Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
Vehicle Speed Sensor: Testing and Inspection
Additional signals, checking
Vehicle Speed Signal, checking
Special tools, testers, measuring instruments and auxiliary items required
-
Scan Tool VAG 1551 with cable VAG 1551/3B
-
VAG 1598/22 Test Box
-
Fluke 83 Multimeter
-
VW 1594 Adaptor kit
-
Wiring diagram
Checking conditions
-
Battery Voltage must be 11.5 Volts minimum
-
Speedometer must be OK
Test sequence
NOTE: To check the Vehicle speed signal, the vehicle must be driven, thus requiring a second technician.
WARNING!
Secure scan tool to rear seat and operate from this position.
-
Connect VAG 1551/1552 Scan Tool, Refer to "Scan Tool Testing", See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
-
Start engine and let idle
-
Press 0 and 1 buttons to select "Address word" 01 "Engine electronics"
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 5 buttons to select "Display group 5"
-
Press Q button to enter input
Display will appear as shown (1 to 4 Display zones)
Read measuring value block 5
->
-
Perform test drive with a 2nd technician to observe display.
-
Observe figure shown in display zone 3
-
Specification: approx. driven speed