Jetta Sedan V6-2.8L (BDF) (2003)
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-, -0- and -5- for "Display group number 5" and confirm entry with -Q- button.
Indicated on display: (1 to 4 = display zones)
Read measured value block 5
->
1
2
3
4
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Carry out road test with a 2nd person to observe display.
Observe the valid safety precautions when carrying out a road test.
See: Fuel Delivery and Air Induction/Service Precautions/Technician Safety Information
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Observe figure displayed in display zone 3:
Specification: approx. driven speed
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Drive slower. The displayed value must decrease.
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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 no speed is indicated or the display values do not reduce when driving at a lower speed:
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Remove wiper arms and cowl panel:
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Connect VAG 1598/31 test box to control module wiring harness. The Motronic Engine Control Module (ECM) -J220- remains disconnected.
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Connect multimeter to measure voltage between test box sockets 1 (ground) and 54 (vehicle speed signal) using adapter cables from VAG 1594.
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Raise vehicle at front left.
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Switch on ignition.
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Rotate front wheel and observe voltage display.
Specification: 0.0... at least 4.0 V fluctuating
NOTE: Front right wheel must not turn, if necessary, hold to prevent it from turning.
If the display does not fluctuate:
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Check wiring from test box socket 54 to instrument cluster for open/short circuit referring to Electrical Wiring Diagrams: