Air pump switchover valve - fault code description, ME-SFI - AD07.61-P-4000-78M

		Air pump switchover valve (Y32)
1A	Fault code ME2.7.1  (Fault code according to OBD)	P2024 (P0412)
1B	Fault code ME2.7.2	P2024-(1) Short-circuit to positive (P0414)
	(Fault code according to OBD)	P2024-(2) Short-circuit to ground (P0412) P2024-(4) Line discontinuity (P0413)
2	Fault storage	After expiry of test duration and fault
	Actuation of engine diagnosis indicator lamp (EURO4) or CHECK ENGINE (MIL)	Following two successive driving cycles with faults
3	Checking frequency	Continuous
4	Checked signal or status	Current/voltage test on air pump switchover valve
5	Fault setting conditions
	Short circuit to ground	Voltage lower than 4 volts
	Short circuit to positive	Current higher than 4.2 A
	Open circuit in wiring	No voltage at charge air cooler circulation pump relay ca. 4 to 8 V on the under no load output of the ME control unit
7		Actuation of the air pump switchover valve is checked for to detect a cable breakage and short-circuit (to ground or battery voltage). A short circuit to ground and a cable breakage will be recognized when the output stages are locked, while a short circuit to the battery voltage is recognized when the output stages are conducting. The output stage is immediately no longer activated when a fault arises.