THEFT DETERRENT SYSTEM, Diagnostic DTC:B2762, B2764

DTC Code DTC Name
B2762 Intrusion Sensor Signal Circuit Malfunction
B2764 Short to GND in Intrusion Sensor Signal Circuit

DESCRIPTION

The theft warning radar sensor (intrusion sensor) conducts a self-diagnosis immediately after power is supplied to the sensor (when the theft deterrent system is set).

If a malfunction is detected in the IOUT line, the main body ECU stores DTC B2762.

DTC B2764 is stored when terminal IOUT of the theft warning radar sensor (intrusion sensor) has not received a signal for 5 seconds or more.

DTC Code DTC Detection Condition Trouble Area
B2762

After a normal/trouble signal is output from the theft warning radar sensor (intrusion sensor) as a result of self-diagnosis, either of the following malfunctions is detected:


  1. The IOUT line circuit is open.

  2. Signals other than a normal/trouble signal are received.

  • Map light assembly (theft warning radar sensor [intrusion sensor])

  • Main body ECU

  • Harness or connector
B2764

After a normal/trouble signal is output from the theft warning radar sensor (intrusion sensor) as a result of self-diagnosis, the following malfunction is detected:

Terminal IOUT of the theft warning radar sensor (intrusion sensor) has not received a signal for 5 seconds or more.

  • Map light assembly (theft warning radar sensor [intrusion sensor])

  • Main body ECU

  • Harness or connector

WIRING DIAGRAM

A0098YWE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


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


    1. A009AQQE06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Map Light Assembly)

      Disconnect the W7 light connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W7-5 (GND3) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W7-7 (S+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (MAP LIGHT - MAIN BODY ECU)


    1. Disconnect the W7 light connector.

    2. Disconnect the G63 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W7-6 (IOUT) - G63-12 (ISIF) Always Below 1 Ω
      W7-6 (IOUT) or G63-12 (ISIF) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK MAP LIGHT ASSEMBLY (THEFT WARNING RADAR SENSOR)


    1. A0098VFE01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)
      *b Waveform
      *c Initial Response

      Using an oscilloscope, check the waveform.

      Measurement Condition
      Item Content
      Tester Connection W7-6 (IOUT) - Body ground
      Tool Setting 2 V/DIV., 100 ms./DIV.
      Condition Immediately after theft deterrent system set

      Tech Tips


      • If the intrusion sensor is normal when the map light receives a HI input signal from the main body ECU, the sensor outputs the initial response.

      • When the input signal from the main body ECU is LOW and does not change, the main body ECU may be malfunctioning.

      OK
      Initial response occurs (refer to illustration).
      Result
      Result Proceed to
      OK A
      NG (Signal is LOW and does not change) B
      NG (Signal is HIGH and does not change) C

    B

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

    C

    REPLACE MAP LIGHT ASSEMBLY (THEFT WARNING RADAR SENSOR) Click here

    A

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