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С2200
OPERATION
ASC-ECU controls ASC by calculating the data sent from the wheel speed sensor, the steering wheel sensor, and the G and yaw rate sensor.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is stored when ASC-ECU has malfunction.
PROBABLE CAUSES
ASC-ECU malfunction
С1200
OPERATION
ASC-ECU contains the power supply circuit (+BV terminal) for the solenoid valve. The solenoid valve is energised by the valve relay, which is incorporated in ASC-ECU.
The valve relay, which is incorporated in ASC-ECU, is always energising the solenoid valve unless the initial check is in progress when the ignition switch is turned on, and the recurrent system check is in progress.
ASC-ECU activates the solenoid valve by turning on its driving transistor.
DIAGNOSIS CODE SET CONDITIONSThese diagnosis codes will be stored under the cases below:
The solenoid valve is not energised even after ASC-ECU has turned on the driving transistor (Open circuit is present in the power supply circuit to the ASC-ECU solenoid valve, or the valve relay has failed).
After ASC-ECU has turned off the driving transistor, the solenoid valve still remains energised (short in the solenoid valve circuit).
When a solenoid valve failure is detected
PROBABLE CAUSES
ASC-ECU malfunction