THEFT DETERRENT SYSTEM Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is closed and turns off when the engine hood is opened.

WIRING DIAGRAM

A01QUAQE04

CAUTION / NOTICE / HINT

Note

When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS (HOOD COURTESY SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. According to the display on the GTS, read the Data List.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Hood Courtesy SW Engine hood courtesy switch ON or OFF

      ON: Engine hood open

      OFF: Engine hood closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Hood Courtesy SW
      OK
      The indicator on the GTS switches between ON and OFF in accordance with the engine hood courtesy switch (hood lock assembly) status.
      Result
      Proceed to
      OK (for LHD)
      OK (for RHD)
      NG

    OK (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY [ENGINE HOOD COURTESY SWITCH] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the A59*1 or A50*2 hood lock assembly (engine hood courtesy switch) connector.


      • *1: Gasoline

      • *2: Diesel

    2. Disconnect the G79 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for Gasoline, w/ Stop and Start System:
      Tester Connection Condition Specified Condition
      A59-2 (+) - G79-5 (HCTY) Always Below 1 Ω
      A59-2 (+) - Body ground Always 10 kΩ or higher
      G79-5 (HCTY) - Body ground Always 10 kΩ or higher
      for Gasoline, w/o Stop and Start System:
      Tester Connection Condition Specified Condition
      A59-1 (+) - G79-5 (HCTY) Always Below 1 Ω
      A59-1 (+) - Body ground Always 10 kΩ or higher
      G79-5 (HCTY) - Body ground Always 10 kΩ or higher
      for Diesel, w/ Stop and Start System:
      Tester Connection Condition Specified Condition
      A50-2 (+) - G79-5 (HCTY) Always Below 1 Ω
      A50-2 (+) - Body ground Always 10 kΩ or higher
      G79-5 (HCTY) - Body ground Always 10 kΩ or higher
      for Diesel, w/o Stop and Start System:
      Tester Connection Condition Specified Condition
      A50-1 (+) - G79-5 (HCTY) Always Below 1 Ω
      A50-1 (+) - Body ground Always 10 kΩ or higher
      G79-5 (HCTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY [ENGINE HOOD COURTESY SWITCH] - BODY GROUND)


    1. Disconnect the A59*1 or A50*2 hood lock assembly (engine hood courtesy switch) connector.


      • *1: Gasoline

      • *2: Diesel

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for Gasoline, w/ Stop and Start System:
      Tester Connection Condition Specified Condition
      A59-1 (E) - Body ground Always Below 1 Ω
      for Gasoline, w/o Stop and Start System:
      Tester Connection Condition Specified Condition
      A59-2 (E) - Body ground Always Below 1 Ω
      for Diesel, w/ Stop and Start System:
      Tester Connection Condition Specified Condition
      A50-1 (E) - Body ground Always Below 1 Ω
      for Diesel, w/o Stop and Start System:
      Tester Connection Condition Specified Condition
      A50-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)


    1. Remove the hood lock assembly (engine hood courtesy switch).

      Click here

    2. Inspect the hood lock assembly (engine hood courtesy switch).

      Click here

      Result
      Proceed to
      OK (for LHD)
      OK (for RHD)
      NG

    OK (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH) Click here