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VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

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DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction
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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.

  • ECU-IG No. 2 fuse

  • ECU-B1 fuse

  • Yaw rate sensor assembly

  • Yaw rate sensor assembly power source circuit
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WIRING DIAGRAM

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

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INSPECTION PROCEDURE

Note:

  • After replacing the yaw rate sensor assembly, perform calibration (Click here).

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

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PROCEDURE


  1. Click here

    CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs (Click here).

      Table 1. Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (for LHD) B
      CAN DTC is output (for RHD) C

  2. Click here

    CHECK HARNESS AND CONNECTOR (IG/+B TERMINAL)


    1. Turn the ignition switch off.

    2. Disconnect the yaw rate sensor assembly connector.

    3. A015886E50

      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
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

  3. Click here

    CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Turn the ignition switch off.

    2. A015886E51

      Disconnect the yaw rate sensor assembly connector.

    3. 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
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

  4. Click here

    RECONFIRM DTC


    1. Reconnect the yaw rate sensor assembly connector.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch off.

    4. Start the engine.

    5. Perform a road test.

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

      Table 4. Result
      Result Proceed to
      DTC C1381 is not output A
      DTC C1381 is output B

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    CHECK FOR INTERMITTENT PROBLEMSClick here

  6. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    REPLACE YAW RATE SENSOR ASSEMBLYClick here

  9. Click here

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

  10. Click here

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