Dtc B2763 Intrusion Sensor +B Circuit Malfunction (Gnd Short)

Lexus IS250 IS220d GSE20 ALE20 - THEFT DETERRENT

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

DTC B2763 Intrusion Sensor +B Circuit Malfunction (GND Short)

DESCRIPTION

This DTC is output when the S+B line, which is the power supply line to the sensor, is shorted.
DTC No.DTC Detection ConditionTrouble Area
B2763S+B line is shorted
Intrusion sensor
Wire harness
Main body ECU RH (Cowl side J/B RH)

WIRING DIAGRAM

Dtc B2763 Intrusion Sensor +B Circuit Malfunction (Gnd Short). THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - PERSONAL LIGHT ASSEMBLY)
Dtc B2763 Intrusion Sensor +B Circuit Malfunction (Gnd Short). 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
    S+B (J75-11) - S+B (R5-5)Below 1 Ω
    S+B (J75-11) - Body ground10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
2.CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

Reconnect J75 ECU connector.

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

  • Standard voltage:
  • Tester ConnectionSpecified Condition
    R5-5 - Body ground10 to 14 V
NG
REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)
OK
REPLACE PERSONAL LIGHT ASSEMBLY (INTRUSION SENSOR)