Volkswagen Passat 1995 Official Factory Repair Manual page 1535

Diagnostic mode, selecting
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Diagnostic mode 5: Check output of
oxygen sensor signals
Note:
This diagnostic mode can only be selected
with Module number 10 - Engine Electronics.
Function
The static values of the oxygen sensors are
indicated via this diagnostic mode.
The values of the individual oxygen sensor
test results must reach the specified value or
must be within the min.- and max.- limits.
Requirements
Exhaust system must be properly sealed
between catalytic converter and cylinder
head.
There must not be any DTCs stored in
DTC memory Page ST-22
mode 3: Check DTC memory.
Coolant temperature must be at least
80 C Page ST-15
1: Check measured values; PID 05,
Coolant temperature.
Page 15 of 35
ST-28
, Diagnostic
, Diagnostic mode
6/12/2004