Skoda OCTAVIA MK1 Service Manual page 245

Specified value: 25 to 35 Ω.
If the specified value is not reached,
replace the variable intake manifold
changeover valve.
Test voltage supply and actuation of the
variable intake manifold changeover valve
-N156-
Disconnect plug at variable intake
–
manifold changeover valve.
Connect the voltage tester to contact 1
– (positive) of the plug and to the engine
mass.
Switch on the starter motor for a short
– time. While doing so, the engine can also
start. Specified value: The voltage tester
must light up.
The diode does not light up:
Check the cable of contact 1 of the plug
at the variable intake manifold
– changeover valve to fuse for continuity
according to the current flow diagram
→ Current flow diagrams and Fitting
locations.
If the fuse and the wiring are o.k, check
– the actuation of the fuel pump relay
→ Chapter.
Connect voltage tester to contact 1
– (positive) and 2 (actuation of engine
control unit) of the plug at the variable
intake manifold changeover valve.
– If the voltage tester does not flash or if it
remains lit. Connect the test box
245