LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2005 >> Avalon Limited >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer System (W/O Smart Key System) >> DTC B2780: Push Switch/Key Unlock Warning Switch Malfunction >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF HAND-HELD TESTER 
    1. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM).

      Then connect the CAN VIM to the DLC3.

    2. Turn the ignition switch ON with a key that cannot start the engine.
    3. Read the DATA LIST according to the display on the tester.

      Transponder key ECU: 

      Fig 1: Data List - Transponder Key ECU
      G02977228Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: "ON" (Key is in ignition key cylinder) appears on the screen. 

      Result: 

      REFERENCE CHART

      OK (When checking from the DIAGNOSTIC TROUBLE CODE CHART) A
      OK (When checking from the PROBLEM SYMPTOMS TABLE) B
      NG C
    1. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE  PROBLEM SYMPTOMS TABLE  ) 
    2. C: Go to step 2 
    3. A: REPLACE TRANSPONDER KEY ECU ASSY 
  2. INSPECT UN-LOCK WARNING SWITCH ASSY 
    1. Remove the un-lock warning switch assy.
    2. Measure the resistance according to the value (s) in the table below.
      Fig 2: Identifying Un-Lock Warning Switch Assy
      G02977229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Switch Position Specified Condition
      D31-1 - D31-2 Pushed Below 1 Ω
      D31-1 - D31-2 Not pushed 10 kΩ or higher
    1. NG: REPLACE UN-LOCK WARNING SWITCH ASSY 
    2. OK: Go to next step. 
  3. CHECK HARNESS AND CONNECTOR (UN-LOCK WARNING SWITCH ASSY - BODY GROUND) 
    1. Disconnect the D31 switch connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      Fig 3: Identifying D31 Switch Connector
      G02977230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Condition Specified Condition
      D31-1 - Body ground Always Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  4. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSY - UN-LOCK WARNIG SWITCH ASSY) 
    1. Disconnect the D33 ECU and D31 switch connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      Fig 4: Identifying D33 ECU And D31 Switch Connectors
      G02977231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Condition Specified Condition
      D33-3 (KSW) - D31-2 Always Below 1 Ω
      D31-2 - Body ground Always 10 kΩ or higher
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPLACE TRANSPONDER KEY ECU ASSY 
scientia non olet · About LEMON Manuals