A4 Sedan L4-1.8L Turbo (AWM) (2001)
^
Check wiring from contact 1 on the connector via the fuse to the fuel pump relay for an open circuit:
If the LED lights up:
^
Check actuation.
Checking actuation
^
Connect voltage tester VAG 1527 B to contacts 1 (positive) and 2 of connector.
^
Initiate output Diagnostic Test Mode (DTM) and activate secondary air injection solenoid valve N112-.
-
LED must flash.
If the LED lamp does not flash or if it lights up continuously:
^
Connect VAG 1598/31 test box to wiring harness leading to engine control module; engine control module should not be connected:
^
Check for open circuit and short to positive or Ground in the wiring connection:
^
Repair any open/short circuit as necessary.
If the wiring is OK
^
Replace engine control module.