FixVault
Home › Lexus › 2008 › IS 350 › Repair and Diagnosis › Body & Frame › Door Locks › Door Lock › Power Door Lock Control System › Driver Side Door Key Lock and Unlock Switch Circuit › Inspection Procedure

Inspection Procedure

  1. READ VALUE OF DATA LIST 
    1. Check the Data List to ensure proper function of the door unlock detection switch.

      Master SW (Multiplex Network Master Switch Assembly): 

      TESTER DISPLAY REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Door Key Lock Driver door lock/unlock switch lock signal (key-linked lock switch)
      /ON or OFF      		 ON: Driver side door key cylinder is turned to LOCK
      OFF: Driver side door key cylinder is not turned to LOCK      		 -
      Door Key Unlock Driver door lock/unlock switch unlock signal (key-linked unlock switch)
      /ON or OFF      		 ON: Driver side door key cylinder is turned to UNLOCK
      OFF: Driver side door key cylinder is not turned to UNLOCK      		 -

      OK: 

      The display is as specified in the normal condition column. 

      NG: Go to step   2 

      OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  2. INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR KEY LOCK AND UNLOCK SWITCH) 
    1. Remove the front door lock assembly LH.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      7-9 ON (Door lock set to LOCK) Below 1 Ω
      7-9,7-10 OFF (Free) 10 kΩ or higher
      7-10 ON (Door lock set to UNLOCK) Below 1 Ω
      Fig 1: Inspecting Front Door Lock Assembly (Door Key Lock And Unlock Switch)
      G05827979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE FRONT DOOR LOCK ASSEMBLY 

      OK: Go to Next Step 

  3. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH) 
    1. Disconnect the front door lock assembly LH connector.
    2. Disconnect the multiplex network master switch assembly connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection (Symbols) Condition Specified Condition
      M2-9 (L) - M7-4 (KL) Always Below 1 Ω
      M2-10 (UL) - M7-14 (KUL) Always Below 1 Ω
      M2-7 (E) - Body ground Always Below 1 Ω
      M7-4 (KL) - Body ground Always 10 kΩ or higher
      M7-14 (KUL) - Body ground Always 10 kΩ or higher
      Fig 2: Identifying M2 Front Door Lock Assembly And M7 Multiplex Network Master Switch Connectors
      G05827980Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 

About FixVault