TT L4-1.8L Turbo (BEA) (2004)
Vehicle Speed Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Vehicle Speed Sensor (VSS) Signal, Checking
Special tools and equipment
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VAG1526A
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VAG1527B
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VAG1594A
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VAG1598/31
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VAS5051 with VAG5051/1
NOTE:
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The vehicle speed signal is generated by the Speedometer Vehicle Speed Sensor (VSS) -G22- (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.
Test requirement:
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Function and display of speedometer OK. Troubleshooting:
Test sequence
WARNING: To reduce the danger of accident during road tests, always observe safety precautions. See: Fuel Delivery and Air Induction/Service
Precautions/Technician Safety Information
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Connect VAS5051 scan tool and select control module for engine electronics using "address word" 01. Engine must run at idle for this. See:
Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Connecting VAS
5051/VAG 1551 Scan Tool (ST)
Display on VAS 5051: