Eurovan V6-2.8L (AXK) (2001)
Idle Speed: Testing and Inspection
Idle test
NOTE:
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Idle speed (RPM), ignition timing, and CO content cannot be adjusted.
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Idle speed is regulated to the specified value by the throttle valve actuator in connection with the DLS function.
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CO content is adjusted to a specified value by oxygen sensor control. Problems with the oxygen sensor control are recognized by On Board
Diagnostic (OBD) and stored in DTC memory.
Special tools and equipment
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VAG1551 scan tool (or VAG1552 mobile scan tool) with VAG1551/3B cable
Test requirements
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Exhaust system must be properly sealed between catalytic converter and cylinder head.
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All electrical consumers like, for example, lights and rear window heating must be switched off.
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If vehicle is equipped with an A/C system, it must be switched off.
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For vehicles with automatic transmission, selector lever must be in -P- or -N".
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Coolant temperature must be at least 85 °C See display group 04, display field 3
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Intake Air Temperature (IAT) less than 60 °C See Display group 04, display field 4
Test sequence
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Connect VAG1551 scan tool (VAG1552). Start engine and select the Engine Control Module (ECM) using address word 01.
Connecting scan tool and selecting ECM. Refer to " Scan Tool Testing/Scan Tool Connecting and Initial Checks " See: Computers and Control
Systems/Testing and Inspection
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Check DTC memory, repair any malfunctions and then erase DTC memory.
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Then:
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Connect Scan Tool (ST) VAG1551
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Let engine continue to idle
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input.
Indicated on display:
Basic Setting
Enter display group number XXX
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Press buttons -0-, -0- and -1- to select "Display group number 1". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
System in basic setting 1
->
1
2
3
4
NOTE: During the function "System in basic setting", the Evaporative Emission (EVAP) canister purge regulator valve -N80- and the A/C compressor
is switched off.
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Check adjustment requirements for basic setting in display field 4: Specification: 1x111111 Significance of numbers.
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Increase engine speed briefly (depress accelerator quickly) and then let engine run at idle for 2 more minutes.
Checking idle speed (RPM)
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Change to display group 54 as follows:
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Press -C- button.
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Press 0, 5 and 4 for the function "display group number 54", and then press Q to exit from input mode.
Indicated on display: (1 to 4 = display fields)