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Checking servotronic solenoid valve > < Checking voltage supply for servotronic

A4 Mk2

Checking speed signal
Checking speed signal
The speed signal is taken from the control unit in dash panel insert -J285-.
–  Remove driver's storage compartment → General body repairs, interior; Rep. Gr.68.
   
–  Pull out servotronic control unit -J236-, position 2.
–  If voltage supply, servotronic solenoid valve and road speed display on speedometer are all OK, check electrical wiring between servotronic control unit -J236-, contact 4, and control unit in dash panel insert -J285- → Current flow diagrams, Electrical fault finding and Fitting locations.
–  If electrical wiring between contact 4 and control unit in dash panel insert -J285- is OK, renew servotronic control unit -J236-.
  A97-0399

Checking servotronic solenoid valve > < Checking voltage supply for servotronic