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BELARUS-920.4/952.4
2 TRACTOR COMPONENTS DESCRIPTION AND OPERATION
2.1 D-245.43S3А/D-245.5S3А engine
Information about the design, troubleshooting, rules of operation and maintenance of the D-
245.43S3А/D-245.5S3А engines are described in the engine operating manual 245 S3A – 0000100
OM applied to your tractor.
2.2 Electronic engine control system for D-245.43S3А (D-245.5S3А)
2.2.1 General Information
The electronic engine control system (Figure 2.2) includes the electronic unit 7, the infor-
mation display 3, the control panel 4, the engine mode manual control lever 5, the engine mode
electronic foot pedal 8, the switching and protection unit 6, which are installed in the tractor cab
and connected to each other by cables 1. The system is powered from the battery via the switching
and protection unit as per the electric circuit diagram presented in Figure 2.4.
After the starter and instrument switch is turned from the "OFF" to "Instrument power" posi-
tion, the system is powered up. When the supply voltage is supplied, the system performs self-
diagnostics. If no errors in system operation are found, the failure signal indicator 2 (Figure 2.1) on
the engine control system panel should go on and off, and the information display 4 (Figure 2.1)
switches to the operating mode. If an error is found, the information display emits a sound signal, and
the screen shows a short description of detected errors (error code designation and its description), as
well as the failure signal indicator 2 on the engine control system panel flashes or blinks. Error code
interpretation as well as advised actions for troubleshooting of the detected errors are described in the
engine operating manual 245 S3A – 0000100 OM enclosed to your tractor. Eliminate detected errors
before starting the engine.
The engine is started by turning and holding the starter and instrument switch in the "Starter
ON" position. After the engine starts, the display shows actually measured parameters of engine
operation.
Figure 2.4 shows the electric circuit diagram of the external part of the control system of
the D-245.43S3А/D-245.5S3А engines of the BELARUS-920.4/952.4 tractor.
1 – diagnostics activation button switch; 2 - failure diagnostics indicator; 3 – cigarette light-
er; 4 – information display; 5-panel; 5 - appliance receptacle 12 V/ 25 A.
Figure 2.1 - Engine control system panel
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