Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

Lexus IS250 IS220d GSE20 ALE20 - THEFT DETERRENT

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - PERSONAL LIGHT ASSEMBLY)

CHECK OPERATION OF INTRUSION SENSOR

DTC B2762 Intrusion Sensor Signal Circuit Malfunction

DESCRIPTION

The intrusion sensor conducts 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 - ISIF line, the main body ECU RH outputs this DTC.
DTC No.DTC Detection ConditionTrouble Area
B2762After normal/trouble signal is output from intrusion sensor as result of self-diagnosis, following malfunctions are detected:
IOUT - ISIF line circuit is open
Reception of signals other than normal/trouble signal
Intrusion sensor
Wire harness
Main body ECU RH (Cowl side J/B RH)

WIRING DIAGRAM

Dtc B2762 Intrusion Sensor Signal Circuit Malfunction. THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - PERSONAL LIGHT ASSEMBLY)
Dtc B2762 Intrusion Sensor Signal Circuit Malfunction. THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

Disconnect the J75 ECU connector and R5 light connector.

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

  • Standard resistance:
  • Symbol (Tester Connection)Specified Condition
    ISIF (J75-13) - IOUT (R5-25)Below 1 Ω
    ISIF (J75-13) - Body ground10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
2.CHECK OPERATION OF INTRUSION SENSOR

Temporarily replace the personal light assembly with a new or normally functioning sensor.

Check if the DTC B2762 is not output.

  • OK:
  • DTC B2762 is not output.
NG
REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)
OK
REPLACE PERSONAL LIGHT ASSEMBLY (INTRUSION SENSOR)