Volkswagen Golf 2004 Service Manual page 181

It is automatically switched to display for measuring rev limit.
Measurement starts when the engine speed has reached the re‐
quired level.
– Operate throttle until the measurement is carried out. To do
this, immediately depress accelerator pedal.
The remaining time to perform measurement is displayed
-arrow-.
Note
♦ Do not insert emission probe into exhaust tail pipe.
Measurement can be skipped using
♦
emissions test has failed.
Air quality check:
An air quality check is carried out before starting the free accel‐
eration. When doing this, no emission probe must be in the
exhaust tail pipe. Otherwise measuring errors or faulty signals
could occur during further measurements.
– When the air quality check is carried out, insert emission probe
into exhaust tail pipe
Free acceleration:
It is automatically switched to display for "Free acceleration".
During "Free acceleration" the engine is revved up to rev limit
without load as quickly as possible.
The "Free acceleration" test consists of at least four throttle
bursts.
Free acceleration - phase 1:
– Follow instructions on display -arrow A- and -arrow C-.
– Maintain idling speed in engine speed range indicated
-arrow D-.
The remaining time to perform measurement is displayed
-arrow B-.
Note
The emissions probe must be in the exhaust tail pipe.
♦
If the speed deviates from engine speed range indicated, the
♦
measurement starts again.
Measurement can be skipped using
♦
emissions test has failed.
Free acceleration - phase 2:
button, i.e. the exhaust
→
button, i.e. the exhaust
→
Golf 2004 ➤ , Golf Plus 2005 ➤
Maintenance - Edition 11.2009
5. Exhaust emissions test
177