Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (CAN COMMUNICATION SYSTEM)

CHECK TERMINAL VOLTAGE (IG2 TERMINAL)

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

RECONFIRM DTC

DTC C1381 Acceleration Sensor Power Supply Voltage Malfunction


DESCRIPTION

The skid control ECU (master cylinder solenoid) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0124 (malfunction in CAN communication with the acceleration sensor) are stored.
These DTCs are also stored when calibration has not been completed.

DTC Code
DTC Detection Condition
Trouble Area
C1381
At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more.
  1. A/BAG-IG2 fuse
  2. Yaw rate and acceleration sensor (Airbag sensor assembly)
  3. Yaw rate and acceleration sensor (Airbag sensor assembly) power source circuit

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. After replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform calibration (Click here).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK DTC (CAN COMMUNICATION SYSTEM)

  1. for LHD (with Central Gateway ECU):
    Check for DTCs (Click here).

  1. for LHD (without Central Gateway ECU):
    Check for DTCs (Click here).

  1. for RHD (with Central Gateway ECU):
    Check for DTCs (Click here).

  1. for RHD (without Central Gateway ECU):
    Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    CAN DTC is not output
    		A
    CAN DTC is output (for LHD (with Central Gateway ECU))
    		B
    CAN DTC is output (for LHD (without Central Gateway ECU))
    		C
    CAN DTC is output (for RHD (with Central Gateway ECU))
    		D
    CAN DTC is output (for RHD (without Central Gateway ECU))
    		E


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

D
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

E
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A


2.CHECK TERMINAL VOLTAGE (IG2 TERMINAL)
NOTICE:
  1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
  2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

  1. Turn the ignition switch off.

  1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

  1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

  1. Disconnect the E50 yaw rate and acceleration sensor (airbag sensor assembly) connector.

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

  1. Turn the ignition switch ON.

  1. Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E47-21 (IG2) - Body ground
    		Ignition switch ON
    		11 to 16 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Yaw Rate and Acceleration Sensor [Airbag Sensor Assembly])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (GND TERMINAL)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

  1. Turn the ignition switch off.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E47-25 (E1) - Body ground
    		Always
    		Below 1 Ω
    E47-26 (E2) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Yaw Rate and Acceleration Sensor [Airbag Sensor Assembly])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.RECONFIRM DTC

  1. Reconnect the E47 yaw rate and acceleration sensor (airbag sensor assembly) connector.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Perform a road test.

  1. Check if the same DTC is output (Click here).


Result
Result
Proceed to
DTC C1381 is not output
A
DTC C1381 is output
B


B
REPLACE AIRBAG SENSOR ASSEMBLY (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)