Checking the technical condition of the engine management system (Granta 2190)

The electronic control unit (ECU) of the engine management system has a self-diagnostic mode. When the ignition is turned on, the engine management system malfunction indicator lamp should light up, which indicates that the diagnostic system is working properly. If the engine management system is in good working order, the lamp should go out after the engine starts.

During operation, the ECU monitors the serviceability of all elements and circuits of the engine control system. Having detected a malfunction, the ECU switches the engine management system to the backup operating mode and turns on the engine malfunction indicator lamp located on the instrument panel. The engine will still be able to continue working (except in case of crankshaft position sensor failure), which allows you to get to the repair site under your own power. The ECU records the codes of detected faults into the random access memory (RAM).

To read fault codes, an external diagnostic device must be connected to the engine management system. For this purpose, a diagnostic connector is provided in the system.



You can read the fault codes at a service center that has the necessary equipment.