Volkswagen Golf 1999 Service Manual page 907

Motronic Engine Control Module (ECM) -J220-
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Test requirements
The fuses must be OK.
The main fuses must be OK.
The battery voltage must be at
least 11.5 V.
All electrical accessories, e.g.
lights and rear window defroster
must be switched off.
If the vehicle is equipped with air
conditioning, it must be turned
off.
Selector lever must be in
position "P" or "N" on vehicles
with an automatic transmission.
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