90CS Quattro V6-2.8L (AAH) (1994)
Fuel Pump Relay: Testing and Inspection
Checking function
Note:
The fuel pump relay is located in the fuse/relay panel, on the left side under the instrument panel.
-
Remove shelf in left front footwell.
-
Remove lower right A-pillar trim.
-
Fold back carpet in right front footwell.
-
Remove cover from electronics box.
Central Electronics Box
-
Remove HO2S circuit breaker -2- (-S73- in brown holder) and injector valve circuit breaker -3- (-S72- in red holder).
-
Remove fuse 17 from fuse holder.
-
Connect US 1115 LED tester or equivalent between Ground (GND) and one terminal for fuse 17, using adapter cables from VW 1594
connector test kit.
-
Operate starter briefly.
^
Fuel pump relay must be activated (can be felt and heard)
^
LED tester must light up
If fuel pump relay is NOT activated:
-
Check activation of fuel pump relay.
If LED tester does NOT light up:
-
Repeat test on other terminal for fuse 17.
If LED tester still does NOT light up:
Central Electric Panel With Detail Of Relay Position 6
-
Check wiring connection for continuity between fuse 17 and terminal 30 at relay position 6 per wiring diagram.
-
Repair open circuit in wiring, if necessary.