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‒ Check display values for electronic throttle potentiometer voltages.
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Display zones
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1
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2
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3
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4
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Display Group 062: Electronic throttle potentiometer voltages
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Display
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xx %
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xx %
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xx %
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xx %
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Indicates
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Throttle valve angle (angle sender 1)
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Throttle valve angle (angle sender 2)
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Accelerator position sender
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Accelerator position sender 2
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Range
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0 ... 100 %
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0 ... 100 %
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0 ... 100 %
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0 ... 100 %
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Specification
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3...93 %
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97...3 %
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12...97 %
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4...49 %
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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%.)
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‒ Observe display zones 3 and 4.
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‒ Slowly depress accelerator to full throttle position.
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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‒ Test voltage supply and wiring to accelerator position senders
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‒ Adjust accelerator position senders (right-hand drive vehicles only).
=> Fuel supply system, Petrol engines; Repair group 20; Servicing accelerator linkage - Vehicles with electronic throttle; Right-hand drive vehicles
Testing voltage supply to accelerator position senders
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‒ Remove storage compartment on driver's side.
=> General body repairs, Interior; Repair group 68; Storage compartments, covers and trim parts; Removing and installing driver's storage compartment
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‒ Unplug connector for accelerator position sender.
Left-hand drive vehicles
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