DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw rate and acceleration (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 yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are stored.
These DTCs are also output when calibration has not been completed.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1210 |
Zero point calibration of the yaw rate sensor is incomplete. |
|
C1336 |
Zero point calibration of the acceleration sensor is incomplete. |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check for DTCs (See page ).
Result
Result |
Proceed to |
---|---|
CAN DTC is not output |
A |
CAN DTC is output |
B |
B |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
2. |
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor (See page ).
|
3. |
PERFORM TEST MODE (SIGNAL CHECK) |
(a) Turn the ignition switch off.
(b) Perform the signal check in the Test Mode Procedure (See page ).
OK:
All test mode DTCs are cleared.
OK |
END |
|
4. |
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 at an angle.
NG |
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY |
|
5. |
READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
ABS/VSC/TRAC
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Deceleration Sensor |
Acceleration sensor/ Min.: -18.525 m/s2, Max.: 18.387 m/s2 |
- |
Changes continuously during acceleration/deceleration. |
Deceleration Sensor2 |
Acceleration sensor 2/ Min.: -18.525 m/s2, Max.: 18.387 m/s2 |
- |
Changes continuously during acceleration/deceleration. |
Yaw Rate Sensor |
Yaw rate sensor/ Min.: -128°/s, Max.: 127°/s |
0°/s: Vehicle stationary -128 to 0°/s: Right turn 0 to 127°/s: Left turn |
- |
(f) Check that the yaw rate and acceleration sensor output value is displayed on the Techstream.
OK:
The yaw rate and acceleration sensor output value is normal.
NOTICE:
The yaw rate and acceleration sensor (airbag sensor assembly) output value is normal (See page ).
OK |
REPLACE MASTER CYLINDER SOLENOID |
NG |
REPLACE AIRBAG SENSOR ASSEMBLY |
Ignition Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE LOWER STEERING COLUMN COVER
(a) Remove the 2 screws.
(b) Disengage the 2 claws and remove the lower steering column cover.
2. REMOVE IGNITION OR STARTER SWITCH ASSEMBLY
(a) Disconnect the connector.
(b) Disen ...
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 ...
Entry Exterior Alarm and Answer-back Buzzer do not Sound
DESCRIPTION
The smart key system (for Entry Function) uses the wireless door lock buzzer
to perform various vehicle exterior warnings. When the conditions of each warning
are met, the certification ECU (smart key ECU assembly) sends a buzzer activation
request signal to the main body ECU (mul ...