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Engine cooling > < Heating rheostat (crankshaft sump breather) N79 : checking

Leon Mk2

Oil pressure and oil pressure switchF1: checking
   
Oil pressure and oil pressure switch -F1-: checking
Special tools and workshop equipment required
t  Oil pressure tester -VAG 1342-
t  Voltage tester -VAG 1527B-
t  Measuring tool set -VAG 1594C-

  Note
Checking operation of and servicing visual and acoustic oil pressure gauge → Current flow diagrams, Electrical fault finding and Fitting locations
Test sequence
   
–  Remove oil pressure switch -F 1- and screw into oil pressure tester -VAG 1342-.
–  Screw oil pressure tester -VAG 1342- into the cylinder head in place of the oil pressure switch -F 1-.
–  Connect brown wire 1 of tester to earth (-).
–  Connect voltage tester -VAG 1527B- with auxiliary cables from the measuring tool set -VAG 1594C- to positive of battery (+) and to oil pressure switch. The LED must not light.
–  If the LED lights up, replace oil pressure switch -F1-.
If the LED does not light up:
–  Start engine and slowly increase engine speed. the LED should light up between 0.3 ...0.7 bar; if not replace oil pressure switch.
–  Increase engine speed further. Bring up to 2000 rpm and raise the oil temperature to 80 °C, the oil pressure should be 2.0 bar at least.
At higher engine speeds the oil pressure must not exceed 7.0 bar. If necessary, replace the oil pump with the relief valve.
  V17-0540

Engine cooling > < Heating rheostat (crankshaft sump breather) N79 : checking