2.18.2. Idling stabilization
Digifant control unit and lambda probe
1. Connection with weight Is fixed on a body 2. Connecting plug. To disconnect the plug only at the switched-off ignition 3. Digifant control unit. The lambda adjustment, shift of the moment of ignition operates system of injection and ignition, the idling stabilization valve. An installation site – in a motor compartment at the left in the direction of the movement. After replacement of the control unit it is necessary to adjust a potentiometer of a butterfly valve on new control unit
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4. Shtekerny connection lambda probe and heating lambda probe. Installation site: on an arm of hinged units on the right in the direction of the movement. Lambda adjustment: contact (3 – lilac). A lambda probe to check giving of tension for heating at the working engine between contacts (1 – red/black) and (2 – brown). The required value: tension of the rechargeable battery (12 V). To check an ohmmeter white wires of heating a lambda probe on the plug a lambda probe 5. Lambda probe. Installation site: on a forward exhaust pipe near a flange. To grease a carving with VWG65 lubricant. Lubricant should not get to the shlitsevy area of the case a lambda probe F – a vacuum hose to the backpressure valve of the amplifier of brakes. |
Work check
PERFORMANCE ORDER |
1. To include ignition. |
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2. The valve (1) of stabilization of idling has to vibrate and buzz. If is not present, to check adjustment. |
3. To switch off ignition. |
4. To disconnect the plug from the valve and to check valve resistance. Resistance see in subsection 2.18.8. |
5. If values do not correspond, to replace the valve. Otherwise to find and eliminate break in an electrical wiring to the control unit according to the electrical circuitry. |
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Adjustment check
PERFORMANCE ORDER |
1. Check conditions: temperature of engine oil not less than 80 °C, turns of idling are adjusted correctly. The system of absorption of air is tight. |
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2. To check current of management. For this purpose to connect the ampermeter. |
3. To start the engine and to allow to work idling. |
4. About 1 min. later three times "to give gas" (with turns every time is slightly higher than 3000 rpm) and to measure current on single turns. The required value see in subsection 2.18.8. |
5. To disconnect the plug from the sensor of temperature of cooling liquid (shooter). To measure current (the required value see in subsection 2.18.8). |
6. If conditions of check are met, and values do not coincide, then the Digifant control unit is, as a rule, faulty. |
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7. To interview memory and to erase record. As a result of a detachment of the plug (shooter) from temperature sensor, in memory malfunction was written down. |
Prevention
Current of control of the stabilizer of idling depends on engine loading in operating time of the engine idling. As a result of the following loadings current of management can fluctuate between 400–1000 мА:
– cold engine; – the conditioner is switched on; – electroconsumers are included; – power steering: the wheel is turned; – the adjusting screw of turns of idling is screwed up against the stop; – wrong adjustment of the moment of ignition.
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