LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 88 (Smart Key System (Keyless Start) (2GR-FE) (Diagnostic Codes & Symptom Tests)) >> Smart Key System >> DTC B2278: Engine Switch Circuit Malfunction >> Procedure

DTC B2278: Engine Switch Circuit Malfunction: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM (START SWITCH) 
    1. Connect Techstream to the DLC3.
    2. Check the DATA LIST for proper functioning of the start switch.

      HINT: 

      When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

      MAIN BODY:

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      St SW1 Start Switch 1 / ON or OFF ON: Engine switch is pushed
      OFF: Engine switch is not pushed      		 -
      St SW2 Start Switch 2 / ON or OFF ON: Engine switch is pushed
      OFF: Engine switch is not pushed      		 -

      OK

      ON (engine switch is pushed) and OFF (engine switch is not pushed) appear on the screen.

    NG → See step   2 

    OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

  2. INSPECT ENGINE SWITCH 
    1. Remove the engine switch, refer to REMOVAL .
      Fig 1: Inspecting Engine Switch
      GTY104447Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Switch Condition Specified Condition
      7 (SS1) - 5 (GND) Pushed Below 1 Ω
      2 (SS2) - 5 (GND) Pushed Below 1 Ω
      7 (SS1) - 5 (GND) Not pushed 10 kΩ or higher
      2 (SS2) - 5 (GND) Not pushed 10 kΩ or higher

      HINT: 

      This switch is a momentary type switch.

    NG → See step   4 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) 
    1. Disconnect the D8 ECU connector.
      Fig 2: Identifying D8 & D25 Switch Connector Terminals
      GTY199582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the D25 switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      D25-7 (SS1) - D8-17 (SSW1) Always Below 1 Ω
      D25-2 (SS2) - D8-16 (SSW2) Always Below 1 Ω
      D25-5 (GND) - Body ground Always Below 1 Ω
      D25-7 (SS1) or D8-17 (SSW1) - Body ground Always 10 kΩ or higher
      D25-2 (SS2) or D8-16 (SSW2) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

  4. REPLACE ENGINE SWITCH. Refer to  REMOVAL 
scientia non olet · About LEMON Manuals