THEFT DETERRENT SYSTEM, Diagnostic DTC:B2762 and B2764

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

DESCRIPTION

  • The 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 (instrument panel junction block assembly) stores DTC B2762.

  • B2764 DTC is stored when terminal IOUT of the 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 intrusion sensor as 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 (Intrusion sensor)

  • Main body ECU (Instrument panel junction block assembly)

  • Harness or connector

B2764

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

Terminal IOUT of the intrusion sensor has not received a signal for 5 seconds or more.

  • Map light assembly (Intrusion sensor)

  • Main body ECU (Instrument panel junction block assembly)

  • Harness or connector

WIRING DIAGRAM

B218355E04

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

    1. U122573E02

      Disconnect the Q10 light connector.

    2. Disconnect the H80 ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q10-5 (IOUT) - H80-7 (ISIF)

      Always

      Below 1 Ω

      Q10-5 (IOUT) or H80-7 (ISIF) - Body ground

      Always

      10 kΩ or higher

      Q10-2 (GND) - Body ground

      Always

      Below 1 Ω
      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Map Light Assembly)

      *2

      Front view of wire harness connector

      (to Main Body ECU [Instrument Panel Junction Block Assembly])

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  2. CHECK MAP LIGHT ASSEMBLY (INTRUSION SENSOR)

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

    2. Check if DTC B2762 or B2764 is output.

      OK

      DTC B2762 or B2764 is not output.

    END (MAP LIGHT ASSEMBLY [INTRUSION SENSOR] IS FAULTY)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)