audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Idle Speed - Fluctuation Troubleshooting|Page 2387 > < Idle Speed - Fluctuation Troubleshooting|Page 2385
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^

start engine and observe U2 voltage

^

must fall within shaded area of graph

If the U2 voltage does NOT fall within the graph

^

the U2 reading is being influenced by another fault condition; possibly a vacuum leak that was overlooked

^

potentiometer/airflow sensor plate assembly is faulty

^

control unit or related wiring is faulty

If U2 adjustment NOT possible
^

replace airflow sensor plate/potentiometer assembly

CAUTION

Part numbers are for reference only. Always check with the parts department for the latest information.

Idle Speed - Fluctuation Troubleshooting|Page 2387 > < Idle Speed - Fluctuation Troubleshooting|Page 2385