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 HARNESS AND CONNECTOR (IG/+B 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 sensor assembly via the CAN communication system.
The yaw rate sensor assembly has a built-in 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 sensor assembly and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and 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. ECU-IG No. 2 fuse
  2. ECU-B1 fuse
  3. Yaw rate sensor assembly
  4. Yaw rate sensor assembly power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (Click here).

INSPECTION PROCEDURE

NOTICE:
  1. After replacing the yaw rate 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. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    CAN DTC is not output
    		A
    CAN DTC is output (for LHD)
    		B
    CAN DTC is output (for RHD)
    		C


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)
A


2.CHECK HARNESS AND CONNECTOR (IG/+B TERMINAL)

  1. Turn the ignition switch off.

  1. Disconnect the yaw rate sensor assembly connector.



    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
    		Condition
    		Specified Condition
    E50-4 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
    E50-6 (+B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Yaw Rate 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. Disconnect the yaw rate sensor assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E50-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Yaw Rate Sensor Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.RECONFIRM DTC

  1. Reconnect the yaw rate 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 YAW RATE SENSOR ASSEMBLY (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)