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Home >> Volkswagen >> 1987 >> Jetta L4-1781cc 1.8L SOHC >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Electronic Control Unit
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Electronic Control Unit



The electronic control unit is designed to constantly adjust the air/fuel mixture based on the signal from the oxygen sensor and coolant temp. sensor. The ECU does this by varying the current to the differential pressure regulator, which alters the control pressure at the fuel distributor.



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