Volkswagen Passat 1995 Official Factory Repair Manual page 1642

Output Diagnostic Test Mode (DTM), initiating
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The Idle Air Control valve must click, until
switching to the next DTM component by
pressing the button.
If the Idle Air Control valve does not click:
- Switch off ignition.
- Disconnect Idle Air Control valve harness
connector.
- Connect VAG 1527B voltage tester to terminals
1 and 2 of harness connector using jumper wire
from VW 1594
- Switch on ignition.
- Repeat Output DTM for Idle Air Control valve
(N71). LED must flash
If LED flashes:
- Replace Idle Air Control valve.
If LED does NOT flash:
- Switch off ignition.
- Reconnect Idle Air Control valve harness
connector .
- Perform electrical check
step Fig. 26 , if necessary, replace Motronic
Engine Control Module (J220).
Page 4 of 9
01-35
Page 01-50 , test
6/12/2004