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Home >> Lexus >> 2004 >> GX 470 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Power Door Lock Control System - Diagnosis >> Key Lock-In Prevention Function Does Not Work Properly (Manual Operation And Operation Interlocked With Key Are Active) >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF HAND-HELD TESTER 
    1. Using the hand-held tester, check that unlock warning switch signal is output when the switch is operated.

    Standard (Body ECU (Switch condition)): 

    MEASUREMENT ITEM/DISPLAY (RANGE) AND DIAGNOSTIC NOTE

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    KEY UNLK WRN SW Un-lock warning switch signal/ON or OFF ON: Key is in ignition key cylinder
    OFF: No key is in ignition key cylinder    		 -
    1. OK: Go to step   4 
    2. NG: Go To Next Step 
  2. INSPECT UNLOCK WARNING SWITCH ASSY 
    1. Remove the unlock warning switch.
    2. Inspect the unlock warning switch continuity.

    Standard: 

    TERMINAL NO AND CONDITION SPECIFICATION

    Terminal No. Condition Specified Condition
    1 <=> 2 Switch free
    (Key removed)    		 No continuity
    Switch pushed
    (Key set)    		 Continuity
    1. NG: REPLACE UNLOCK WARNING SWITCH ASSY 
    2. OK: Go To Next Step 
    Fig 1: Inspecting Unlock Warning Switch Continuity
    G03476843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY --> INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU)) 
    1. Disconnect the K3 unlock warning switch and B5 body ECU connectors.
    2. Check the continuity between the wire harness side connectors.

    Standard (Check for open): 

    SYMBOLS (TERMINAL NO.) SPECIFIED CONDITION

    Symbols (Terminal No.) Specified Condition
    - (K3-2) <=> KSW (B5-14) Continuity
    - (K3-1) <=> Body ground
    Fig 2: Checking Wire Harness (Unlock Warning Switch Assy Instrument Panel Junction Block Assy (Body ECU)
    G03476844Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
  4. READ VALUE OF HAND-HELD TESTER 
    1. Using the hand-held tester, check that driver side door courtesy switch signal is output when the switch is operated.

    Standard (Body ECU (Switch condition)): 

    MEASUREMENT ITEM/DISPLAY (RANGE) AND DIAGNOSTIC NOTE

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    D DOR CTY SW Driver side door courtesy switch signal/ON or OFF ON: Driver side door is open
    OFF: Driver side door is closed    		 -
    1. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. NG: Go To Next Step 
  5. INSPECT FRONT DOOR COURTESY Lamp SWITCH ASSY (DRIVER SIDE) 
    1. Remove the courtesy lamp switch.
    2. Inspect the courtesy lamp switch continuity.

    Standard: 

    TERMINAL NO AND SPECIFIED CONDITION

    Terminal No. Condition Specified Condition
    1 <=> Body ground Free Continuity
    Pushed No continuity
    Fig 3: Inspecting Front Door Courtesy Lamp Switch Assy (Driver Side)
    G03476845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE FRONT DOOR COURTESY Lamp SWITCH ASSY 
    2. OK: Go To Next Step 
  6. CHECK WIRE HARNESS (FRONT DOOR COURTESY Lamp SWITCH ASSY (DRIVER SIDE) <=> INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU)) 
    1. Disconnect the D12 courtesy lamp switch and B4 body ECU connectors.
    2. Check the continuity between the wire harness side connectors.

    Standard (Check for open): 

    SYMBOLS (TERMINAL NO.) AND SPECIFIED CONDITION

    Symbols (Terminal No.) Specified Condition
    - (D12-1) <=> DCTY (B4-23) Continuity
    Fig 4: Checking Continuity Between Wire Harness Side Connectors
    G03476846Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
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