S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
If specification is obtained:
Check voltage supply
-
Connect VAG1527 B between following sockets on harness connector:
-
Switch ignition on.
-
The LED must come on
If LED does not come on:
-
Check wire connection from terminal 2 of connector for open circuit (fuse) or short circuit to Ground (GND).
-
If necessary eliminate open circuit or short circuit to Ground (GND)
If LED comes on:
Check activation
-
Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself.
Test the following wiring connections for open circuits and short to B+ or Ground (GND):
-
Repair any open/short circuit as necessary.