VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232,C1243,C1245 and C1279
| DTC Code | DTC Name |
|---|---|
| C1232 | Acceleration Sensor Stuck Malfunction |
| C1243 | Acceleration Sensor Stuck Malfunction |
| C1245 | Acceleration Sensor Output Malfunction |
| C1279 | Acceleration Sensor Output Voltage Malfunction (Test Mode DTC) |
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 yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (malfunction in CAN communication with the acceleration sensor) is output.
These DTCs are also output when calibration has not been completed.
DTC C1279 can be cleared when the yaw rate and acceleration sensor (airbag sensor assembly) sends a yaw rate and/or acceleration signal or the Test Mode ends. DTC C1279 is output only in the Test Mode.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
C1232 |
Acceleration Sensor Stuck Malfunction |
At a vehicle speed of 10 km/h (6 mph) or more, either GL1 or GL2 (input signal) does not change for 30 seconds or more. |
|
C1243 |
Acceleration Sensor Stuck Malfunction |
While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition that the values of GL1 and GL2 do not change 0.0294 G or more occurs 16 times or more. |
|
C1245 |
Acceleration Sensor Output Malfunction |
At a vehicle speed of 30 km/h (19 mph) or more, the difference between the forward and backward G calculated from the acceleration sensor value and that calculated from the vehicle speed exceeds 0.35 G for 60 seconds or more. |
|
C1279 |
Acceleration Sensor Output Voltage Malfunction (Test Mode DTC) |
Detected only during Test Mode. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.
When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration.
When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and CVT oil pressure calibration (for continuously variable transaxle).
K111:Click here
K111F:Click here
When U0124 and/or U0126 is output together with C1232, C1243 and/or C1245, inspect and repair the trouble areas indicated by U0124 and/or U0126 first.
PROCEDURE
CHECK DTC
Clear the DTC.
Chassis > ABS/VSC/TRC > Clear DTCs
At a speed of 30 km/h (19 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.
Check that no CAN communication system DTC is output.
for LHD:Click hereClick here
for RHD:Click hereClick here
Check if DTCs for zero point calibration of the yaw rate sensor undone (C1210) or for zero point calibration of the acceleration sensor undone (C1336) are output.
Chassis > ABS/VSC/TRC > Trouble Codes
Result
Result
Proceed to
DTC (relating to yaw rate and acceleration sensor) is output
A
DTC (relating to CAN communication system) is output (for LHD)
B
DTC (relating to CAN communication system) is output (for RHD)
C
DTC (C1210 and/or C1336) are output
D
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION
Turn the ignition switch off.
Check that the airbag sensor assembly has been installed properly.
OK
The sensor should be tightened to the specified torque.
The sensor should not be tilted position.
Result
Proceed to
OK
NG