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 (theft warning ultrasonic 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

  • Intrusion sensor (theft warning ultrasonic sensor)

  • Certification ECU

  • Harness or connector

WIRING DIAGRAM

A01GYRWE05

INSPECTION PROCEDURE

Note


  • If the certification ECU 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 (THEFT WARNING ULTRASONIC SENSOR) (IOUT)


    1. Using an oscilloscope, check the waveform.

      A01H0G6E01
      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 X6-1 (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 (theft warning ultrasonic sensor) is normal, an initial response is output in response to the HI input from the certification ECU.

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

      OK
      The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).

    NG

    CHECK INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR) (IOUT) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR) (IOUT)


    1. A01GYQAE01
      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
      X6-1 (IOUT) - Body ground 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 X6 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 (CERTIFICATION ECU - MAP LIGHT ASSEMBLY)


    1. Disconnect the L16 certification ECU connector.

    2. Disconnect the X6 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L16-4 (IOUT) - X6-1 (IOUT) Always Below 1 Ω
      L16-4 (IOUT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU

  4. REPLACE MAP LIGHT ASSEMBLY


    1. Temporarily replace the map light assembly with a new or normally functioning one Click here.


    NEXT

  5. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch on (IG), then off.

    3. Set the theft deterrent system to "ARMED STATE".

    4. Check that the security indicator changes from illuminated to blinking.

    5. Set the theft deterrent system to "DISARMED STATE".

    6. Check for DTCs Click here.

      OK
      DTC B2764 is not output.

    NG

    REPLACE INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR) Click here

    OK

    END (MAP LIGHT ASSEMBLY WAS DEFECTIVE)