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Test air mass meter G70 > < Testing exhaust gas recirculation

Octavia Mk1

Testing exhaust gas recirculation valve N18
Testing exhaust gas recirculation valve -N18-
Special tools and workshop equipment required
t  Handheld multimeter (e.g. -V.A.G 1526 A-)
t  Measuring tool set (e.g. -V.A.G 1594-)
t  Test box -V.A.G 1598/22- or -V.A.G 1598/31-
Test conditions
l  Fuses No. 29 and 34 o.k.
Test sequence
–  Connecting up the vehicle system tester and selecting → Chapter the control unit for engine electronics.
–  Select final control diagnosis and activate exhaust gas recirculation valve -N18- → Chapter.
If the injector is not actuated (does not click):
   
–  Unplug connector -1- for the exhaust gas recirculation valve -N18-.
–  Connect multimeter for resistance measurement at valve -2-.
Specified value: 14...20 Ω
If the specified value is not reached:
–  Replace exhaust gas recirculation valve.
If the specified value is reached:
–  Connect the multimeter for voltage measurement to contact 1 of the connector -1- and to earth.
–  Switch on ignition.
Specified value: battery voltage
If the specified value is not reached:
–  Connect test box -V.A.G 1598/22- or -V.A.G 1598/31- at wiring loom to engine control unit → Chapter.
  S23-0148
–  Test the cable connections for short circuit to positive or negative and for interruption according to the current flow diagram (plug -1-) → Current flow diagrams and Fitting locations.
–  If necessary eliminate wire interruption or short-circuit.
If the lines are not found to be faulty:
–  Replacing engine control unit -J248- → Chapter.
  S23-0148

Test air mass meter G70 > < Testing exhaust gas recirculation