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2.7.7.2. Cars without the European onboard system of diagnostics

Fire of a control lamp of malfunction warns the driver about existence of malfunction in the car. However, if the found malfunction is not shown after 3 consecutive cycles of driving of the car, the lamp dies away. The lamp lights up at once after inclusion of ignition (without launch of the engine) that indicates its serviceability.
The list of malfunctions at which the control lamp of malfunction lights up:
– the warmed-up oxygen sensor is faulty;
– it is faulty absolute pressure;
– the sensor of provision of a butterfly valve is faulty;
– the sensor of temperature of cooling liquid is faulty;
– the idling regulator is faulty;
– nozzles are faulty;
– the control unit of the engine is faulty.

Check
1. Make sure that after inclusion of ignition the lamp burns approximately during 5 with, then dies away.
2. If the lamp does not light up, then wire breakage, burn-out of a safety lock or the lamp is the possible reason.

Self-diagnostics
The control unit of the engine gives the operating commands for actuation mechanisms processes signals of sensors (some teams and signals constantly, and others – only under certain conditions). If EBU finds an aberration, he writes down a diagnostic code of malfunction and gives a signal on the socket of a data line. The result of diagnostics is displayed by fire of a control lamp of malfunction or on the HI-SCAN device. Diagnostic codes of malfunction (DTC) are stored in memory of EBU until tension from the rechargeable battery moves. However codes of malfunction are removed at shutdown of the rechargeable battery or separation of the EBU socket, or by means of the HI-SCAN device.

NOTE
At disconnected blocks of wires from any sensor at the included ignition the malfunction code registers. In this case it is necessary to remove a malfunction code, having disconnected minus a wire "-" from the rechargeable battery.