VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.

The yaw rate sensor 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 and acceleration sensor 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 No.

Detection Item

DTC Detection Condition

Trouble Area

C1381

Acceleration Sensor Power Supply Voltage Malfunction

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.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor power source circuit

WIRING DIAGRAM

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

CAUTION / NOTICE / HINT

Note:

  • When replacing the yaw rate and acceleration sensor, perform calibration (Click here).

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK DTC (CAN COMMUNICATION SYSTEM)

    1. Check for DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      CAN DTC is not output

      A

      CAN DTC is output

      B
    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    A

  2. CHECK TERMINAL VOLTAGE (IG)

    1. Disconnect the G40 yaw rate and acceleration sensor connector.

    2. C208309C02

      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G40-4 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    OK

  3. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

    1. Disconnect the G40 yaw rate and acceleration sensor connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G40-1 (GND) - Body ground

      Always

      Below 1 Ω
      Note:

      Check the yaw rate and acceleration sensor signal after replacement.

      Click here

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  4. RECONFIRM DTC

    1. Reconnect the yaw rate and acceleration sensor connector.

    2. Clear the DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is output.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTC C1381 is not output

      A

      DTC C1381 is output

      B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    B

    REPLACE YAW RATE AND ACCELERATION SENSOR

    Click here