THEFT DETERRENT SYSTEM, Diagnostic DTC:B2762

DTC Code DTC Name
B2762 Intrusion Sensor Signal Circuit Malfunction

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
B2762

After normal/trouble signal is output from theft warning ultrasonic sensor as result of self-diagnosis, following malfunctions are detected:


  1. ISIF line circuit is open

  2. Reception of signals other than normal/ trouble signal

  • Map light assembly

  • Theft warning ultrasonic sensor

  • Main body ECU (multiplex network body ECU)

  • Harness or connector

WIRING DIAGRAM

B001B4FE08

CAUTION / NOTICE / HINT

Note


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

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

  • w/ Door Control Battery:

    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. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - BATTERY AND BODY GROUND)


    1. B001ASJE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Map Light Assembly)

      Disconnect the map light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R7-6 (+B2) - 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
      R7-16 (GND9) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK THEFT WARNING ULTRASONIC SENSOR (IOUT)


    1. Using an oscilloscope, check the waveform.

      B0018MJE02
      Text in Illustration
      *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
      Tester Connection Content
      Tester Connection R12-1 (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 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) B
      NG (There is no initial response and the waveform output remains HI) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    INSPECT MAP LIGHT ASSEMBLY Click here

    B

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


    1. Disconnect the E117 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the R12 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E117-12 (ISIF) - R12-1 (IOUT) Always Below 1 Ω
      R12-1 (IOUT) - Body ground Always 10 kΩ or higher
      E117-12 (ISIF) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

    REPLACE MAIN BODY ECU (MULTIPLEXNETWORK BODY ECU) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the theft warning ultrasonic sensor Click here.

    2. Remove the theft warning ultrasonic sensor from the map light assembly Click here.

    3. B0018MNE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 (GND9) -B-16 (GND9) Always Below 1 Ω
      A-2 (IOUT) - C-1 (IOUT) Always Below 1 Ω
      A-4 (+B2) - B-6 (+B2) Always 10 kΩ or higher

    OK

    REPLACE THEFT WARNING ULTRASONIC SENSOR Click here

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here