volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Spark plugs - check > < Checking sequence

Polo Mk4

Pre-heating system - check
Pre-heating system - check
Special tools and workshop equipment required
t  Portable multimeter -V.A.G 1526/A-
t  Measuring appliance set -V.A.G 1594/C-
Checking conditions
l  Razor fuse 176 for spark plugs on battery/fuse support in order.
l  Battery tension must be, at least, 11.5 V.
l  All power consuming components, such as lights and rear window heating must be off
l  Command unit for diesel direct injection -J248- in order.
Checking sequence
   
–  Remove sensor bipolar-connector -1- for cooling fluid temperature -G62--2-.
  Note
The disconnection of sensor from plug simulates the situation “very cool engine” and up on turning on ignition a pre-heating corresponding process is performed.
–  Turn off spark plugs connector.
–  Connect multimeter to measure tension between spark plug jack and vehicle ground.
–  Turn on ignition and keep it on for about 20 seconds must indicate an approximated battery tension value.
–  If there is no tension:
–  Consult fault memory, correct any existing faults and fault memory afterwards → Chapter, check engine command unit fault memory and erase it.
  S23-0103

Spark plugs - check > < Checking sequence