LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2009 >> Matrix Base, Standard >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent & Keyless Entry >> Engine Immobilizer System >> DTC B2780: Push Switch / Key Unlock Warning Switch Malfunction >> Inspection Procedure

Inspection Procedure

NOTE: If the transponder key ECU assembly is replaced, register the key and ECU communication ID (See REGISTRATION ).
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Immobilizer / Data List.
    5. Read the Data List according to the display on the Techstream.

      Immobilizer (Transponder Key ECU Assembly) 

      ITEM/RANGE REFERENCE CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Key SW Unlock warning switch signal/ON or OFF ON: Key is in ignition key cylinder
      OFF: No key is in ignition key cylinder      		 -

      OK: On the Techstream screen, the item changes between ON and OFF according to the chart above  .

      NG: Go to step   2 

      OK: REPLACE TRANSPONDER KEY ECU ASSEMBLY (See  TRANSPONDER KEY ECU  ) 

  2. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
    1. Remove the unlock warning switch assembly (See REMOVAL ).
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Position Specified Condition
      1-2 Switch pushed (Key set) Below 1 Ω
      1-2 Switch free (Key removed) 10 kΩ or higher
      Fig 1: Identifying Unlock Warning Switch Connector Terminal
      G06036468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY  (See REMOVAL )

      OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - BODY GROUND) 
    1. Disconnect the E6 unlock warning switch assembly connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E6-2 - Body ground Always Below 1 Ω
      Fig 2: Identifying Unlock Warning Switch Connector Terminal
      G06036469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - UNLOCK WARNING SWITCH) 
    1. Disconnect the transponder key ECU assembly connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E29-3 (KSW) - E6-1 Always Below 1 Ω
      E6-1 - Body ground Always 10 kΩ or higher
      Fig 3: Identifying Transponder Key ECU Assembly Connector Terminal
      G06036470Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE TRANSPONDER KEY ECU ASSEMBLY (See  TRANSPONDER KEY ECU  ) 

scientia non olet · About LEMON Manuals