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 Condition	Trouble Area
B2763	S+B line is shorted	Intrusion sensor Wire harness Main body ECU RH (Cowl side J/B RH)

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

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

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 ground 10 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.

NG

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

OK

REPLACE PERSONAL LIGHT ASSEMBLY (INTRUSION SENSOR)

LEXUS IS250, IS220d / GSE20 ALE20

Tester Connection	Specified Condition
R5-5 - Body ground	10 to 14 V