Brake servo vacuum pump relay if fitted 5.
Audi a4 ecm relay.
The ecm relay also has a second large wire that also gets power from the power 30 terminal.
Without it the entire engine management system will be disabled and the vehicle will not run.
F2 10a rear window blind circuit breaker.
For this reason if you suspect that your ecm power relay may be having an issue have the vehicle inspected by a professional technician such as one from yourmechanic to determine if the relay should be replaced.
So far i know that the ecu gets constant always on 12v at pin 62 switched power at pin 3 and grounds are pins 1 2.
Ignition auxiliary circuits relay.
Horn relay dual tone.
For audi a4 b5 audi s4 1994 1995 1996 1997 1998 1999 2000 2001 model year.
Power steering control module servotronic if fitted 3.
Relay box audi a4 b6.
But i am sure the ecm relay is working correctly.
It s 3 layers deep under the tcm under the ecm in the.
Finally found my ecm relay location.
A new relay fixed the problem and the car started right up.
The ecm power relay is one of the most important relays as it provides power for the vehicle s computer system.
Fuse box in engine compartment.