TT Coupe L4-1.8L Turbo (AWP) (2005)
If the display values do not appear as described:
Testing switch
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Unplug connector from pressure switch/power steering -F88 on power steering pump.
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Connect multimeter to switch (resistance measurement range).
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Start the engine.
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Specification: Infinity Ohms (no continuity)
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Turn steering wheel to full lock (left and right).
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Specification: approx. 0 Ohm
If the display does not change:
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Replace pressure switch/power steering -F88-.
If the display changes:
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Test the wiring.
Testing wiring
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Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself.
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Test for open circuit and short to positive or Ground in the following wiring connections: