Passat Sedan V6-2771cc 2.8L DOHC (AHA) (1998)
Vehicle Speed Sensor: Testing and Inspection
Vehicle Speed Signal, Checking
Vehicle speed signal, checking
Special tools and equipment
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VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable
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VAG1598/22 test box
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Multimeter US1119 (Fluke 83 or equivalent)
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VW1594 connector test kit
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Wiring diagrams
Checking conditions
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Battery voltage: min. 11.5 volts
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Speedometer OK.
Checking
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Connect VAG1551 or VAG1552 scan tool and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at
idle), 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, and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press buttons -0-, -0- and -5- to input display group number 5 (005), and press -Q- button to confirm input.
Indicated on display (1-4 = display fields)
Read Measuring Value Block 5
->
1 2 3 4
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Road test and compare indicated vehicle speed with value in display field 3 (2nd technician required).
WARNING!
When driving or riding in an airbag-equipped vehicle, NEVER hold the scan tool or other test equipment in your hands or lap
while in motion. Objects between you and the airbag increase the risk of injury in an accident.
During a test drive in an airbag-equipped vehicle, test equipment must always be fastened to and operated from the rear seat by a
second technician.
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Observe value displayed in display field 3.