Toyota CH-R Service Manual: Acceleration Sensor Malfunction (C1420)

Toyota CH-R Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Acceleration Sensor Malfunction (C1420)

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) detects an abnormality in the difference between the acceleration sensor value and the control value estimated based on the yaw rate sensor, steering angle sensor and speed sensor signals.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1420	Acceleration Sensor Malfunction	The difference between the acceleration sensor value and the control value estimated inside the skid control ECU (brake actuator assembly) is abnormal.	Sensor installation Acceleration sensor (airbag sensor assembly)

PROCEDURE

1.	CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION

(a) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.

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OK:

The airbag sensor assembly is tightened to the specified torque.

The airbag sensor assembly is not be installed in a tilted position.

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

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REPLACE AIRBAG SENSOR ASSEMBLY

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

Acceleration Sensor Internal Circuit (C1419,C1435)

DESCRIPTION These DTCs are stored when the skid control ECU (brake actuator assembly) receives an internal malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly). ...

Open in Stop Light Switch Circuit (C1425)

DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch signals and uses them to determine whether or not the brakes are applied. The skid control ECU (brake actuator ...

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Toyota CH-R Service Manual > Pre-collision System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

Toyota CH-R Service Manual: Acceleration Sensor Malfunction (C1420)

Acceleration Sensor Internal Circuit (C1419,C1435)

Open in Stop Light Switch Circuit (C1425)

Other materials:

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Toyota CH-R Service Manual