Passat Wagon L4-2.0L (ABA) (1995)
Vehicle Speed Sensor: Testing and Inspection
Vehicle Speed Signal, Checking
VEHICLE SPEED SIGNAL, CHECKING
Special tools, testers and auxiliary items
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VAG 1551 Scan Tool (ST) or vehicle system tester VAG 1552 with VAG 1551/3 adapter cable
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Multimeter (Fluke 83 or equivalent)
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VW 1594 connector test kit
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Wiring diagram
Test conditions
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Speedometer OK
WARNING! The vehicle speed signal must be checked while driving the vehicle. To do this safely, a second person is required.
Test sequence
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Connect VAG 1551 scan tool (VAG 1552) and insert "Engine Electronics" address word 01. Carry out selection at idle. Refer to "On-Board
Diagnostic". See: 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 -4- to input display group number 004.
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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
2
3
4
NOTES:
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If something different is indicated on display:
See Scan tool operating instructions.
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If an incorrect input causes "Error in communication link" to be displayed, disconnect cable from VAG 1551 scan tool, then reconnect and repeat
work steps.
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Carry out test drive and, with 2nd person, observe display in display field 3.
Specification: approx. vehicle road speed
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06.
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Press -Q- button to confirm input.
If no speed is indicated: