ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

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

The acceleration sensor detects the vehicle's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the acceleration sensor and the CAN communication system, the DTC 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. 1 fuse

  • Acceleration sensor

  • Acceleration sensor power source circuit

WIRING DIAGRAM

Refer to DTCs C1243 and C1245 Click here.

INSPECTION PROCEDURE

Note


  • When replacing the acceleration sensor, perform calibration Click here.

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

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (IG)


    1. Disconnect the G52 acceleration sensor connector.

    2. A01DTX5E06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Acceleration Sensor)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G52-4 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Disconnect the G52 acceleration sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G52-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC


    1. Reconnect the acceleration sensor connector.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Perform a road test.

    5. 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 ACCELERATION SENSOR Click here

    A

    USE SIMULATION METHOD TO CHECK Click here