Disconnect plug -1- from Coolant temperature sender -G72--2-.
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Connect handheld multimeter to measure the resistance onto contacts -1- and -2- of the Intake manifold temperature sender -G72--2-.
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:
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Replace the intake manifold temperature sender -G72-.
If the specified value is reached:
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Connect test box -V.A.G 1598/31 - to the wiring loom on the engine control unit → Chapter.
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Check the following wire for interruption or short-circuit to earth or positive: