Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT YAW RATE AND DECELERATION SENSOR (IG TERMINAL)

INSPECT YAW RATE AND DECELERATION 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 deceleration sensor via the CAN communication system.
The yaw rate sensor has a built-in deceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and deceleration sensor 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.

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 deceleration sensor power source circuit
  2. Yaw rate and deceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (RAV4_ACA30 RM000001RFV02MX_02.html).

INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate sensor assembly, perform zero point calibration (RAV4_ACA30 RM000001K1O00SX.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 (RAV4_ACA30 RM000000YUO048X.html).
1.INSPECT YAW RATE AND DECELERATION SENSOR (IG TERMINAL)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction

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

  1. Disconnect the yaw rate and deceleration 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
    K25-4 (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 DECELERATION SENSOR (GND TERMINAL)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.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
    K25-1 (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 deceleration sensor connector.

  1. Clear the DTCs (RAV4_ACA30 RM000000ONJ027X.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 output (RAV4_ACA30 RM000000ONJ027X.html).

    Result:
    Result
    		Proceed to
    DTC (C1381) is not output.
    		A
    DTC (C1381) is output.
    		B
    NOTICE:
    Check the yaw rate and deceleration sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.html).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (RAV4_ACA30 RM000000OS701UX.html).


B
REPLACE YAW RATE SENSOR ASSEMBLY (RAV4_ACA30 RM000001XVQ009X.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (RAV4_ACA30 RM00000135201PX.html)