8.4. Search and elimination of malfunctions

Malfunction
Probable causes
Elimination method
The engine is not started at a temperature below 50 °C Unreliable connection in the socket or damage of a wire Repair or replace an electrical wiring
Damage of the sensor of temperature of cooling liquid Replace the sensor
Damage of a glow plug Replace a glow plug
Damage of the control unit of system of preliminary heating Check the control unit and, if necessary, replace it
After the first flash the engine stops or unstably idles at a temperature below 50 °C Unreliable connection in the socket or damage of a wire Repair or replace an electrical wiring
Damage of a glow plug Replace a glow plug
Damage of the relay of candles of an incandescence Replace the relay of candles of an incandescence
Damage of the control unit of system of preliminary heating Check the control unit and, if necessary, replace it
The control lamp of yellow color does not burn The lamp fused Replace a lamp
Unreliable connection in the socket or damage of a wire Repair or replace an electrical wiring
Short circuit of an electrical wiring Repair or replace an electrical wiring
Damage of the control unit of system of preliminary heating Check the control unit and, if necessary, replace it