THEFT DETERRENT SYSTEM, Diagnostic DTC:B2769

DTC Code DTC Name
B2769 Tilt Sensor Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when one of the following occurs: 1) theft warning tilt sensor power supply malfunction, 2) theft warning tilt sensor tilt sensor open malfunction, or 3) EEPROM malfunction.

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

    If one of the following is detected:

  • Theft warning tilt sensor power supply malfunction

  • Theft warning tilt sensor open malfunction

  • EEPROM malfunction

  • Theft warning tilt sensor

  • Main body ECU (multiplex network body ECU)

  • Harness or connector

WIRING DIAGRAM

A0002DGE04
*a from Auxiliary Battery
*b ECU-B NO.1
*c Theft Warning Tilt Sensor
*d Main Body ECU (Multiplex Network Body ECU)

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.

PROCEDURE


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


    1. A0001IAC09
      *a

      Front view of wire harness connector

      (to Theft Warning Tilt Sensor)

      Disconnect the theft warning tilt sensor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I127-6 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I127-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

    2. Disconnect the I127 theft warning tilt sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I47-6 (GCS) - I127-5 (CSIF) Always Below 1 Ω
      I47-6 (GCS) - Body ground Always 10 kΩ or higher
      I127-5 (CSIF) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK WAVEFORM (THEFT WARNING TILT SENSOR) (CSIF)


    1. Using an oscilloscope, check the waveform.

      A0001IPC06
      *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
      Measurement Condition
      Tester Connection Content
      Tester Connection I47-6 (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 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).

      OK
      The waveform displays 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 (Waveform output remains LO) (for LHD) B
      NG (Waveform output remains LO) (for RHD) C
      NG (There is no initial response and the waveform output remains HI) D

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

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

    C

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

    D

    REPLACE THEFT WARNING TILT SENSOR Click here