A8L V8-4.2L (BFM) (2004)
If specified value is not obtained:
-
Connect portable multimeter for voltage measurement as follows.
Relay carrier in E-box, plenum
Measure to
chamber, position 2 Terminal
4
B+
-
Switch ignition on.
Specified value: approx. battery voltage
-
Switch ignition off.
If specified value is not obtained:
-
Connect V.A.G 1598/31 test box to wiring harness of Engine Control Module (ECM).
-
Check the following wire connection for open circuit according to wiring diagram:
Relay carrier in E-box, plenum
Measure to
chamber, position 2 Terminal
4
23
-
Check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinity Ohms (no continuity)
-
Repair open circuit in wiring or short circuit if necessary.
If no malfunctions are detected:
-
Replace Motronic Engine Control Module (ECM) Power Supply Relay -J271-.
-
Read readiness code. If DTC memory was erased, readiness code must be generated again