Testing control unit input values
Checking -G149 sensor for modulating piston movement and -N146 metering control
The quantity adjuster is an electromagnetic swivelling positioner that is controlled by the control unit by a specific duty cycle. The eccentric shaft on the quantity adjuster moves the modulating piston on the high pressure piston and thereby regulates the quantity of fuel injected.
The modulating piston movement sender informs the control unit of the modulating piston position, thereby indicating the quantity of fuel injected.
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‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select the engine electronics control unit using "Address word" 01. For this purpose, the engine must be running at idling speed.
(Connecting fault reader and selecting engine electronics control unit .)
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