THEFT DETERRENT SYSTEM Tilt Sensor Circuit

DTC Code DTC Name
Tilt Sensor Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) operates the tilt sensor (yaw rate sensor) via the CSIF communication line. The tilt sensor (yaw rate 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

B312497E01

CAUTION / NOTICE / HINT

Note:

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

  • 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 (TILT SENSOR)

    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

      Tilt Sensor

      Status of the tilt sensor detection

      ON or OFF

      ON: Tilt sensor detected

      OFF: Tilt sensor not detected

      -

      Body Electrical > Main Body > Data List

      Tester Display

      Tilt Sensor
      Note:

      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).

      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) (w/ Entry and Start System).

      OK

      The display on the GTS changes according to the detection condition of the tilt sensor (yaw rate sensor assembly).

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

  2. CHECK WAVEFORM (TILT SENSOR [YAW RATE SENSOR ASSEMBLY]) (CSIF)

    1. Using an oscilloscope, check the waveform.

      B312498C05

      *a

      Component with harness connected

      (Main Body ECU [Multiplex Network Body ECU])

      *b

      CSIF Initial Signal

      *c

      CSIF Initial Response

      *d

      Approximately 1.0 seconds

      *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

      *k

      HI

      *l

      LO
      Table 1. Measurement Condition

      Tester Connection

      Content

      Tester Connection

      G79-6 (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)
      Tip:

      • If the tilt sensor (yaw rate sensor assembly) 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
    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TILT SENSOR [YAW RATE SENSOR ASSEMBLY] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)

    1. Disconnect the N16 yaw rate sensor assembly connector.

    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

      Tester Connection

      Condition

      Specified Condition

      N16-5 (CSIF) - G79-6 (GCS)

      Always

      Below 1 Ω

      N16-1 (GND) - Body ground

      Always

      Below 1 Ω

      N16-5 (CSIF) - Body ground

      Always

      10 kΩ or higher

      G79-6 (GCS) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TILT SENSOR (YAW RATE SENSOR ASSEMBLY)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR