Volkswagen Passat 1995 Official Factory Repair Manual page 1643

Output Diagnostic Test Mode (DTM), initiating
Output Diagnostic Test Mode
EVAP canister purge regulator valve N80
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Activate EVAP canister purge regulator
valve (N80):
- Press
button.
Display will appear as shown:
The activated EVAP canister purge
regulator valve 1 (on Air Cleaner
housing) must click until the next
DTM component is selected by
pressing the button.
- Pull hose off EVAP canister purge
regulator valve (from EVAP canister).
- Connect auxiliary hose.
- During Output DTM, blow into
auxiliary hose (in direction of Throttle
Body). Valve must open and close
If the EVAP canister purge regulator
valve does not click:
- Disconnect 2 pin harness connector
from EVAP canister purge regulator
valve and connect VAG 1527B
voltage tester to the harness
connector using jumper wires from
VW 1594 adaptor kit . The LED must
flash
If the LED flashes:
- replace EVAP canister purge
regulator valve.
If the LED does NOT flash:
- Switch off ignition.
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6/12/2004