Beetle L4-1.9L DSL Turbo (ALH) (1998)
Vehicle Speed Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Vehicle Speed Signal, Checking
The speed signal is required for A/C compressor cut-off when accelerating, for the Cruise Control System and to improve driveablity smoothness (jolt
damping).
Special tools
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VAG 1551/1552 Scan Tool using VAG 1551/3 Adapter cable
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VAG 1598/22 Test Box (MY 1999)
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VAG 1598/31 Test Box (from MY 2000)
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VW 1594 Adapter kit
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VAG 1527B Voltage tester
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Wiring diagram
Checking requirements
-
Speedometer function and speedometer display OK.
WARNING!
Secure Scan Tool to rear seat and operate from this position using a second technician.
Test sequence
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Connect VAG 1551/1552 Scan Tool. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks" See: Computers and Control
Systems/Testing and Inspection
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Start engine and let idle.
-
Press -0- and -1- buttons to select Address word 01: "Engine electronics"
Display will appear as shown (example only)
038906018M 1.9l R4 EDC 00AG 1813
->
Coding 0001
WSC XXXXX
-
Press -> button.
Display will appear as shown
Rapid data transfer
HELP
Select function XX
-
Press -0- and -8- buttons to select Function 08: "Read measuring value block".
-
Press Q button to enter input.
Display will appear as shown
Read measuring value block
HELP
Input Display group number XXX
-
Press -0-, -0- and -6- buttons to select "Display group 6".
-
Press Q button to enter input.
Display will appear as shown (1 to 4 = Display zones)
Read measuring value block 6
->
1
2
3
4
-
Take a test drive using a 2nd technician to observe display.
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Observe value in Display zone 1
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Specification: approx. speedometer display
If no speed indicated