S6 V8-4.2L (BBD) (2004)
-
Specified value: Wire resistance max 1.5 Ohms
-
If necessary, repair wire connection.
If no malfunctions are found in wires:
-
Check voltage supply of Motronic Engine Control Module (ECM) voltage supply relay -J271-.
-
Check activation of Motronic Engine Control Module (ECM) voltage supply relay -J271-.
Checking voltage supply
-
Connect multimeter for voltage measurement as follows.
Relay carrier in E-box, plenum
Measure to
chamber, position 3
Terminal
1
Engine Ground (GND)
2
Engine Ground (GND)
-
Specified value: approx. battery voltage
If specified value is not obtained:
-
Check wire connections for open circuit according to wiring diagram:
-
Specified value: Wire resistance max 1.5 Ohms
Checking activation
-
Connect multimeter for voltage measurement as follows.
Relay carrier in E-box, plenum
Measure to
chamber, position 3
Terminal
4
B+
-
Switch ignition on.
-
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