Checking actuation
- Connect multimeter as follows to measure voltage.
Courtesy of AUDI OF AMERICA, INC.
CONNECTOR TERMINAL 4 REFERENCE (ECM POWER SUPPLY RELAY)Relay carrier in electronics box, plenum chamber, position 2
terminalMeasure to 4 Battery positive - Switch ignition on.
- Specified value: approx. battery voltage
If specified value is not attained:
- Switch ignition off.
- Connect test box VAG1598/31 to wiring harness for engine control module; do not connect engine control module. See WIRING AND COMPONENT CHECK WITH TEST BOX VAG 1598/31 .
- Check for open circuit and short to positive or ground in following wiring connection:
Courtesy of AUDI OF AMERICA, INC.
CONNECTOR TERMINAL 4, SOCKET 23 REFERENCE (ECM POWER SUPPLY RELAY)Relay carrier in electronics box, plenum chamber, position 2
terminalTest box V.A.G 1598/31
Socket4 23 - Repair any open/short circuit as necessary.
If no malfunction is found:
- Replace Motronic Engine Control Module (ECM) power supply relay -J271-.