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Home › Lexus › 2008 › LS 600hL › Repair and Diagnosis › Body & Frame › Door Locks › Door Lock › Power Door Lock Control System › Only Driver Door LOCK / UNLOCK Functions do not Operate › Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (FRONT DOOR LOCK LH) 
    1. Select the Active Test, use the intelligent tester or Techstream to generate a control command, and then check the door lock motor function.
      1. Intelligent tester

        D-DOOR (Front door ECU LH) 

        CONTROL RANGE REFERENCE

        Tester Display Test Part Control Range Diagnostic Note
        DOOR LOCK Operate door lock motor LOCK or UNLOCK -
      2. Techstream

        Driver Door (Front door ECU LH) 

        ITEM RANGE REFERENCE

        Tester Display Test Part Control Range Diagnostic Note
        Door Lock Operate door lock motor Lock or Unlock -

        OK: Front door lock LH operates normally. 

    NG:  Go to step  4

    OK: Go to Next Step 

  2. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (DOOR LOCK POSITION SWITCH) 
    1. Use the Data List to check if the door lock position switch is functioning properly
      1. Intelligent tester

        D-DOOR (Front door ECU LH) 

        ITEM RANGE REFERENCE

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        LOCK POS SW Driver side door lock position switch signal/ON or OFF ON Driver side door is unlocked
        OFF Driver side door is locked        		 -
      2. Techstream

        Driver Door (Front door ECU LH) 

        ITEM RANGE REFERENCE

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Lock Position SW Driver side door lock position switch signal/ON or OFF ON Driver side door is unlocked
        OFF Driver side door is locked        		 -

        OK: On tester screen, item changes between ON and OFF according to above chart. 

    NG:  Go to step  8

    OK: Go to Next Step 

  3. CHECK FRONT DOOR ECU LH (OPERATION) 
    1. Replace the front door ECU LH with a normally functioning one (see FRONT DOOR )
    2. Check that all doors can be locked and unlocked by using the master switch

      OK: All doors can be locked and unlocked with master switch. 

    NG: REPLACE MAIN BODY ECU 

    OK: END (FRONT DOOR ECU LH IS DEFECTIVE) 

  4. INSPECT FUSE (D DOOR 1, D DOOR 2) 
    1. Remove the D DOOR 1 and D DOOR 2 fuses from the main body ECU
    2. Measure the resistance according to the value(s) in the table below

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      D DOOR 1 fuse Always Below 1 Ω
      D DOOR 2 fuse Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR ECU LH - BATTERY) 
    1. Disconnect the N10 ECU connector.
    2. Measure the voltage according to the value(s) in the table below

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      N10-6 (BDR) - Body ground Always 11 to 14 V
      N10-16 (BDG1) - Body ground Always 11 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 1: Identifying N10 Connector Terminals
    G05783050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  6. INSPECT FRONT DOOR LOCK ASSEMBLY LH 
    Fig 2: Identifying N15 Connector Terminals
    G05783051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Apply battery voltage to the door lock motor and check the operation of the door lock motor

      OK 

      VOLTAGE SPECIFICATION

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal N15-4 (L)
      Battery negative (-) → Terminal N15-1 (UL)      		 Lock
      Battery positive (+) → Terminal N15-1 (UL)
      Battery negative (-) → Terminal N15-4 (L)      		 Unlock

    NG: REPLACE FRONT DOOR LOCK ASSEMBLY LH  (see FRONT DOOR )

    OK: Go to Next Step 

  7. CHECK HARNESS AND CONNECTOR (FRONT DOOR ECU LH - FRONT DOOR LOCK LH) 
    Fig 3: Identifying N9 And N15 Connector Terminals
    G04951519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N9 ECU connector.
    2. Disconnect the N15 door lock connector.
    3. Measure the resistance according to the value(s) in the table below

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      N9-1 (A-) - N15-1 (UL) Always Below 1 Ω
      N9-2 (A+) - N15-4 (L) Always Below 1 Ω
      N15-1 (UL) - Body ground Always 10 kΩ or higher
      N15-4 (L) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT DOOR ECU LH  (see FRONT DOOR )

  8. INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH) 
    Fig 4: Identifying N15 Connector Terminals
    G05783053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance according to the value(s) in the table below

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      N15-7 (E) - N15-8 (LSSR) Unlock Below 1 Ω
      N15-7 (E) - N15-8 (LSSR) Lock 10 kΩ or higher

    NG: REPLACE FRONT DOOR LOCK ASSEMBLY LH  (see FRONT DOOR )

    OK: Go to Next Step 

  9. CHECK HARNESS AND CONNECTOR (FRONT DOOR ECU LH - FRONT DOOR LOCK LH) 
    Fig 5: Identifying N9 And N15 Connector Terminals
    G04951522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N9 ECU connector
    2. Disconnect the N15 door lock connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      N9-13 (LSWE) - N15-7 (E) Always Below 1 Ω
      N9-25 (LSW) - N15-8 (LSSR) Always Below 1 Ω
      N9-13 (LSWE) - Body ground Always 10 kΩ or higher
      N9-25 (LSW) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT DOOR ECU LH  (see FRONT DOOR )

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