- With the vehicle stationary, the yaw rate and acceleration sensor output value is not 0 deg/s.
- Abnormal comparison value.
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018KEZ |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1436; Yaw Rate Sensor Malfunction; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
C1436 |
Yaw Rate Sensor Malfunction |
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is set. These DTCs are also output when calibration has not been completed.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1436 |
Any of the following is detected: |
Yaw rate and acceleration sensor (airbag sensor assembly) |
CAUTION / NOTICE / HINT
NOTICE:
When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration and store system information (See page
![2018 - 2020 MY Sienna [11/2017 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.gif)
).
HINT:
When DTC U0123, U0124 and/or U0126 is output together with DTC C1436, inspect and repair the trouble areas indicated by DTC U0123, U0124 and/or U0126 first (See page
).
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (YAW RATE SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
(e) Select the Data List using the Techstream (See page
).
ABS/VSC/TRAC
|
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 |
- |
|
Yaw Rate Sensor2 |
Yaw rate sensor 2 / Min.: -128 °/s, Max.: 127 °/s |
Vehicle stopped: 0° /s Turning right: -128 to 0° /s Turning left: 0 to 127° /s |
- |
(f) Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.
|
Result |
Proceed to |
|---|---|
|
NG (The yaw rate and acceleration sensor (airbag sensor assembly) output value is 0 °/s when the vehicle is stationary, but the value fluctuates when turning.) |
A |
|
NG (The yaw rate and acceleration sensor (airbag sensor assembly) output value is not 0 °/s when the vehicle is stationary.) |
B |
|
OK |
C |
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement (See page
).
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 (See page
).
| B |
|
| C |
|
|
|
2. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly (See page
).
OK:
The sensor should be tightened to the specified torque.
The sensor should not be installed in a tilted position.
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement (See page
).
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 (See page
).
| OK |
|
| NG |
|
|
|