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Home >> Lexus >> 2005 >> GX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock Control System - Diagnostics >> No Doors Lock/Unlock Functions Operate Via Master Switch, Door Control Switch Or Driver Side Door Key Cylinder >> Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER 
    1. Select the ACTIVE TEST, and then check that the power door lock operates.

      HINT:

      During the ACTIVE TEST, the hand-held tester sends a signal to the body ECU to drive all the power door lock motors. If the power door lock operates, the power door lock motor itself and the wire harness between the power door lock motor and body ECU are considered to be normal.

      Standard (Body ECU):

      ACTIVE TEST BY HAND-HELD TESTER

      Item Test Details Diagnostic Note
      DOOR LOCK Operate the door lock motor for all doors OFF/LOCK/UNLOCK -
    1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. OK: Go to next step. 
  2. INSPECT MASTER SWITCH, DOOR CONTROL SWITCH OR DRIVER SIDE DOOR KEY CYLINDER OPERATION 
    1. When manual door lock/unlock operation via the master switch can not be performed, proceed to A.
    2. When manual door lock/unlock operation via the door control switch (passenger side) can not be performed, proceed to B.
    3. When manual door lock/unlock operation interlocked with the driver side door lock key cylinder can not be performed, proceed to C.
    1. B: Go to step   5 . 
    2. C: Go to step   7 . 
    3. A: Go to next step. 
  3. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Check that all the power window switches on the master switch except the door lock control switch function normally.
    1. OK: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    2. NG: Go to next step. 
  4. CHECK DTC 
    1. Check that there is no abnormality in the communication system by inspecting the communication function of the multiplex communication system with the hand-held tester.
      1. (ECU unconnected, communication line abnormal) Without code outputs, proceed to A.
      2. (ECU unconnected, communication line abnormal) With code outputs, proceed to B.
    1. B: GO TO MULTIPLEX COMMUNICATION SYSTEM (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    2. A: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
  5. INSPECT DOOR CONTROL SWITCH ASSY (PASSENGER SIDE) 
    1. Passenger side:

      Inspect the door control switch continuity.

      Standard:

      DOOR CONTROL SWITCH ASSY (PASSENGER SIDE)

      Terminal No. Switch Position Specified Condition
      2 <=> 3 Lock Continuity
      - OFF No continuity
      1 <=> 2 Unlock Continuity
      Fig 1: Inspecting Door Control Switch Assy (Passenger Side)
      G02965678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE DOOR CONTROL SWITCH ASSY 
    2. OK: Go to next step. 
  6. CHECK WIRE HARNESS (DOOR CONTROL SWITCH ASSY <=> INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) AND BODY GROUND) 
    1. Disconnect the D19 door control switch and IK body ECU connectors.
    2. Check the continuity between the wire harness side connectors.
      Fig 2: Door Control Switch Assy To Instrument Panel Junction Block Assy (Body ECU) & Body Ground Table
      G02965680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      Fig 3: Checking Wire Harness (Door Control Switch Assy <=> Instrument Panel Junction Block Assy (Body ECU) & Body Ground)
      G02965679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
  7. INSPECT FRONT DOOR W/ MOTOR LOCK ASSY LH 
    1. Apply battery voltage and inspect operation of the door lock motor.

      Standard: 

      Fig 4: Inspecting Door Lock Motor Operation Table
      G02965683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 5: Inspecting Operation Of Door Lock Motor
      G02965681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the position switch continuity.

      Standard: 

      Fig 6: Inspecting Position Switch Continuity Table
      G02965684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the door lock and unlock switch continuity.

      Standard:

      DOOR LOCK AND UNLOCK SWITCH CONTINUITY

      Terminal No. Door Lock Position Specified Condition
      7 <=> 9 Lock Continuity
      - OFF -
      7 <=> 10 Unlock Continuity
      Fig 7: Inspecting Door Lock And Unlocking Switch Continuity
      G02965682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE FRONT DOOR W/ MOTOR LOCK ASSY LH 
    2. OK: Go to next step. 
  8. CHECK WIRE HARNESS (FRONT DOOR W/ MOTOR LOCK ASSY LH <=> INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) AND BODY GROUND) 
    1. Disconnect the D16 door lock, B3 and IL body ECU connectors.
    2. Check the continuity between the wire harness side connectors.

      Standard (Check for open): 

      Fig 8: Front Door W/ Motor Lock Assy LH To Instrument Panel Junction Block Assy (Body ECU) & Body GroundTable
      G02965686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 9: Checking Wire Harness (Front Door W/Motor Lock Assy LH <-> Instrument Panel Junction Block Assy (Body ECU) & Body Ground)
      G02965685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY