Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Vehicle Speed Sensor: Testing and Inspection
Speed Signal, Checking
Speed signal, checking
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 Connector test set
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Wiring diagram
Test requirements
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The respective fuses of Motronic Engine Control Module (ECM) - J220- must be OK:
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Battery voltage must be at least 11.5 volts.
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Speedometer -G21- must be OK.
Test sequence
NOTE: To test speed signal, vehicle must be driven. Doing this requires a second person.
WARNING: Secure Scan Tool (ST) on the rear seat and have operated from there by second technician.
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Connect diagnostic tester. See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan
Tool Connecting/With Generic Scan Tool/Diagnostic Tester, Connecting
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Start engine and let run at idle.
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Under address word 33, select "Diagnostic mode 1: Checking measuring values."
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Select the measuring value "PID 13: Vehicle speed".
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Perform a road test, and have the 2nd person observe the indication on the display.
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Check specified value of the vehicle speed:
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End diagnosis and switch ignition off.
If no speed is indicated:
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
Vehicles with engine code AHA
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Connect multimeter between sockets 2 + 20 (speed signal) of test box for voltage measurement.
Vehicles with engine code ATQ
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To measure voltage, connect multimeter between sockets 3 (terminal 15) + 54 (speed signal) of test box.
Continuation for all vehicles
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Jack up front left wheel.
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Switch ignition on.