DTC    C1420    Acceleration Sensor Malfunction

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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 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are set.
These DTCs are also output when calibration has not been completed.

DTC Code
DTC Detection Condition
Trouble Area
C1420
After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or more for 60 seconds or more.
  1. Sensor installation
  2. Yaw rate and acceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate and deceleration sensor, perform the following procedures:
For the VSC system, clear and then reobtain the zero point calibration (Click here).
For the CVT system, perform "Reset Memory", "Deceleration Sensor 0 Point Calibration", and "CVT Oil Pressure Calibration" (for K41A Click here, for K41B Click here).

HINT:
When U0123, U0124 and/or U0126 is output together with C1420, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first (Click here).

1.CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

  1. Check that the yaw rate and acceleration sensor has been installed properly (Click here).

    OK:
    The sensor should be tightened to the specified torque.
    The sensor should not be installed in a tilted position.



NG
INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY (Click here)
OK


2.REPLACE YAW RATE AND ACCELERATION SENSOR

  1. Replace the yaw rate and acceleration sensor (Click here).

    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (Click here).

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).


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