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by ian durston
Sun Mar 27, 2016 9:19 pm
Forum: Diagnostic discussion
Topic: 4 wire egr valve feedback
Replies: 3
Views: 6535

4 wire egr valve feedback

Can anybody please explain how the feedback signal is generated on a 4 wire egr valve.the valve in question is fitted on a vaux zafira 2 litre Diesel engine code y20 dth. It has a power and ground a duty cycle control [battery volts] to ground and what looks like a duty cycle feedback [4.5 volts] to...