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Checking engine speed sender G28 > < Checking components and functions

Checking diesel direct injection system voltage supply

Checking voltage supply for diesel direct injection system
Checking voltage supply for diesel direct injection system
Special tools and workshop equipment required
t  Adapter -V.A.G 1598/22-
t  Hand multimeter -V.A.G 1526C- or multimeter -V.A.G 1715-
t  Adapter set -V.A.G 1594C-
t  Current flow diagram
Test prerequisites:
l  Battery voltage OK.
Test procedure
–  Switch off ignition.
   
–  Connect adapter -V.A.G 1598/22- to control unit wiring harness.
–  Bridge sockets 33+1 with auxiliary leads from measuring aid set -V.A.G 1594C-.
–  Measure voltage between following sockets: 2+1, 28+1, 27+2 and 28+27.
Specification: approx. battery voltage
If the specification is not reached:
–  Check terminal 30 voltage supply relay -J317-.
–  Check cable connections for open circuit, short circuit and transfer resistance at contacts according to current flow diagram.
If no fault is found in wiring and relay:
–  Renew diesel direct injection system control unit -J248- → Chapter
  N24-0709

Checking engine speed sender G28 > < Checking components and functions