Min.: -4000, Max.: 4000 -4000 to 4000 -

      OK

      The Techstream display changes according to condition as shown in the table.

    NG → See step   2 

    OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

  2. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR HINGE RH - SLIDING ROOF CONTROL ECU) 
    1. Disconnect the P59 and P53 connectors.
      Fig 1: Identifying P59 & P53 Connectors
      GTY257409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P59-6 (LPRB) - P53-12 (LPRB) Always Below 1 Ω
      P59-5 (LPR) - P53-15 (LPR) Always Below 1 Ω
      P59-4 (LPRE) - P53-31 (LPRE) Always Below 1 Ω
      P53-12 (LPRB) - P53-31 (LPRE) Always 10 kΩ or higher
      P53-15 (LPR) - P53-31 (LPRE) Always 10 kΩ or higher
      P53-12 (LPRB) - Body ground Always 10 kΩ or higher
      P53-15 (LPR) - Body ground Always 10 kΩ or higher
      P53-31 (LPRE) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Luggage Compartment Door Hinge Assembly RH)
      *2 Front view of wire harness connector
      (to Sliding Roof Control ECU Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK LUGGAGE COMPARTMENT DOOR HINGE ASSEMBLY RH (HARNESS AND CONNECTOR) 
    1. Disconnect the P59 and A connectors.
      Fig 2: Identifying P59 & A Connectors
      GTY255203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P59-6 (LPRB) - A-6 Always Below 1 Ω
      P59-5 (LPR) - A-5 Always Below 1 Ω
      P59-4 (LPRE) - A-4 Always Below 1 Ω
      P59-6 (LPRB) - Body ground Always 10 kΩ or higher
      P59-5 (LPR) - Body ground Always 10 kΩ or higher
      P59-4 (LPRE) - Body ground Always 10 kΩ or higher
      P59-6 (LPRB) - P59-4 (LPRE) Always 10 kΩ or higher
      P59-5 (LPR) - P59-4 (LPRE) Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Luggage Compartment Door Hinge Assembly RH)

    NG → REPLACE LUGGAGE COMPARTMENT DOOR HINGE ASSEMBLY RH (HARNESS OR CONNECTOR) 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR HINGE LH - SLIDING ROOF CONTROL ECU) 
    1. Disconnect the Q43 and Q35 connectors.
      Fig 3: Identifying Q43 & Q35 Connectors
      GTY261184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q43-6 (LPLB) - Q35-15 (LPLB) Always Below 1 Ω
      Q43-5 (LPL) - Q35-23 (LPL) Always Below 1 Ω
      Q43-4 (LPLE) - Q35-12 (LPLE) Always Below 1 Ω
      Q35-15 (LPLB) - Q35-12 (LPLE) Always 10 kΩ or higher
      Q35-23 (LPL) - Q35-12 (LPLE) Always 10 kΩ or higher
      Q35-15 (LPLB) - Body ground Always 10 kΩ or higher
      Q35-23 (LPL) - Body ground Always 10 kΩ or higher
      Q35-12 (LPLE) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Luggage Compartment Door Hinge Assembly LH)
      *2 Front view of wire harness connector
      (to Sliding Roof Control ECU Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK LUGGAGE COMPARTMENT DOOR HINGE ASSEMBLY LH (HARNESS AND CONNECTOR) 
    1. Disconnect the Q43 and B connectors.
      Fig 4: Identifying Q43 & B Connectors
      GTY280362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q43-6 (LPLB) - B-6 Always Below 1 Ω
      Q43-5 (LPL) - B-5 Always Below 1 Ω
      Q43-4 (LPLE) - B-4 Always Below 1 Ω
      Q43-6 (LPLB) - Body ground Always 10 kΩ or higher
      Q43-5 (LPL) - Body ground Always 10 kΩ or higher
      Q43-4 (LPLE) - Body ground Always 10 kΩ or higher
      Q43-6 (LPLB) - Q43-4 (LPLE) Always 10 kΩ or higher
      Q43-5 (LPL) - Q43-4 (LPLE) Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Luggage Compartment Door Hinge Assembly LH)

    NG → REPLACE LUGGAGE COMPARTMENT DOOR HINGE ASSEMBLY LH (HARNESS OR CONNECTOR) 

    OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

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