Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK INTRUSION SENSOR (IOUT)

CHECK HARNESS AND CONNECTOR (MAP LIGHT - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND)

DTC B2762 Intrusion Sensor Signal Circuit Malfunction


DESCRIPTION

  1. The intrusion sensor (theft warning ultrasonic 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 line, the certification ECU (smart key ECU assembly) stores this DTC.

DTC Code
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 line circuit is open
  2. Reception of signals other than normal/ trouble signal
  1. Map light assembly
  2. Certification ECU (smart key ECU assembly)
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction


INSPECTION PROCEDURE

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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction

  1. Disconnect the map light assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    R7-15 (+B2) - Body ground
    		Always
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R7-3 (GND5) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Map Light Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK INTRUSION SENSOR (IOUT)


  1. Using an oscilloscope, check the waveform.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2762 Intrusion Sensor Signal Circuit Malfunction


    Text in Illustration
    *a
    		Component with harness connected
    (Map Light Assembly)
    		*b
    		IOUT Initial Signal
    *c
    		IOUT Initial Response
    		*d
    		Approximately 1.0 seconds
    *e
    		Initial Diagnosis
    		*f
    		Approximately 1.0 to 1.6 seconds
    *g
    		Approximately 0.05 seconds
    		*h
    		Approximately 5.5 seconds
    *i
    		Disarmed State
    		*j
    		Arming Preparation State
    Measurement Condition
    Tester Connection
    		Content
    Tester Connection
    		R7-12 (IOUT) - Body ground
    Tool Setting
    		2 V/DIV., 100 ms./DIV.
    Condition
    		Theft deterrent system is set (system changes from disarmed state to arming preparation state)
    HINT:
    1. If the intrusion sensor is normal, an initial response is output in response to the HI input from the certification ECU (smart key ECU assembly).
    2. If the waveform output remains LO, there may be a problem with the certification ECU (smart key ECU assembly), as there is no input from the certification ECU (smart key ECU assembly).
    OK:
    The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).
    Result
    Result
    		Proceed to
    NG (Waveform output remains LO)
    		A
    NG (There is no initial response and the waveform output remains HI)
    		B
    OK (There is an initial response)
    		C


B
REPLACE MAP LIGHT ASSEMBLY (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (MAP LIGHT - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND)

  1. Disconnect the R7 map light assembly connector.

  1. Disconnect the E30 certification ECU (smart key ECU assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R7-12 (IOUT) - E30-4 (IOUT)
    		Always
    		Below 1 Ω
    R7-12 (IOUT) or E30-4 (IOUT) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)