THEFT DETERRENT SYSTEM, Diagnostic DTC:B2764

DTC Code DTC Name
B2764 Short to GND in Intrusion Sensor Signal Circuit

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
B2764

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


  1. IOUT line circuit is shorted to ground

  2. Reception of signals other than normal/ trouble signal

  • Map light assembly

  • Certification ECU (smart key ECU assembly)

  • Harness or connector

WIRING DIAGRAM

A01ERU0E01

INSPECTION PROCEDURE

Note


  • If the certification ECU (smart key ECU assembly) is replaced, refer to the Service Bulletin.

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

PROCEDURE


  1. CHECK INTRUSION SENSOR (IOUT)


    1. Using an oscilloscope, check the waveform.

      A01ENE3E01
      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 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 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).

    NG

    CHECK INTRUSION SENSOR (IOUT) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK INTRUSION SENSOR (IOUT)


    1. A01EQ8RE01

      Disconnect the map light assembly connector.

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

      Standard Voltage
      Tester Connection Condition
      R12-1 (IOUT) - R12-20 (GND5) Immediately after theft deterrent system set
      Result
      Result Proceed to
      IOUT voltage is below 1 V when theft deterrent system is set A
      IOUT voltage is 6.5 V or higher when theft deterrent system is set B

      Tech Tips

      With connector R12 of the map light assembly disconnected, measure the voltage at IOUT when the theft deterrent system is set.


    B

    REPLACE MAP LIGHT ASSEMBLY Click here

    A

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


    1. Disconnect the R12 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
      R12-1 (IOUT) - E30-4 (IOUT) Always Below 1 Ω
      R12-1 (IOUT) or E30-4 (IOUT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)