B2763 S+B line is short circuited

DESCRIPTION

The intrusion sensor (theft warning sensor) detects any moving object by using ultrasonic waves and outputs the signals to inform the multiplex network body ECU of an intrusion, so that the theft deterrent system can set off the alarm.
When the theft deterrent system is switching to the arming preparation state, the intrusion sensor is supplied with S+B by the multiplex network body ECU. This causes the theft deterrent system to set off the alarm when the signal is output from the intrusion sensor in a situation such as when the window glass is broken.
This DTC is output when the S+B line, which is the power supply line to the sensor, is short circuited.

DTC No.	DTC Detection Condition	Trouble Area
B2763	S+B line is short circuited	Intrusion sensor (Theft warning sensor) Wire harness Multiplex network body ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (THEFT WARNING SENSOR ASSEMBLY - MULTIPLEX NETWORK BODY ECU)

1. Disconnect the O2 light connector and B7 ECU connector.

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

   Resistance:

   Symbol (Tester Connection)	Specified Condition
   SIG (O2-9) - B7-11 (S+B)	Below 1 Ω
   SIG (O2-9) - Body ground	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. CHECK THEFT WARNING SENSOR SUB-ASSEMBLY (PERSONAL LIGHT ASSEMBLY)

1. Check that the DTC disappears when a normally functioning theft warning sensor sub-assembly is installed.

   OK:

   DTC B2763 is not output.
   

NG	REPLACE INSTRUMENT PANEL J/B ASSEMBLY

OK
REPLACE PERSONAL LIGHT ASSEMBLY