Dtc C1420 Acceleration Sensor Malfunction

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

REPLACE YAW RATE AND ACCELERATION SENSOR

DTC C1420 Acceleration Sensor 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 (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, C1245 (YARIS_NCP93 RM000001RFV0AMX.html).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the yaw rate and acceleration sensor, perform the zero point calibration (YARIS_NCP93 RM000000XHR06QX.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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 (YARIS_NCP93 RM000000YUO0DIX.html).
1.CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

  1. Check that the yaw rate and acceleration sensor has been installed properly (YARIS_NCP93 RM000001BYS012X.html).

    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 (YARIS_NCP93 RM000001BYS012X.html)
OK


2.REPLACE YAW RATE AND ACCELERATION SENSOR

  1. Replace the yaw rate and acceleration sensor (YARIS_NCP93 RM000001BYV012X.html).

    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (YARIS_NCP93 RM000000XHT08IX.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 (YARIS_NCP93 RM000000XHN0AXX.html).

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