Vehicle Motronic Injection System Audi A4 B5, petrol
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...
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...
This is how the Motronic injection system works
Starting a cold engine: in addition to the intake air, the throttle control unit lets in an additional amount of air. At the same time, the control unit...
Starting a cold engine: in addition to the intake air, the throttle control unit lets in an additional amount of air. At the same time, the control unit...
Motronic malfunctions and self-diagnosis
The electronic control unit of the Motronic injection system can recognize and store faults that occur during engine operation. The detected faults are stored...
The electronic control unit of the Motronic injection system can recognize and store faults that occur during engine operation. The detected faults are stored...
Self-help with injection
Unfortunately, there is little you can do on your own in the injection system, since in-depth checks require good knowledge of the material and, above all,...
Unfortunately, there is little you can do on your own in the injection system, since in-depth checks require good knowledge of the material and, above all,...
Visual inspection of the Motronic injection system
Are there any noticeable leaks in the fuel lines? Have you disconnected and then reconnected the wire connectors several times? Corrosion or unprofessional...
Are there any noticeable leaks in the fuel lines? Have you disconnected and then reconnected the wire connectors several times? Corrosion or unprofessional...
Troubleshooting individual components
Pressure regulator To measure pressure, a suitable pressure gauge is required (V.A.G 1318) with shut-off valve and adapter. Nominal value at idle speed is...
Pressure regulator To measure pressure, a suitable pressure gauge is required (V.A.G 1318) with shut-off valve and adapter. Nominal value at idle speed is...
Checking the idle speed and exhaust gases
With the Motronic ignition/injection system, no adjustment work is required, as this system is "self-learning". This means that the control unit adjusts the...
With the Motronic ignition/injection system, no adjustment work is required, as this system is "self-learning". This means that the control unit adjusts the...
Exhaust Gas Test (AU)
In Germany, the first exhaust gas test is required for vehicles with a regulated catalytic converter three years after the date of first approval and then...
In Germany, the first exhaust gas test is required for vehicles with a regulated catalytic converter three years after the date of first approval and then...
Motronic throttle cable
In the passenger compartment, the throttle cable (1) with its nipple (3), under which a spring is placed, is suspended in a forked eye on the upper end of the...
In the passenger compartment, the throttle cable (1) with its nipple (3), under which a spring is placed, is suspended in a forked eye on the upper end of the...
Help with Motronic faults
Malfunction Its reasons Your help A. Cold engine does not start or starts poorly 1. Defective fuse 15, 28, 29, 32 or 34 2. Power supply relay defective 3. The...
Malfunction Its reasons Your help A. Cold engine does not start or starts poorly 1. Defective fuse 15, 28, 29, 32 or 34 2. Power supply relay defective 3. The...
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