C2112 Valve Relay Error: DTC Detecting Condition

Item		Detecting Condition	Possible cause
DTC Strategy		Voltage monitoring	Open or short in power supply circuit (IGN+)
Case1	Monitoring Period	Once during startup.
Case1	Enable Conditions	Watchdog and valve relay function is tested during startup. A failure is detected if the valve relay/Enable remains in off position when it is turned on and vice versa. Reason could be short to GND or UZ, interrupted lines or a defective output stage etc.
Case2	Monitoring Period	Continuous
Case2	Enable Conditions	A Fault is detected if valve relay voltage < 0.8 * battery voltage for a time 500ms.
Case3	Monitoring Period	Continuous
Case3	Enable Conditions	If valve relay malfunction and supply solenoid valve short to battery or supply solenoid valve and medium or high ohmic short of valve relay (or a valve) to valve relay voltage, solenoid valve voltage or GND are detected.
Fail Safe		No valve actuation possible. The ABS/EBD/ESC functions are inhibited. The ABS/EBD/ESC warning lamps are activated.