Driving steady at 70mph... suddenly dials drop to zero and engine shuts down.
VCDS at roadside showed 17925 'Power Supply Relay for ECU (J271 or J363): Electrical Malfunction'
Car restarted and has driven normally for about 100 miles... (sigh, a serious intermittent fault )
Appears it relates to either a faulty relay, wiring, or an ECU problem...
I tested the ECU relay (429 in pic?) and it works perfectly.
I've cleaned the ECU earth point, which didn't seem corroded
I want to remove the ECU and check the connector for corrosion etc. However, the Haynes manual states: 'after reconnecting the wiring the basic settings must be reinstated by an Audi dealer using a special test instrument (!)'
Can I unplug my ECU to check the connector without harm? (obv. with battery out)
Have I tested the correct relay?
And has anyone else had a similar fault?
Thanks a lot
VCDS at roadside showed 17925 'Power Supply Relay for ECU (J271 or J363): Electrical Malfunction'
Car restarted and has driven normally for about 100 miles... (sigh, a serious intermittent fault )
Appears it relates to either a faulty relay, wiring, or an ECU problem...
I tested the ECU relay (429 in pic?) and it works perfectly.
I've cleaned the ECU earth point, which didn't seem corroded
I want to remove the ECU and check the connector for corrosion etc. However, the Haynes manual states: 'after reconnecting the wiring the basic settings must be reinstated by an Audi dealer using a special test instrument (!)'
Can I unplug my ECU to check the connector without harm? (obv. with battery out)
Have I tested the correct relay?
And has anyone else had a similar fault?
Thanks a lot