audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Removing and installing air mass meter > < Removing and installing glow plugs

A4 Mk1

Checking glow period warning lampK29
Checking glow period warning lamp -K29-
Test condition:
t  Glow period warning lamp -K29- in dash panel insert OK → Electrical system; Rep. Gr.90
Test sequence
–  Start final control diagnosis and activate glow period warning lamp -K29-.
The glow period warning lamp -K29- should flash.
If the glow period warning lamp -K29- does not flash:
–  Connect test adapter -V.A.G 1598/30- to wiring harness for engine control unit → Chapter.
   
–  Using a test lead from auxiliary measuring set -V.A.G 1594C-, connect together sockets 1/04 and 4/30 on the test adapter -V.A.G 1598/30-.
–  Switch on ignition.
t  Specification: the glow period warning lamp -K29- should light up.
If the glow period warning lamp -K29- does not light up:
–  Check for open circuit and short to positive or earth in the following wiring connections → Current flow diagrams, Electrical fault finding and Fitting locations.
–  Rectify open circuit or short circuit in wiring as necessary.
If the warning lamp lights up now but did not light up during the final control diagnosis:
–  Renew diesel direct injection system control unit -J248- → Chapter.
  A23-0103

Removing and installing air mass meter > < Removing and installing glow plugs