- 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: RM100000000VIW4 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1436; Yaw Rate Sensor Malfunction; 2016 - 2017 MY Sienna [12/2015 - 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 via the CAN communication system (w/ VDIM).
- The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system (w/o VDIM).
The yaw rate sensor has a built-in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is a malfunction in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are set.
These DTCs are also output when calibration has not been completed.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1436 |
Either of the following is detected: |
|
WIRING DIAGRAM
Refer to DTCs C1232, C1243 and C1245 (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1232,C1243,C1245; Acceleration Sensor Stuck Malfunction+](/t3Portal/stylegraphics/info.gif)
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing the brake actuator assembly or yaw rate and acceleration sensor, perform zero point calibration and store system information (See page
).
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 AND ACCELERATION 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) According to the display on the Techstream, read the Data List.
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 that the yaw rate and acceleration sensor output value displayed on the Techstream.
Result
|
Result |
Proceed to |
|---|---|
|
The yaw rate and acceleration sensor output value is within +/- 6 degrees/s when the vehicle is stationary, but the value fluctuates when turning (w/ VDIM) |
A |
|
The yaw rate and acceleration sensor output value is within +/- 6 degrees/s when the vehicle is stationary, but the value fluctuates when turning (w/o VDIM) |
B |
|
The yaw rate and acceleration sensor output value is not within +/- 6 degrees/s when the vehicle is stationary (w/ VDIM) |
C |
|
The yaw rate and acceleration sensor output value is not within +/- 6 degrees/s when the vehicle is stationary (w/o VDIM) |
D |
|
OK |
E |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (See page
).
| B |
|
| C |
|
| D |
|
| E |
|
USE SIMULATION METHOD TO CHECK (See page
|
|
|
2. |
CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the yaw rate and acceleration sensor 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.
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (See page
).
| OK |
|
| NG |
|
|
3. |
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 is tightened to the specified torque.
The sensor is not 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 (See page
).
| OK |
|
| NG |
|
|
|