Volkswagen Golf 2004 Service Manual page 180

Golf 2004 ➤ , Golf Plus 2005 ➤
Maintenance - Edition 11.2009
– If lamp lights up, press button "Lamp On" -arrow C-.
Note
If the MI lamp does not light up during visual check, the result of
the exhaust emissions test is "Failed".
Visual check of MI lamp with engine running:
– Start engine and confirm engine running on display with "Yes".
– Perform visual check of "MI lamp". The lamp must not light or
flash.
– Confirm condition of "MI lamp" -arrow-.
It is automatically switched to test for readiness of operation.
It is checked here if all tests for readiness of operation supported
by the control unit have been performed.
Conditioning:
In the conditioning phase the engine and, if necessary, the emis‐
sion control systems are brought to operating temperature by
throttle bursts and are prepared for the exhaust emissions test.
– Follow instructions on display.
– Maintain engine speed in required engine speed range.
If no conditioning is necessary, press
measurement.
Reading engine temperature:
The engine temperature is read via the diagnostic connector of
engine control unit.
When the required engine temperature is reached, it is automat‐
ically switched to display for measuring the idling speed.
Measuring idling speed:
– Follow instructions on display.
Measurement starts when the engine speed has reached the re‐
quired level.
Note
Do not insert emission probe into exhaust tail pipe.
♦
Measurement can be skipped using
♦
emissions test has failed.
Measured values are reset using
♦
repeated.
– Maintain engine speed in required engine speed range.
The remaining time to perform measurement is displayed
-arrow-.
Measuring rev limit:
176
5. Exhaust emissions test
button -arrow- for the next
→
button, i.e. the exhaust
→
button and the test can be
←