ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1381/97

DTC Code DTC Name
C1381/97 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

This DTC is stored when the skid control ECU assembly receives a sensor supply voltage malfunction signal from the yaw rate sensor.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1381/97 Acceleration Sensor Power Supply Voltage Malfunction 315 At a vehicle speed of 3 km/h (2 mph) or more, a supply voltage malfunction signal is received from the sensor for 10 seconds or more.

  • Improperly connected connector, deformation or corrosion of terminals

  • Acceleration sensor (Yaw rate sensor) power supply

  • Skid control ECU assembly

 ABS DTC
DTC No. Brake warning light / yellow (minor malfunction) code ABS warning light code Slip indicator light code Brake hold standby indicator light code
C1381 36 97 43 21

WIRING DIAGRAM

B0049Y5E19

CAUTION / NOTICE / HINT

Note


  • When replacing the yaw rate sensor, perform initialization and calibration of the linear solenoid valve.

    Click here

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IG TERMINAL)


    1. B004ALYC50
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor)

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

    2. Disconnect the P35 yaw rate sensor connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      P35-4 (IG) - Body ground Power switch on (IG) 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. B0049SMC07
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor)

      Turn the power switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P35-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  3. RECONFIRM DTC


    1. Reconnect the P35 yaw rate sensor connector.

    2. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Turn the power switch off.

    4. Turn the power switch on (READY).

    5. Perform a road test.

    6. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1381/97 is not output. A
      DTC C1381/97 is output. B

      Note

      Check the yaw rate sensor signal after replacement.

      Click here


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE YAW RATE SENSOR Click here