THEFT DETERRENT SYSTEM Tilt Sensor Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) communicates with the tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 via the CSIF communication line. The tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 sends information regarding changes in the vehicle tilt angle to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) checks whether the vehicle body is being tilted without authorization.

Tech Tips

In the following situations, the tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 may operate and cause the theft deterrent system to operate even when the sensor is normal.


  • The vehicle is transported by a ferry, trailer or train.

  • The vehicle is parked in a multi-story parking facility.

  • The vehicle is washed by an automatic car wash.

  • A tire blows out.

  • The vehicle is jacked up for a tire or wheel change.

  • An earthquake occurs or the road subsides.

  • Goods such as skis or snowboards are loaded or unloaded.


  • *1: for Optitron Meter Type

  • *2: for TFT Meter Type

WIRING DIAGRAM

B005Q66E01

CAUTION / NOTICE / HINT

Note


  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • When replacing the tilt sensor (yaw rate and acceleration sensor), perform zero point calibration.*

    Click here


    • *: for TFT Meter Type

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Buzzer Function

PROCEDURE


  1. READ VALUE USING GTS (TILT SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the Data List according to the display on the GTS.

      Note

      After setting the theft deterrent system, wait at least 30 seconds (until the vehicle is in the armed state), tilt the vehicle (jack up the vehicle so that the tires are in the air) and check the Data List.

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Tilt Sensor Detection status of the tilt sensor ON or OFF

      ON: Change in pitch angle detected

      OFF: Change in pitch angle not detected

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Tilt Sensor
      OK
      The GTS display changes correctly in response to the detection condition of the tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2

      • *1: for Optitron Meter Type

      • *2: for TFT Meter Type

      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. CHECK TILT SENSOR


    1. Using an oscilloscope, check the waveform.

      B005OXGC11
      *a

      Component with harness connected

      (Main Body ECU (Multiplex Network Body ECU))

      		 *b CSIF Initial Signal
      *c CSIF Initial Response *d Approximately 1.0 Second
      *e Initial Diagnosis *f Approximately 1.0 to 1.6 Seconds
      *g Approximately 0.05 Seconds *h Approximately 5.5 Seconds
      *i Disarmed State *j Arming Preparation State
      Measurement Condition
      Item Content
      Tester Connection J9-6 (GCS) - Body ground
      Tool Setting 2 V/DIV., 100 ms./DIV.
      Condition Theft deterrent system is set (system changes from disarmed state to arming preparation state)

      Tech Tips


      • If the tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 is normal, an initial response is output in response to the HI input from the main body ECU (multiplex network body ECU).


        • *1: for Optitron Meter Type

        • *2: for TFT Meter Type

      • If the waveform output remains LO, there may be a problem with the main body ECU (multiplex network body ECU), as there is no input from the main body ECU (multiplex network body ECU).

      OK
      The waveform is output properly (HI is 6.5 V or higher and LO is below 1 V).
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (TILT SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the J9 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the J19 tilt sensor (theft warning tilt sensor) connector.*1

    3. Disconnect the J19 tilt sensor (yaw rate and acceleration sensor) connector.*2


      • *1: for Optitron Meter Type

      • *2: for TFT Meter Type

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J9-6 (GCS) - J19-5 (CSIF) Always Below 1 Ω
      J9-6 (GCS) - Body ground Always 10 kΩ or higher
      J19-5 (CSIF) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for Optitron Meter Type) A
      OK (for TFT Meter Type) B
      NG C

    A

    REPLACE TILT SENSOR (THEFT WARNING TILT SENSOR) Click here

    B

    REPLACE TILT SENSOR (YAW RATE AND ACCELERATION SENSOR) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR