A4 Mk1
Testing electronic engine power control (electronic throttle)
Testing accelerator position senders
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→ Indicated on display: |
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→ Indicated on display: |
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→ Indicated on display: |
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Note: The engine control unit converts the voltage readings from the angle senders into percentages of 5 V and displays them as percentages. (A supply voltage of 5 V is equivalent to 100%.)
The percentage value in display zone 3 should rise steadily between 12 and 97 % but without covering the full range of values. The percentage value in display zone 4 should also rise steadily but without covering the full range of values (in this case 4...49 %). Note: The value shown in display zone 3 should always be about twice as high as the value shown in display zone 4. If the display values do not appear as described:
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Testing wiring
If no fault is detected in the wiring:
=> Fuel supply system, Petrol engines; Repair group 20; Servicing accelerator mechanism |