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Testing Engine speed sender G28 > < Check sender for coolant temperature G62

Fabia Mk1

Testing Intake manifold temperature senderG72
Testing Intake manifold temperature sender -G72-
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552 -
t  Diagnostic cable -V.A.G 1551/3, 3A, 3B oder 3C-
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
–  Connect vehicle system tester -V.A.G 1552-. Start engine and select address word 01 “Engine electronics”.
–  Select function 08 “Read measured value block” and display group number 007.
   
–  Observe intake manifold temperature in display field 3.
   Specified value: approx. ambient temperature
In the event of a fault a replacement temperature of 136.8 °C is displayed.
If an implausible value is displayed in display field 3 or if a replacement temperature of 135.9°C is displayed instead:
–  Select function 06 “End output” and confirm with Q.
–  Switch off ignition.
–  Removing right headlights → Electrical System; Rep. Gr. 94.
  
Reading measured value block         7   ->
15.4 °C     0 %      15.9 °C     16.7 °C
–  Disconnect plug -1- from Coolant temperature sender -G72--2-.
–  Connect handheld multimeter to measure the resistance onto contacts -1- and -2- of the Intake manifold temperature sender -G72--2-.
  S23-0118
Specified value:
The specification in field -A- applies to the temperature range 0 to 50 °C, the specification in field -B- applies to the temperature range 50 to 100°C.
Read out examples:
t  The specification for a temperature of 30 °C is 1500 to 2000 Ω
t  The specification for a temperature of 80°C is 275 to 375 Ω
If the specified value is not reached:
–  Replace the intake manifold temperature sender -G72-.
If the specified value is reached:
–  Connect test box -V.A.G 1598/31 - to the wiring loom on the engine control unit .
  N24-0157
–  Check the following wiring for interruption or short-circuit to earth or positive:
  S23-0118
Connector -1-, contactTest box -V.A.G 1598/31-, bush 
152 
273

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

Testing Engine speed sender G28 > < Check sender for coolant temperature G62