volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Checking speedometer sender G22 > < Checking exhaust gas recirculation valve N18

Polo Mk3

Checking exhaust gas recirculation valveN18 voltage supply
Checking exhaust gas recirculation valve -N18- voltage supply
–  Pull connector from valve → Chapter.
   
–  Connect hand-held multimeter -V.A.G 1526C- to connector contact 1 and engine ground using auxiliary lines from auxiliary measuring set -V.A.G 1594C-.
–  Switch on ignition.
–  Specification: approx. battery voltage
If the specification is not achieved:
–  Switch off ignition.
Engine code AGD (with 68-pin control unit)
  V96-0749
–  Connect adapter cable, 68-pin -V.A.G 1598/18A- to control unit wiring harness.
  V29-0062
–  Check lines between adapter cable (68-pin) -V.A.G 1598/18A- and connector for open circuit according to current flow diagram. Contact 1 + socket 68 Contact 2 + socket 25.
Cable resistance: max. 1.5 Ω.
Engine codes AGD (with 80-pin control unit), AHG, AKU
  V96-0749
–  Connect adapter -V.A.G 1598/22- to control unit wiring harness.
  N23-0197
–  Check lines between adapter -V.A.G 1598/22- and connector for open circuit according to current flow diagram. Contact 1+sockets 2+28 Contact 2+socket 29.
Cable resistance: max. 1.5 Ω.
Continuation for all engine codes
–  Also check wiring for short to one another, short to vehicle earth and short to battery positive.
Specification: ∞ Ω.
If no fault in lines is detected:
–  Renew diesel direct injection system control unit -J248- → Chapter.
  V96-0749

Checking speedometer sender G22 > < Checking exhaust gas recirculation valve N18