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Testing Intake manifold pressure sender G71 and Altitude sender F96 > < Testing Intake manifold temperature sender G72

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Testing Engine speed senderG28
Testing Engine speed sender -G28-
The Engine speed sender - G28- is a speed and reference marking sender. The engine stops if there is no signal received.
Special tools and workshop equipment required
t  Hand multimeter (e.g. -V.A.G 1526 A-)
t  Adapter cable set (e.g. -V.A.G 1594 C-)
t  Test box -V.A.G 1598/31-
Test sequence
–  Switch off ignition.
–  Remove engine cover.
–  Disconnect plug connection -1- of the engine speed sender -G28--2-.
   
–  Connect handheld multimeter onto contacts 1+2 of plug -2- to measure the resistance.
   Specified value: 450…550 Ω
If the specified value is not reached:
–  Replace engine speed sender -G28-.
If the specified value is reached:
–  Connect test box -V.A.G 1598/31 - to the wiring loom on the engine control unit .
  S23-0117
–  Check the following wiring for interruption or short-circuit to earth or positive:
  S23-0117
Connector -1-, contactTest box -V.A.G 1598/31-, bush 
1110 
2102
3101

–  Also check the wires for short-circuits.
If the lines are not found to be faulty:
–  Replacing engine control unit -J248- → Chapter.
   

Testing Intake manifold pressure sender G71 and Altitude sender F96 > < Testing Intake manifold temperature sender G72