S4 V8-4.2L (BHF) (2004)
Terminal
1
Engine Ground (GND)
-
Operate starter briefly.
-
Specified value: approx. battery voltage
If there is no voltage again:
-
Check wire connection from harness connector terminal 1 to Fuel Pump (FP) Relay -J17- via fuse for open circuit according to wiring diagram.
-
Specified value: Wire resistance max 1.5 Ohms
-
If necessary, repair wire connection.
If voltage supply is OK:
Check Ground (GND) activation
-
Connect multimeter for voltage measurement as follows:
Harness connector
Measure to
Terminal
2
B+
-
Operate starter briefly.
-
Specified value: approx. battery voltage
-
Switch ignition off.
If specified value is not obtained:
-
Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring and Component Test
-
Check the following wire connection for open circuit according to wiring diagram:
Harness connector
Measure to
Terminal
2
64
Specified value: Wire resistance max 1.5 Ohms
-
Check the wire for short circuit to B+ and Ground (GND).
-
Specified value: Infinite Ohms (no continuity)