THEFT DETERRENT SYSTEM(w/ Entry and Start 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 intrusion sensor as result of self-diagnosis, following malfunctions are detected:


  1. IOUT line circuit is open

  2. Reception of signals other than normal/ trouble signal

  • Map light assembly

  • Certification ECU (smart key ECU assembly)

  • Harness or connector

WIRING DIAGRAM

A01X9L3E01
*a from Battery
*b Intrusion Sensor
*c Certification ECU (Smart Key ECU Assembly)
*d Map Light Assembly

PROCEDURE


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


    1. A01X3NDE01
      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
      R7-15 (+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
      R7-3 (GND5) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK INTRUSION SENSOR (IOUT)


    1. Using an oscilloscope, check the waveform.

      A01X64ZE01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      		 *b IOUT Initial Signal
      *c IOUT 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 R7-12 (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 intrusion sensor is normal, an initial response is output in response to the HI input from the certification ECU (smart key ECU assembly).

      • If the waveform output remains LO, there may be a problem with the certification ECU (smart key ECU assembly), as there is no input from the certification ECU (smart key ECU assembly).

      OK
      The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).
      Result
      Result Proceed to
      NG (Waveform output remains LO) A
      NG (There is no initial response and the waveform output remains HI) B
      OK (There is an initial response) C

    B

    REPLACE MAP LIGHT ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND)


    1. Disconnect the R7 map light assembly connector.

    2. Disconnect the E30 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-12 (IOUT) - E30-4 (IOUT) Always Below 1 Ω
      R7-12 (IOUT) or E30-4 (IOUT) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR