Dtc B2764 Short To Gnd In Intrusion Sensor Signal Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK INTRUSION SENSOR (IOUT)

CHECK INTRUSION SENSOR (IOUT)

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

DTC B2764 Short to GND in Intrusion Sensor Signal Circuit


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 ISIF line, the certification ECU (smart key ECU assembly) stores this DTC.

DTC Code
DTC Detection Condition
Trouble Area
B2764
After normal/trouble signal is output from intrusion sensor as result of self-diagnosis, following malfunctions are detected:
  1. IOUT line circuit is shorted to ground
  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 B2764 Short To Gnd In Intrusion Sensor Signal Circuit


INSPECTION PROCEDURE

1.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 B2764 Short To Gnd In Intrusion Sensor Signal Circuit


    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).


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (Click here)

2.CHECK INTRUSION SENSOR (IOUT)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2764 Short To Gnd In Intrusion Sensor Signal Circuit

  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
    R7-12 (IOUT) - R7-3 (GND5)
    		Immediately after theft deterrent system set
    Result
    Result
    		Proceed to
    IOUT voltage is below 1 V when theft deterrent system is set
    		A
    IOUT voltage is 6.5 V or higher when theft deterrent system is set
    		B
    HINT:
    With connector R7 of the map light assembly disconnected, measure the voltage at IOUT when the theft deterrent system is set.


B
REPLACE MAP LIGHT ASSEMBLY (Click here)
A


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

  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)