THEFT DETERRENT SYSTEM Tilt Sensor Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) communicates with the tilt sensor (theft warning ultrasonic sensor) via the ISIF communication line. The tilt sensor (theft warning ultrasonic sensor) 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 ultrasonic sensor) 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.

WIRING DIAGRAM

B001B4FE07

CAUTION / NOTICE / HINT

Note


  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

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

  • w/ Door Control Battery:

    As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure Click here

PROCEDURE


  1. READ VALUE USING GTS (Intrusion 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

      B0019K2C01
      *1 Map Light Assembly
      *a Intrusion Sensor (Theft Warning Ultrasonic Sensor)
      *b Tape

      • Be sure to cover the 2 intrusion sensors (theft warning ultra sonic sensor) in the map light assembly with tape to prevent detected by the intrusion sensor.

      • 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

      Tech Tips

      When performing the above inspection, have the electrical key transmitter in the vehicle exterior detection area to perform certification (this prevents the alarm from sounding).

      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Intrusion Sensor Status of the tilt sensor detection ON or OFF

      ON: Change in pitch angle detected

      OFF: Both of the conditions below is met


      • No moving object detected by sensor

      • Vehicle tilt not detected by sensor

      -
      OK
      The GTS display changes correctly in response to the detection condition of the tilt sensor (theft warning ultrasonic sensor).
      Result
      Proceed to
      OK
      NG

    OK
    NG
  2. CHECK TILT SENSOR (THEFT WARNING ULTRASONIC SENSOR) (IOUT)


    1. Using an oscilloscope, check the waveform.

      B0018MJC01
      *a

      Component with harness connected

      (Map Light Assembly)

      *b IOUT Initial Signal
      *c IOUT 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
      Tester Connection Content
      Tester Connection R-12 (IOUT) - 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 ultrasonic sensor) is normal, an initial response is output in response to the HI input from the main body ECU (multiplex network body ECU).

      • 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 displays properly (HI is 6.5 V or higher and LO is below 1 V).
      Result
      Proceed to
      OK
      NG (for LHD)
      NG (for RHD)

    NG (for LHD)
    NG (for RHD)
    OK
  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - MAP LIGHT ASSEMBLY)


    1. Disconnect the E117 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the R12 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E117-12 (ISIF) - R12-1 (IOUT) Always Below 1 Ω
      E117-12 (ISIF) or R12-1 (IOUT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  4. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly.

      Click here

    2. Remove the tilt sensor (theft warning ultrasonic sensor) from the map light assembly.

      Click here

    3. B0018MNE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 (GND9) -B-16 (GND9) Always Below 1 Ω
      A-2 (IOUT) - C-1 (IOUT) Always Below 1 Ω
      A-4 (+B2) - B-6 (+B2) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG