Toyota CH-R Service Manual: Yaw Rate Sensor Malfunction (C1436)

DESCRIPTION

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

PROCEDURE

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Select the Data List using the Techstream.

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(d) Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.

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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B

REPLACE AIRBAG SENSOR ASSEMBLY

C

USE SIMULATION METHOD TO CHECK

A

(a) Turn the ignition switch off.

(b) Drive the vehicle straight ahead at 50 km/h (31 mph) or more for at least 30 seconds.

(c) Check that the steering wheel is correctly centered while driving straight ahead.

HINT:

If front wheel alignment and steering are adjusted as a result of an off-center steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.

OK:

The steering wheel is correctly centered.

NG

ADJUST FRONT WHEEL ALIGNMENT OR STEERING

OK

(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.

Click here

OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY