Jetta V6-2.8L (BDF) (2002)
"Address word" 01. ((VAG 1551 and Motronic Engine Control Module (ECM) -J220-, connecting and selecting).
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Connecting VAG
1551 Scan Tool
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- for function "Read measured value (data) block" and confirm entry with -Q- button.
Indicated on display:
Read measured value block
Input display group number XXX
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Press buttons -0-, -6- and -2- for "Display group number 62" and confirm entry with -Q- button.
Indicated on display: (1 to 4 = display zones)
Read measured value block 62
->
1
2
3
4
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Check throttle valve angle from sensor 1 -G187- at idling stop in display zone 1
Specification: 3 to 93%
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Check throttle valve angle from sensor 2 -G188- at idling stop in display zone 2
Specification: 97 to 3%
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Depress accelerator slowly to full throttle position and observe angles displayed in display zones 1 and 2:
The percentage display in display zone 1 must increase evenly. The full tolerance range 3 to 93% is not always displayed.
The percentage display in display zone 2 must drop evenly. The full tolerance range 97 to 3% is not always displayed.
NOTE:
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The reason why the display in display zone 1 increases and the display in display zone 2 decreases is because the potentiometers (angle sensors) in
the Throttle Valve Control Module -J338- run in opposite directions.
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This means that the voltage of one angle sensor moves towards 5 volts. (The more the throttle valve is opened the higher the voltage; the
percentage figure increases).
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While the voltage of angle sensor 2 decreases from 5 volts towards 0 volts. (The more the throttle valve is opened the lower the voltage; the
percentage figure decreases).
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Press the -> button.
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Press buttons -0- and -6- for function "End output" and confirm entry with the -Q- button.
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Switch off ignition.
If the display does not indicate as described:
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Pull 6-pin connector off Throttle Valve Control Module -J338- -arrow-.
Checking resistance