Volkswagen Passat 1995 Official Factory Repair Manual page 1346

Function tests
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Ground (GND) connections between engine
and chassis must be OK.
All electrical consumers such as lights and
rear window defroster must be switched off.
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.
Exhaust system must be properly sealed
between catalytic converter and cylinder
head.
Coolant temperature must be at least 80 C
Page ST-15 , Diagnostic mode 1: Check
measured values; PID 5, Coolant
temperature.
Oxygen sensor heater for oxygen sensor
behind catalytic converter must be OK,
check Page 24-28
Test sequence
- Select the lambda test results and check
whether the specified values are being reached
Page ST-28 , Diagnostic mode 5: Check
output of oxygen sensor signals.
Page 7 of 13
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6/12/2004
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