Dtc B2762 Intrusion Sensor Signal Circuit Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (MAP LIGHT - MAIN BODY ECU)

CHECK MAP LIGHT ASSEMBLY (THEFT WARNING RADAR SENSOR)

DTC B2762 Intrusion Sensor Signal Circuit Malfunction

DTC B2764 Short to GND in Intrusion Sensor Signal Circuit


DESCRIPTION

The theft warning radar sensor (intrusion sensor) conducts a 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 line, the main body ECU stores DTC B2762.
DTC B2764 is stored when terminal IOUT of the theft warning radar sensor (intrusion sensor) has not received a signal for 5 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B2762
After a normal/trouble signal is output from the theft warning radar sensor (intrusion sensor) as a result of self-diagnosis, either of the following malfunctions is detected:
  1. The IOUT line circuit is open.
  2. Signals other than a normal/trouble signal are received.
  1. Map light assembly (theft warning radar sensor [intrusion sensor])
  2. Main body ECU
  3. Harness or connector
B2764
After a normal/trouble signal is output from the theft warning radar sensor (intrusion sensor) as a result of self-diagnosis, the following malfunction is detected:
Terminal IOUT of the theft warning radar sensor (intrusion sensor) has not received a signal for 5 seconds or more.
  1. Map light assembly (theft warning radar sensor [intrusion sensor])
  2. Main body ECU
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

  1. Disconnect the W7 light connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    W7-5 (GND3) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    W7-7 (S+B) - Body ground
    		Always
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Map Light Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (MAP LIGHT - MAIN BODY ECU)

  1. Disconnect the W7 light connector.

  1. Disconnect the G63 ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    W7-6 (IOUT) - G63-12 (ISIF)
    		Always
    		Below 1 Ω
    W7-6 (IOUT) or G63-12 (ISIF) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK MAP LIGHT ASSEMBLY (THEFT WARNING RADAR SENSOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

  1. Using an oscilloscope, check the waveform.

    Measurement Condition
    Item
    		Content
    Tester Connection
    		W7-6 (IOUT) - Body ground
    Tool Setting
    		2 V/DIV., 100 ms./DIV.
    Condition
    		Immediately after theft deterrent system set
    HINT:
    1. If the intrusion sensor is normal when the map light receives a HI input signal from the main body ECU, the sensor outputs the initial response.
    2. When the input signal from the main body ECU is LOW and does not change, the main body ECU may be malfunctioning.
    OK:
    Initial response occurs (refer to illustration).
    Text in Illustration
    *a
    		Component with harness connected
    (Map Light Assembly)
    *b
    		Waveform
    *c
    		Initial Response
    Result
    Result
    		Proceed to
    OK
    		A
    NG (Signal is LOW and does not change)
    		B
    NG (Signal is HIGH and does not change)
    		C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)

C
REPLACE MAP LIGHT ASSEMBLY (THEFT WARNING RADAR SENSOR) (LandCruiser RM000003YO9019X.html)
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)