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marcpod
marcpod, Own collision repair advice
Category: VW
Satisfied Customers: 2881
Experience:  i-car/Basf training, 300 repairs and 650,000 in Collision monthly 18 yrs exp/licensed adjuster
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does the code p501 means i have to change the speed sensor

Resolved Question:

does the code p501 means i have to change the speed sensor\
Submitted: 7 years ago.
Category: VW
Expert:  marcpod replied 7 years ago.

Welcome to just answer. it is specific to the speed sensor yes, And there is a procedure that needs to be done specific to that code and a scan tool must also be used. Here is the procedure.

Checking Speed Signal

Recommended special tools and equipment

  • VAG1526 multimeter or VAG1715 multimeter
  • VAG1594 connector test kit
  • Wiring diagram

Test requirements

  • The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK.
  • Battery voltage must be at least 11.5 volts .
  • Speedometer -G21- must be OK.

Test sequence

NOTE: To test speed signal, vehicle must be driven. Doing this requires a second person.

CAUTION: Secure Scan Tool (ST) on the rear seat and have operated from there by second technician.

  • End diagnosis and switch ignition off.

If no speed is indicated:

Vehicles with engine code AEG

  • To measure voltage, connect multimeter between sockets 2 (Ground -GND-) + 20 (speed signal) of test box.

Vehicles with engine code AVH, AZG

  • To measure voltage, connect multimeter between sockets 2 (Ground -GND-) + 54 (speed signal) of test box.

Continuation for all vehicles

  • Jack up front left wheel.
  • Switch ignition on.
  • Rotate front wheel, and observe voltage indicated while doing so. Specified value: 0.0 to at least 4.0 V , fluctuating

NOTE: The right front wheel must not turn during this, hold it steady if necessary.

If indicated voltage does not oscillate:

 

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