ME-SFI EGR transducer - Fault code description - AD07.61-P-4000-51A

1	Fault code		P0400
2	Fault storage		Following the expiry of the test duration and fault
	Activation of the engine diagnosis (EURO3/4) or CHECK ENGINE (MIL) malfunction indicator lamp		Following two consecutive driving cycles with fault
3	Frequency of the test		Continuously
4	Checked signal or status		Current/voltage test at the EGR transducer
5	Fault setting conditions		Voltage < 2.5 V
	Limit values		Current > 4.2 A
		Short-circuit to ground	No voltage at the EGR transducer
		Short-circuit to + 12 V	Approx. 4 - 8 V at the non-loaded output of the ME-SFI control module
		Cable interruption	Approx. 1 s
	Duration of test
6	Test prerequisites		Battery voltage between 8 -17.1 V
7			A check is carried out for lead interruption and short-circuit (to ground or battery voltage). In blocked output stage status, short-circuit to ground and lead interruption are detected, whilst short-circuit to battery voltage is detected with output stage conduction. In the event of a fault, the output stage is no longer activated with immediate effect.