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Home >> Lexus >> 2009 >> SC 430 >> Repair and Diagnosis (Single Page) >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop System (Diagnostic Codes & Circuit Tests) >> Retractable Hardtop System >> DTC B2509: Short in Pulse Width Modulation Motor RH Circuit >> Procedure

DTC B2509: Short in Pulse Width Modulation Motor RH Circuit: Procedure

  1. INSPECT SLIDING ROOF DRIVE GEAR ASSEMBLY RH (ROOF DRIVE MOTOR RH OPERATION) 
    1. Remove the sliding roof drive gear RH. Refer to REMOVAL .
      Fig 1: Inspecting Sliding Roof Drive Gear Assembly (Roof Drive Motor Operation)
      GTY155592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the drive gear terminals and check operation of the sliding roof drive gear RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 3      		 Turns clockwise
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY RH 

    OK: Go to next step 

  2. INSPECT LUGGAGE DOOR DRIVE GEAR ASSEMBLY RH (LUGGAGE DOOR DRIVE MOTOR RH) 
    1. Remove the luggage door drive gear RH. Refer to REMOVAL .
      Fig 2: Inspecting Sliding Roof Drive Gear Assembly (Luggage Door Drive Motor)
      GTY155575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the drive gear terminals and check operation of the luggage door drive gear RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 3      		 Turns clockwise
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE LUGGAGE DOOR DRIVE GEAR ASSEMBLY RH 

    OK: Go to next step 

  3. INSPECT LUGGAGE CLOSER MOTOR ASSEMBLY (CLOSER MOTOR RH OPERATION) 
    1. Remove the luggage closer motor RH. Refer to DISASSEMBLY .
      Fig 3: Inspecting Luggage Closer Motor Assembly (Closer Motor Operation)
      GTY155766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the motor terminals and check operation of the luggage closer motor RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2      		 Turns clockwise
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY 

    OK: Go to next step 

  4. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - SLIDING ROOF DRIVE GEAR RH) 
    1. Disconnect the S20 ECU connector.
      Fig 4: Identifying Connector Terminals
      GTY122352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the R17 drive gear connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S20-2 (RMR-) - S20-6 (RMR+) 10 kΩ or higher
      S20-2 (RMR-) - Body ground 10 kΩor higher
      S20-6 (RMR+) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - LUGGAGE DOOR DRIVE GEAR RH) 
    1. Disconnect the S20 ECU connector.
      Fig 5: Identifying Connector Terminals
      GTY122491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L18 drive gear connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S20-4 (LMR-) - S20-5 (LMR+) 10 kΩ or higher
      S20-4 (LMR-) - Body ground 10 kΩ or higher
      S20-5 (LMR+) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  6. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - LUGGAGE CLOSER MOTOR RH) 
    1. Disconnect the S19 ECU connector.
      Fig 6: Identifying Connector Terminals
      GTY155759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L16 motor connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S19-4 (LFR+) - S19-12 (LFR-) 10 kΩ or higher
      S19-4 (LFR+) - Body ground 10 kΩ or higher
      S19-12 (LFR-) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK → REPLACE SLIDING ROOF CONTROL ECU 



  1. INSPECT SLIDING ROOF DRIVE GEAR ASSEMBLY RH (ROOF DRIVE MOTOR RH OPERATION) 
    1. Remove the sliding roof drive gear RH. Refer to REMOVAL .
      Fig 1: Inspecting Sliding Roof Drive Gear Assembly (Roof Drive Motor Operation)
      GTY155592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the drive gear terminals and check operation of the sliding roof drive gear RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 3      		 Turns clockwise
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY RH 

    OK: Go to next step 

  2. INSPECT LUGGAGE DOOR DRIVE GEAR ASSEMBLY RH (LUGGAGE DOOR DRIVE MOTOR RH) 
    1. Remove the luggage door drive gear RH. Refer to REMOVAL .
      Fig 2: Inspecting Sliding Roof Drive Gear Assembly (Luggage Door Drive Motor)
      GTY155575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the drive gear terminals and check operation of the luggage door drive gear RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 3      		 Turns clockwise
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE LUGGAGE DOOR DRIVE GEAR ASSEMBLY RH 

    OK: Go to next step 

  3. INSPECT LUGGAGE CLOSER MOTOR ASSEMBLY (CLOSER MOTOR RH OPERATION) 
    1. Remove the luggage closer motor RH. Refer to DISASSEMBLY .
      Fig 3: Inspecting Luggage Closer Motor Assembly (Closer Motor Operation)
      GTY155766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage to the motor terminals and check operation of the luggage closer motor RH.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2      		 Turns clockwise
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1      		 Turns counterclockwise

    NG → REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY 

    OK: Go to next step 

  4. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - SLIDING ROOF DRIVE GEAR RH) 
    1. Disconnect the S20 ECU connector.
      Fig 4: Identifying Connector Terminals
      GTY122352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the R17 drive gear connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S20-2 (RMR-) - S20-6 (RMR+) 10 kΩ or higher
      S20-2 (RMR-) - Body ground 10 kΩor higher
      S20-6 (RMR+) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - LUGGAGE DOOR DRIVE GEAR RH) 
    1. Disconnect the S20 ECU connector.
      Fig 5: Identifying Connector Terminals
      GTY122491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L18 drive gear connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S20-4 (LMR-) - S20-5 (LMR+) 10 kΩ or higher
      S20-4 (LMR-) - Body ground 10 kΩ or higher
      S20-5 (LMR+) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  6. CHECK WIRE HARNESS FOR SHORT CIRCUIT (ECU - LUGGAGE CLOSER MOTOR RH) 
    1. Disconnect the S19 ECU connector.
      Fig 6: Identifying Connector Terminals
      GTY155759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L16 motor connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance

      Tester Connection Specified Condition
      S19-4 (LFR+) - S19-12 (LFR-) 10 kΩ or higher
      S19-4 (LFR+) - Body ground 10 kΩ or higher
      S19-12 (LFR-) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK → REPLACE SLIDING ROOF CONTROL ECU 

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