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Testing the speed signal > < Test conditions

Octavia Mk1

Test sequence
Test sequence
–  Switch off ignition.
–  Remove the cooling water tank cover → Body Work; Rep. Gr.66.
–  Unlock connectors of diesel direct injection system control unit -J248- and unplug.
–  Connect test box -V.A.G 1598/31 - to diesel direct injection system control unit - J248 -. Wiring loom to control unit is not connected for this step → Chap. 23-3.
–  Test the central terminating resistor in the diesel direct injection system 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:
–  Replace diesel direct injection system control unit - J248- → Chapter 23-5.
If the resistance is within the specified 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