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Home >> Toyota >> 2003 >> Highlander Limited, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer System - Diagnostics >> Symptom Testing >> Unlock Warning Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT UN-LOCK WARNING SWITCH ASSEMBLY 
    1. Check the continuity.

      Standard: 

    Fig 1: Identifying Unlock Warning Switch & Connector Terminals
    G02828663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Testing Unlock Warning Switch Continuity Table
    G02828664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE UN-LOCK WARNING SWITCH ASSEMBLY 
    2. OK : Go To Next step. 
  2. CHECK WIRE HARNESS (UN-LOCK WARNING SWITCH ASSEMBLY - ECM) 
    1. Disconnect the K4 switch connector.
      Fig 3: Identifying Warning Switch Connector Terminals
      G02828665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E6 ECM connector.
      Fig 4: Disconnecting ECM Connector E6
      G02828666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the continuity between the wire harness side connectors.

      Standard: 

    TESTING UN-LOCK WARNING SWITCH ASSEMBLY TO ECM CIRCUIT

    Symbols (Terminal No.) Specified Condition
    - (K4-2) <--> KSW (E6-23) Continuity
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : CHECK AND REPLACE ECM 
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