S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
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Connect VAG 1598/5 adapter cable to ECM.
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Switch ignition ON.
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Connect DVOM between terminals 12 and 30.
^
Must be 4.5-5.5 volts.
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Connect DVOM between terminals 30 and 53.
^
Must be 4.5-5.5 volts.
If NO (one or both specified values NOT obtained):
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Replace ECM.
Checking TP sensor resistance
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Using VW 1594 connector test kit, connect DVOM to following terminals, in turn:
Terminals 1 and 2:
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Must be 1500-2600 ohms.
Terminals 2 and 3:
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Must be 750-1300 ohms.
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Measure resistance again while bringing throttle lever slowly to Wide Open Throttle (WOT) position.
^
Must increase to 3600 ohms maximum.
If NO (for one or both circuits):
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Replace TP sensor.
Adjusting
Note: Adjusting the Closed Throttle Position (CTP) switch automatically adjusts the TP sensor.
