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 condition. If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.
The DTCs are also output when the calibration has not been completed.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1210 |
Zero Point Calibration of Yaw Rate Sensor Undone |
Zero point calibration of yaw rate sensor undone. |
|
C1336 |
Zero Point Calibration of Acceleration Sensor Undone |
Zero Point Calibration of Acceleration Sensor Undone. |
|
CAUTION / NOTICE / HINT
NOTICE:
HINT:
When U0124 and/or U0126 is output along with C1210 and/or C1336, inspect and
repair trouble areas indicated by U0124 and/or U0126 first (See page
).
PROCEDURE
1. |
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor (See
page
).
|
2. |
PERFORM TEST MODE (SIGNAL CHECK) |
(a) Turn the ignition switch off.
(b) Using the Techstream, perform a Test Mode (signal check) inspection sensor
check and check that all Test Mode (signal check) inspection items change from incomplete
to complete (See page
).
OK:
All Test Mode (signal check) inspection items change from incomplete to complete
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 | ![]() |
END |
|
3. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the airbag sensor assembly has been installed properly (See page
).
OK:
The sensor should be tightened to the specified torque.
The sensor is not installed in a tilted position.
NG | ![]() |
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY |
|
4. |
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 |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Deceleration Sensor |
Deceleration sensor reading/ Min.: - 18.525 m/s2, Max.: 18.387 m/s2 |
- |
During deceleration/ acceleration: Changes continuously |
Deceleration Sensor2 |
Deceleration sensor 2 reading/ Min.: -18.525 m/s2, Max.: 18.387 m/s2 |
- |
During deceleration/ acceleration: Changes continuously |
Yaw Rate Sensor |
Yaw rate and deceleration sensor1/ 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.
OK:
The yaw rate and acceleration sensor (airbag sensor assembly) output value is normal.
OK | ![]() |
REPLACE BRAKE ACTUATOR ASSEMBLY |
NG | ![]() |
REPLACE AIRBAG SENSOR ASSEMBLY |
Freeze Frame Data
FREEZE FRAME DATA
1. FREEZE FRAME DATA
HINT:
Whenever a DTC is detected or the ABS operates, the skid control ECU
stores the current vehicle (sensor) state as freeze frame data.
The skid control ECU stores the number of times (maximum: 31) the ignition
switch has been turned f ...
Operation Check
OPERATION CHECK
INPUT SIGNAL CHECK
*a
+RES
*b
-SET
*c
ON-OFF
*d
CANCEL
(a) Connect the Techstream to the DLC3.
(b) Check the cruise control main switch using the Data List functio ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the RH and LH sides.
The procedure described below is for the LH side.
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
).
NOTICE:
After turning the ign ...