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THEFT DETERRENT SYSTEM Tilt Sensor Circuit

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DTC Code DTC Name
  Tilt Sensor Circuit
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DESCRIPTION

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

Tip:

In the following situations, the yawrate sensor (theft warning tilt 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.

Table 1. *a from Auxiliary Battery *b MPX-B D NO. 2 *c Main Body ECU (Multiplex Network Body ECU) *d Yawrate Sensor (Theft Warning Tilt Sensor)
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

  • When replacing the yawrate sensor (theft warning tilt sensor), perform zero point calibration.

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

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PROCEDURE


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    READ VALUE USING GTS (Tilt Sensor)


    1. Connect the GTS to the DLC3.

    2. Turn the power 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.

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      Tip:

      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).


      1. 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

        		 -



      1. Body Electrical > Main Body > Data List
        Tester Display
        Tilt Sensor




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

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    CHECK YAWRATE SENSOR (THEFT WARNING TILT SENSOR)


    1. B004X5MC04
      *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

      Using an oscilloscope, check the waveform.

      Measurement Condition
      Tester Connection Condition Tool Setting Specified Condition
      G17-15 (GCS) - Body ground Theft deterrent system is set (system changes from disarmed state to arming preparation state) 2 V/DIV., 100 ms./DIV. The waveform is output properly (HI is 6.5 V or higher and LO is below 1 V).
      Tip:

      • If the yawrate sensor (theft warning 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).

      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (YAWRATE SENSOR [THEFT WARNING TILT SENSOR] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)


    1. Disconnect the G42 yawrate sensor (theft warning tilt sensor) connector.

    2. Disconnect the G17 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G17-15 (GCS) - G42-5 (CSIF) Always Below 1 Ω
      G42-1 (GND) - Body ground Always Below 1 Ω
      G17-15 (GCS) or G42-5 (CSIF) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE YAWRATE SENSOR (THEFT WARNING TILT SENSOR)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR