The most important components of the injection system Electronic control unit The control unit in the electronic box receives information via a multi-pin connector: starter, terminal 50 start and end of the start...
This is how the Motronic injection system works Starting a cold engine: In addition to the intake air, the throttle control module draws in additional air. At the same time, the control unit receives...
Malfunctions and self-diagnosis of Motronic The electronic control unit for the Motronic injection system can recognize and memorize defects that occur during engine operation. Recognized defects are...
Self-help injection In the injection system, unfortunately, little can be done on one's own, since deep checks require a good knowledge of the material and, above all, measuring...
Visual control of the Motronic injection system Are leaks visible on fuel lines? Have you disconnected and then reconnected wire connectors several times? Corrosion or unprofessional handling may damage the...
Troubleshooting in individual nodes Pressure regulator An appropriate pressure gauge is required to measure pressure (V.A.G 1318) with stopcock and adapter. Nominal value at idle approx. 3.5 bar;...
Checking idling and exhaust gases Installation work is not carried out with the Motronic ignition / injection system, since this system «self-learning». This means that the control unit...
Exhaust gas test (AU) In the FRG, vehicles with adjusted catalytic converters require a first exhaust gas check three years after the date of first approval and every two years...
Motronic throttle cable Cabin throttle cable (1) with your nipple (3), under which the spring is placed, is suspended in the forked eye at the upper end of the gas pedal (2) as shown...
Help with Motronic malfunctions Malfunction Her reasons Your help A. Cold engine does not start or starts poorly 1. Defective fuse 15, 28, 29, 32 or 34 2. Defective power supply relay 3. The...