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Testing the speed signal > < Test conditions

Octavia Mk1

Test sequence
Test sequence
–  Switch off ignition.
–  Unscrew windscreen wiper arms and remove the cooling water tank cover → Body Work; Rep. Gr.66.
–  Unlock connector at engine control unit -J248 - and unplug.
–  Connect test box -V.A.G 1598/31- to the engine control unit -J248-. The wiring loom of the control unit is not connected → Chapter.
–  Test the central terminating resistor in the engine control unit -J248-.
–  Measure resistance between test box sockets 6 + 7.
   Specified value: 60…72 Ω
If the resistance is not within the specified range:
–  Replacing engine control unit -J248- → Chapter.
If the resistance is within the nominal value range:
–  Rectify fault in the CAN databus lines, or in the CAN databus lines of other control units → Electrical System; Rep. Gr.90.
   

Testing the speed signal > < Test conditions