Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TERMINAL VOLTAGE (IG TERMINAL)

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

RECONFIRM DTC

DTC C1381 Acceleration Sensor Power Supply Voltage Malfunction


DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the yaw rate sensor assembly via the CAN communication system.
The yaw rate sensor assembly has a built-in acceleration sensor.
If there is trouble in the bus lines between the yaw rate sensor and the CAN communication system, DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are stored.
DTC C1381 is 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&GAUGE fuse
  2. Acceleration sensor (Yaw rate sensor assembly)
  3. Yaw rate sensor assembly power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (Toyota Fortuner RM000001RFV0B3X.html).

INSPECTION PROCEDURE

NOTICE:
  1. After replacing the yaw rate sensor assembly, perform calibration (Toyota Fortuner RM000000XHR06WX.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  3. Before disconnecting the connector, make sure that there are no problems with the connection.
  4. After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.
1.CHECK TERMINAL VOLTAGE (IG TERMINAL)

  1. Turn the ignition switch off.

  1. Disconnect the yaw rate sensor assembly connector.



    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control 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
    Y1-4 (IG) - Body ground
    		Ignition switch ON
    		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


2.CHECK HARNESS AND CONNECTOR (GND TERMINAL)

  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
    Y1-1 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.RECONFIRM DTC

  1. Clear the DTC (Toyota Fortuner RM000000XHV0C7X.html).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Drive the vehicle at a speed of 3 km/h (2 mph) or more for at least 10 seconds.

  1. Check if the same DTC is output (Toyota Fortuner RM000000XHV0C7X.html).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B
    HINT:
    If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next suspected area (Toyota Fortuner RM000000XHN0BDX.html).


B
REPLACE YAW RATE SENSOR ASSEMBLY (Toyota Fortuner RM000000SS5045X.html)
A

USE SIMULATION METHOD TO CHECK (Toyota Fortuner RM0000012Q9013X.html)