A8 Sedan V8-3.7L (AEW) (1997)
NOTE: When the CTP switch is adjusted, the TP sensor is also adjusted at the same time.
If CTP switch adjustment is OK:
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Check voltage supply for TP sensor.
Checking voltage supply
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Disconnect harness connector from TP sensor.
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Switch ignition on.
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Connect multimeter US 1119 (Fluke 83 or equivalent) and check voltage between connector terminals 1 and 2, and between terminals 2 and 3.
Specified value: 4.5 - 5.5 volts
If both measurements are outside the specified range:
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Check resistance of TP sensor.
If just one measurement is outside the specified range, check wiring to ECM as follows:
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Switch ignition off.
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Connect VAG1598/19 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG1598/19
Test Box, Connecting" See: Computers and Control Systems/Testing and Inspection