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Checking coolant temperature sender > < Checking engine speed sender

Leon Mk2

Test sequence
Test sequence
   
–  Separate black 3-pin connector to engine speed sender -arrow-.
  E23-0009
–  Measure resistance between connector contacts 1+2. Specification: 1.0 ... 1.5 kΩ
If the specification is not obtained:
–  Renew engine speed sender -G28-: → Chapter
If specification attained:
–  Remove wiper arms and cowl panel: → Electrical system; Rep. Gr.92
  N23-0019
–  Connect test box -V.A.G 1598/22- to control unit wiring harness.
  N24-0709
–  Check wiring for open circuit between test box and 3-pin connectoraccording to current flow diagram. Contact 1+ socket 69 Contact 2+ socket 67 Contact 3+ socket 71 Wire resistance: max. 1.5 Ω
–  Check wiring at 3-pin connector for short circuit to one another according to current flow diagram. Specification: ∞ Ω
If no wiring fault is detected:
–  Renew engine control unit → Chapter.
  V28-1074

Checking coolant temperature sender > < Checking engine speed sender