S6 V8-4.2L (BBD) (2004)
Vehicle Speed Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Speed signal, checking
Test is valid only for vehicles up to m.y. 2000.
NOTE:
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The vehicle speed signal is generated by the Vehicle Speed Sensor (VSS) -G68- (at transmission) and processed in the instrument cluster.
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The processed signal enters at terminal 54 of the ECM and is used for idle stabilization and tip-in shock reduction during shifting.
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Connect VAS5051 tester or VAG1551 Scan Tool and select control module for engine electronics 1 using "address word" 01. Engine must run at
idle for this.
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. Press -Q- button to confirm input.
Indicated on display
Read measuring value block
Enter display group number XXX
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Press buttons -0-, -0- and -5- to select "Display group number 5". Press -Q- button to confirm input.
Indicated on display
Read measuring value block 5
->
1
2
3
4
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Perform a road test.
WARNING: Secure the Scan Tool (ST) on the rear seat and it have operated from there by a second technician. For this, please observe safety
precautions.
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Check specified value for vehicle speed.
Display Group 5