Eurovan V6-2800cc 2.8L (AES) (2000)
Idle Speed: Testing and Inspection
Idle speed, checking
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Idle speed, ignition timing and CO content are NOT adjustable.
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Idle speed is controlled by the Throttle Valve Control Module.
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CO content is held within specification by oxygen control. Malfunctions in the oxygen control are monitored by On Board Diagnostic and any
malfunctions are stored in the Diagnostic Trouble Code (DTC) memory.
Special tools and equipment
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VAG 1551/VAG 1552 Scan Tool with VAG 1551/3 adapter cable
Test conditions
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No malfunctions stored in DTC memory
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Battery voltage must be 11.5 V minimum
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Engine oil temperature 80 °C minimum
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All electrical consumers switched off (radiator fan must not run during check)
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Throttle cable adjustment OK
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A/C switched off
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Exhaust system must not have leaks
Test sequence
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Connect VAG 1551 (VAG 1552) Scan Tool. Refer to Scan Tool Testing/VAG 1551 Scan Tool See: Powertrain Management/Computers and
Control Systems/Testing and Inspection
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With engine idling, press buttons -0- and -1- to select "Engine electronics" address word 01.
Display will appear as shown
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -4- to select "Basic setting" function 04.
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Press -Q- button to enter selection.
Display will appear as shown
Read measuring value block
HELP
Input display group number XX
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Press -0- button twice to select "Display group number 1".
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Press -Q- button to enter selection.
Display will appear as shown (1 to 4 = Display fields)
Basic setting 1
->
1
2
3
4
Note: The EVAP Canister Purge Regulator Valve -N80- is closed when function 04 is selected.
Do not continue with check until Engine Coolant Temperature exceeds 80 °C.
See Display field 2.
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Briefly rev engine then let idle for approx. 2 minutes.
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Check specifications
See Display fields 1 to 4.
Adapting idle speed
If droning noises or vibrations occur at idle it is possible to adjust the idling speed slightly. However, the idle speed must never be outside the range of
the specifications.
Special tools and equipment
-
VAG 1551/VAG 1552 Scan Tool with VAG 1551/3 adapter cable