| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AZ87 |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - 08/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1436; Malfunction in Yaw Rate Sensor; 2019 - 2021 MY Avalon [04/2018 - 08/2021] | ||
|
DTC |
C1436 |
Malfunction in Yaw Rate Sensor |
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.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1436 |
Malfunction in Yaw Rate Sensor |
Difference between the yaw rate sensor value and the control value estimated inside the skid control ECU (brake actuator assembly) is abnormal. |
|
CAUTION / NOTICE / HINT
NOTICE:
After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform system variant learning and acceleration sensor zero point calibration.
Click here
![2019 - 2021 MY Avalon [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): CALIBRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Yaw Rate Sensor |
Yaw rate sensor |
Min.: -128°/s, Max.: 127°/s |
Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s |
- |
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
|---|
|
Yaw Rate Sensor |
(d) Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.
|
Result |
Proceed to |
|---|---|
|
The value of Yaw Rate Sensor is 0°/s when the vehicle is stopped and the output value fluctuate when the vehicle turning right or left |
A |
|
The value of Yaw Rate Sensor is not 0°/s when the vehicle is stopped |
B |
|
The value of Yaw Rate Sensor is 0°/s when the vehicle is stopped and the output value does not fluctuate when the vehicle turning right or left |
C |
| B |
|
REPLACE AIRBAG SENSOR ASSEMBLY
|
| C |
|
|
|
2. |
CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION |
(a) Turn the engine switch off.
(b) Drive the vehicle straight ahead at 15 km/h (9 mph) or more for at least 1 second.
(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
|
|
|
3. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.
Click here
OK:
The yaw rate and acceleration sensor (airbag sensor assembly) is tightened to the specified torque.
The yaw rate and acceleration sensor (airbag sensor assembly) is not installed in a tilted position.
| OK |
|
REPLACE AIRBAG SENSOR ASSEMBLY
|
| NG |
|
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY
|
|
|