Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)

INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)

RECONFIRM DTC

DTC 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 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are set.
These DTCs are also output 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), an acceleration sensor power source malfunction signal is received for 10 seconds or more.
  1. Yaw rate and acceleration sensor power source circuit
  2. Yaw rate and acceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (Link).

INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate and acceleration sensor, perform zero point calibration (COROLLA_ZRE142 RM000000XHR08KX.html).
HINT:
When U0123, U0124 and/or U0126 is output together with C1381, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first (COROLLA_ZRE142 RM000000YUO0J7X.html).
1.INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

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

  1. Disconnect the yaw rate and acceleration sensor connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E97-4 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)
OK


2.INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

  1. Turn the ignition switch off.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E97-1 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK


3.RECONFIRM DTC

  1. Reconnect the yaw rate and acceleration sensor connector.

  1. Clear the DTCs (COROLLA_ZRE142 RM000000XHV0F2X.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 3 km/h (2 mph) or more for at least 10 seconds.

  1. Check if the same DTC is recorded (COROLLA_ZRE142 RM000000XHV0F2X.html).

    Result:

    Result
    		Proceed to
    DTC (C1381) is not output
    		A
    DTC (C1381) is output
    		B
    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (COROLLA_ZRE142 RM000000XHT0ATX.html).
    HINT:
    If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).


B
REPLACE YAW RATE AND ACCELERATION SENSOR (COROLLA_ZRE142 RM000003D8S00IX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (COROLLA_ZRE142 RM000000XHP0EKX.html)