THEFT DETERRENT SYSTEM Tilt Sensor Circuit

DESCRIPTION

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

WIRING DIAGRAM

B008HE8E10

CAUTION / NOTICE / HINT

Note


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

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

  • 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. 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
      Intrusion Sensor Status of the theft warning ultrasonic sensor (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

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Intrusion Sensor

      Note

      B008GZKC01
      *1 Map Light Assembly
      *a Theft Warning Ultrasonic Sensor (Intrusion Sensor)
      *b Protective Tape

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

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

      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).

      OK
      The display on the GTS changes according to the detection condition of the theft warning ultrasonic sensor (tilt sensor).
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK WAVEFORM (THEFT WARNING ULTRASONIC SENSOR [TILT SENSOR]) (IOUT)


    1. Using an oscilloscope, check the waveform.

      B008J0MC02
      *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
      Item Content
      Tester Connection T6-6 (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 theft warning ultrasonic sensor (tilt 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)

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

    NG (for RHD)

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

    OK

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - MAP LIGHT ASSEMBLY)


    1. Disconnect the I47 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the T6 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I47-12 (ISIF) - T6- 6 (IOUT) Always Below 1 Ω
      I47-12 (ISIF) - Body ground Always 10 kΩ or higher
      T6- 6 (IOUT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE THEFT WARNING ULTRASONIC SENSOR (TILT SENSOR) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR