Volkswagen Passat 1995 Official Factory Repair Manual page 1285

Components of engine, checking
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Parking brake must be engaged or else
daylight driving lights will be switched on.
For vehicles with automatic transmission,
selector lever must be in -P-.
If vehicle is equipped with an A/C system, it
must be switched off.
Ground (GND) connections between engine,
transmission and chassis must be OK.
Coolant temperature must be at least 80 C
Page ST-15 , Diagnostic mode 1: Check
measured values; PID 5, Coolant
temperature.
Function test
- Connect diagnostic tester
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic
mode 1: Checking measured values."
- Select the measuring value "PID 16: Air flow
quantity at Mass Air Flow (MAF) sensor".
Page 8 of 62
24-32
Page ST-8 .
6/12/2004