S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
Checking wiring
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself.
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Check for open circuit and short to B+ or Ground (GND) in the following wiring connections:
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Repair any open/short circuit as necessary.
If no wiring malfunction is detected:
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Replace accelerator position sensors.
NOTE: After replacing accelerator position sensor, on vehicles with automatic/stepless transmission carry out adaptation of Kick-Down switch.