VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU (brake actuator assembly) 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 acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.

These DTCs are also output 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.

  • A/B fuse

  • Acceleration sensor (Airbag sensor assembly)

  • Acceleration sensor (Airbag sensor assembly) power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243, C1245 and C1279.

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CAUTION / NOTICE / HINT

Note:

  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

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  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration.

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  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and CVT oil pressure calibration (for continuously variable transaxle).

    K111:Click here

    K111F:Click here

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

PROCEDURE

  1. CHECK TERMINAL VOLTAGE (IG2 TERMINAL)

    Note:

    • 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.

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    • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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    1. Turn the ignition switch off.

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

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

    4. C233304C01

      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor [Airbag Sensor Assembly])

      Disconnect the G92 yaw rate and acceleration sensor (airbag sensor assembly) connector.

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

    6. Turn the ignition switch to ON.

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

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G92-21 (IG2) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

    1. Turn the ignition switch off.

    2. C233304C02

      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor [Airbag Sensor Assembly])

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G92-25 (E1) - Body ground

      Always

      Below 1 Ω

      G92-26 (E2) - Body ground

      Always

      Below 1 Ω
      Tip:

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step.

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    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  3. RECONFIRM DTC

    1. Reconnect the G92 yaw rate and acceleration sensor (airbag sensor assembly) connector.

    2. Clear the DTC.

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    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is recorded.

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    Chassis > ABS/VSC/TRC > Clear DTCs

    Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Proceed to

    DTC C1381 is not output

    DTC C1381 is output
    DTC C1381 is not output

    USE SIMULATION METHOD TO CHECK

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    DTC C1381 is output

    REPLACE AIRBAG SENSOR ASSEMBLY

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