Dtc C1440 Steering Angle Sensor Unusual Bank Angle Detected

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK YAW RATE AND DECELERATION SENSOR INSTALLATION

READ VALUE USING INTELLIGENT TESTER (MOMENTARY INTERRUPTION)

REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - YAW RATE AND DECELERATION SENSOR)

RECONFIRM DTC

DTC C1440 Steering Angle Sensor Unusual Bank Angle Detected


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.
If there is trouble in the bus lines between the yaw rate and deceleration sensor and the CAN communication system, the DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the deceleration sensor) are output.

DTC Code
DTC Detection Condition
Trouble Area
C1440
The skid control ECU detects that the vehicle is driving on a bank at an angle of 30 degrees or more.
Yaw rate and deceleration sensor

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1440 Steering Angle Sensor Unusual Bank Angle Detected


INSPECTION PROCEDURE

NOTICE:
  1. Before proceeding with the inspection, explain to the customer that the vehicle driving record shows that the vehicle was driven on a bank at an angle of 30°, and confirm that this condition occurred.
  2. 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 C1440, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first (RAV4_ACA30 RM000000YUO048X.html).
1.CHECK DTC

  1. Clear the DTC (RAV4_ACA30 RM000000ONJ027X.html).

  1. Turn the ignition switch off.

  1. At a speed of 30 km/h (19 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

  1. Turn the ignition switch to ON again and check that no CAN communication system DTC is output (RAV4_ACA30 RM000001W16002X.html).

    Result:

    Result
    		Proceed to
    DTC is output.
    		C1440
    		A
    Relating to CAN communication system
    		B
    Relating to yaw rate and deceleration sensor
    		C
    DTC is not output.
    		D
    HINT:
    DTC C1440 may have been stored because the vehicle was driven on a bank at an angle of 30° or more.


B
GO TO CAN COMMUNICATION SYSTEM (RAV4_ACA30 RM000001W16002X.html)

C
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (RAV4_ACA30 RM000000XHU03CX.html)

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


2.CHECK YAW RATE AND DECELERATION SENSOR INSTALLATION

  1. Turn the ignition switch off.

  1. Check that the yaw rate and deceleration sensor has been installed properly (RAV4_ACA30 RM000001XVO00CX_01_0001.html).

    OK:
    The sensor should be tightened to the specified torque.
    The sensor should not be tilted.


NG
INSTALL YAW RATE AND DECELERATION SENSOR CORRECTLY (RAV4_ACA30 RM000001XVO00CX.html)
OK


3.READ VALUE USING INTELLIGENT TESTER (MOMENTARY INTERRUPTION)

  1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to the DTC (RAV4_ACA30 RM000000XHS04QX.html).

    ABS/VSC/TRC
    Tester Display
    		Measurement
    Item/Range
    		Normal Condition
    		Diagnostic Note
    Yaw Rate Open
    		Yaw rate sensor open detection /
    ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    Deceleration Open
    		Deceleration sensor open detection /
    ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    OK:
    There are no momentary interruptions
HINT:
Perform the above inspection before removing the sensor and connector.


NG
Go to step 4
OK

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

4.REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - YAW RATE AND DECELERATION SENSOR)

  1. Turn the ignition switch off.

  1. Repair or replace the harness or connector.

  1. Check for any momentary interruption between the skid control ECU and yaw rate and deceleration sensor (RAV4_ACA30 RM000000XHS04QX.html).


NEXT


5.RECONFIRM DTC

  1. Clear the DTC (RAV4_ACA30 RM000000ONJ027X.html).

  1. Turn the ignition switch off.

  1. At a speed of 30 km/h (19 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

  1. Check if the same DTC is output (RAV4_ACA30 RM000000ONJ027X.html).



B
END
A

REPLACE YAW RATE SENSOR ASSEMBLY (RAV4_ACA30 RM000001XVQ009X.html)