Dtc B276A Short To Gnd In Tilt 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 THEFT WARNING TILT SENSOR (YAW RATE SENSOR) (CSIF)

CHECK THEFT WARNING TILT SENSOR (YAW RATE SENSOR) (CSIF)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - THEFT WARNING TILT SENSOR [YAW RATE SENSOR])

DTC B276A Short to GND in Tilt Sensor Signal Circuit


DESCRIPTION

  1. This DTC is stored when terminal CSIF of the theft warning tilt sensor (yaw rate sensor) has not received a signal for 5 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B276A
Terminal CSIF of theft warning tilt sensor (yaw rate sensor) has not received signal for 5 seconds or more
  1. Theft warning tilt sensor (yaw rate sensor)
  2. Main body ECU (multiplex network body ECU)
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B276A Short To Gnd In Tilt Sensor Signal Circuit


INSPECTION PROCEDURE

NOTICE:
  1. If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
  2. When replacing the theft warning tilt sensor (yaw rate sensor), perform zero point calibration (Click here).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  4. w/ Door Control Battery:
    As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure (Click here).
1.CHECK THEFT WARNING TILT SENSOR (YAW RATE SENSOR) (CSIF)


  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 B276A Short To Gnd In Tilt Sensor Signal Circuit


    Text in Illustration
    *a
    		Component with harness connected
    (Main body ECU [multiplex network body ECU])
    		*b
    		CSIF Initial Signal
    *c
    		CSIF 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
    		E117-6 (GCS) - 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 theft warning tilt sensor (yaw rate sensor) is normal, an initial response is output in response to the HI input from the main body ECU (multiplex network body ECU).
    2. If the waveform output remains LO, there may be a problem with the main body ECU (multiplex network body ECU), as there is no input from the main body ECU (multiplex network body ECU).
    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 THEFT WARNING TILT SENSOR (YAW RATE SENSOR) (CSIF)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B276A Short To Gnd In Tilt Sensor Signal Circuit

  1. Disconnect the theft warning tilt sensor (yaw rate sensor) connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    E50-5 (CSIF) - E50-1 (GND)
    		Immediately after theft deterrent system set
    Result
    Result
    		Proceed to
    CSIF voltage is below 1 V when theft deterrent system is set
    		A
    CSIF voltage is 6.5 V or higher when theft deterrent system is set
    		B
    HINT:
    With connector E50 of the theft warning tilt sensor (yaw rate sensor) disconnected, measure the voltage at CSIF when the theft deterrent system is set.
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Theft Warning Tilt Sensor [Yaw Rate Sensor])


B
REPLACE THEFT WARNING TILT SENSOR (YAW RATE SENSOR) (Click here)
A


3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - THEFT WARNING TILT SENSOR [YAW RATE SENSOR])

  1. Disconnect the E117 main body ECU (multiplex network body ECU) connector.

  1. Disconnect the E50 theft warning tilt sensor (yaw rate sensor) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E117-6 (GCS) - E50-5 (CSIF)
    		Always
    		Below 1 Ω
    E117-6 (GCS) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)