Lexus IS250 · Service Manual SECURITIES

B2762

Diagnostic trouble codes

DESCRIPTION

  1. 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 Condition
 Trouble Area
B2762
 After normal/trouble signal is output from intrusion sensor as result of self-diagnosis, following malfunctions are detected:
  1. IOUT - ISIF line circuit is open
  2. Reception of signals other than normal/trouble signal
  1. Intrusion sensor
  2. Wire harness
  3. Main body ECU RH (Cowl side J/B RH)

WIRING DIAGRAM

B128379E01

INSPECTION PROCEDURE


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

  1. B128380E02
    Disconnect the J75 ECU connector and R5 light connector.

  1. 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 ground
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2. CHECK OPERATION OF INTRUSION SENSOR

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

  1. 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)


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