THEFT DETERRENT SYSTEM, Diagnostic DTC:B2769

DTC Code DTC Name
B2769 Tilt Sensor Signal Circuit Malfunction

DESCRIPTION

The tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 conducts self-diagnosis immediately after power is supplied to the sensor (when the theft deterrent system is set).

If a malfunction is detected in the CSIF terminal circuit, the main body ECU (multiplex network body ECU) stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2769 Tilt Sensor Signal Circuit Malfunction

    After a normal/malfunction signal is output from the tilt sensor (theft warning tilt sensor)*1 or tilt sensor (yaw rate and acceleration sensor)*2 as a result of self-diagnosis, the following malfunctions are detected:

  • Open in CSIF terminal circuit

  • Reception of signals other than normal/malfunction signal

  • Tilt sensor (Theft warning tilt sensor)*1

  • Tilt sensor (Yaw rate and acceleration sensor)*2

  • Main body ECU (Multiplex network body ECU)

  • Wire harness or connector

WIRING DIAGRAM

B007XBQE01

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. CHECK HARNESS AND CONNECTOR (BATTERY - TILT SENSOR - BODY GROUND)


    1. B007YMIC13
      *a

      Front view of wire harness connector

      (to Tilt Sensor)

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

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


      • *1: for Optitron Meter Type

      • *2: for TFT Meter Type

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J19-6 (+B) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      J19-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK TILT SENSOR


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

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


      • *1: for Optitron Meter Type

      • *2: for TFT Meter Type

    3. Using an oscilloscope, check the waveform.

      B007YWEC11
      *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
      Result Proceed to
      OK (There is an initial response) A
      NG (There is no initial response and the waveform output remains HI) (for Optitron Meter Type) B
      NG (There is no initial response and the waveform output remains HI) (for TFT Meter Type) C
      NG (Waveform output remains LO) D

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE TILT SENSOR (THEFT WARNING TILT SENSOR) Click here

    C

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

    D

  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) or J19-5 (CSIF) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR