Passat Wagon L4-2.0L (ABA) (1995)
Idle Speed: Testing and Inspection
Idle Air Control, Checking
IDLE AIR CONTROL, CHECKING
Functional check
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Functional check See Output Diagnostic Test Mode (DTM), refer to "On-Board Diagnostic". See: Powertrain Management/Computers and
Control Systems/Testing and Inspection
Special tools, testers and auxiliary items
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VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable
Test sequence
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Start engine and run at idle speed.
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Connect VAG 1551 scan tool and select "Rapid data transfer"operating mode.
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Press buttons -0- and -1- to insert "Engine Electronics" address word 01. Carry out selection at idle, refer to "On-Board Diagnostic". See:
Powertrain Management/Computers and Control Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.
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Press -Q- button to confirm input.
Indicated on display
Read measuring value block
HELP
Input display group number XXX
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Press -0-, -0- and -1- to input display group number 001.
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Press -Q- button to confirm input.
Indicated on display (1, 2, 3 and 4 = Display fields)
Read measuring value block 1
->
1
2
3
4
NOTE: If something different is indicated on the display:
See VAG 1551 scan tool operating instructions.
CAUTION!
Do not continue with the check until engine coolant temperature exceeds 80 °C (display field 2).
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Briefly increase engine speed (RPM) by pressing on accelerator pedal, then allow engine to run at idle speed for 2 minutes.
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Press -C- button.
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Press -0-, -0- and -5- to input display group number 005.
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Press -Q- button to confirm input.
Indicated on display (1, 2, 3 and 4 = Display fields)
Read measuring value block 5
->
1
2
3
4
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Read and record duty cycle in display field 3.