A8 Sedan V8-3.7L (AEW) (1997)
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Disconnect harness connector from Throttle Position (TP) sensor.
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Check wiring for continuity or short circuit:
TP sensor connector
VAG1598/19 test box socket (ECM terminal)
terminal
4(Ground)
D11 (Ground)
6
B4
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Repair wiring to correct open or short circuit as necessary.
NOTE: When repairing terminals in TP sensor connector, be sure to use only gold-plated terminals.
If wiring is OK:
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Check CTP switch.
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Reconnect TP sensor harness connector.
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Connect multimeter US 1119 (Fluke 83 or equivalent) and check for continuity between terminals D11 and B4.
Specified value: continuity when throttle valve is closed
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Open throttle valve
Specified value: no continuity
If results are not as specified:
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Replace Throttle Position (TP) sensor.
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Check readiness code. If DTC memory has been erased, generate new readiness code.