5.7.2. Check of a control system by the engine

The electronic control unit constantly запитывается from the storage battery through a conclusion «38» protected by a safety lock No. 41 (7,5 And), being in the assembly block of a motor compartment. At turning on of the switch of devices and a starter tension from the storage battery arrives on conclusions «25» both «37» EBU sockets and a conclusion «7» electromagnetic valves останова a diesel engine on a chain protected by the fuse No. 25 (10 And), being in the assembly block of salon of the car. Besides, the resolving signal from an immobilizer through a conclusion «30» connects a conclusion of "106" blocks of the EBU socket that leads to short circuit of a power chain of the relay of inclusion before - and poststarting heating on "weight". At operation of the specified relay tension moves on heating candles during time depending on temperature of cooling liquid. Permission to start-up of the EBU engine receives through a conclusion «28» on a chain protected by the fuse No. 26 (7,5 And), being in the assembly block of salon of the car. On cars with the conditioner at operation of the engine idling the conclusion of "8" blocks of the EBU socket is connected on "weight" on a chain protected by the fuse No. 6 (7,5 And), a food moves on the relay of turning on of the conditioner. At operation of the specified relay the compressor of the conditioner and tension turns on arrives on the electromagnetic valve of the accelerated idling on a chain protected by the fuse No. 30

(7,5 And). Checks are carried out according to indications of tab. 3.15 — 3.17.

Order of connection of the control device to conclusions	Check conditions	Result of check, control values	Possible malfunction
Conclusion «38» EBU and massa sockets	The switch of devices and starter is switched off	U=Uак. Bath.	Wire break between the storage battery and a conclusion «38» EBU sockets. The safety lock No. 41 burned down. Unreliability of connections in the assembly block of a motor compartment
Conclusions of "1" socket of the relay of inclusion of prestarting heating and "weight"	The same	The same	Wire break between a conclusion of "1" relay of prestarting heating and the storage battery. The safety lock No. 41 burned down
Conclusion «2» sockets of the relay of inclusion of prestarting  heating  and "weight"	»	»	The relay of inclusion of prestarting heating is faulty
Conclusion «106» EBU and massa sockets	»	»	Wire break between a conclusion «2» sockets of the relay of inclusion of prestarting heating and a conclusion «106» EBU sockets
Conclusion «3» sockets of the relay of inclusion of prestarting  heating  and "weight"	»	»	Wire break between the storage battery and a conclusion «3» sockets of the relay of inclusion of prestarting heating. The safety lock "and" in the assembly block of a motor compartment burned down. Unreliability of connections in the assembly block of a motor compartment
Conclusion of "1" socket of the switch of devices and starter and "weight"	»	»	Wire break between the storage battery and a conclusion of "1" socket of the switch of devices and a starter. «i» safety lock in the assembly block of a motor compartment burned down. Unreliability of connections in the assembly block of a motor compartment
Conclusions «3» sockets of the relay of turning on of the electromagnetic   coupling of the compressor of the conditioner and "weight"	»	»	Wire break between the storage battery and a conclusion «3» sockets of the relay of turning on of the electromagnetic coupling of the compressor of the conditioner. The safety lock No. 30 in the assembly block of a motor compartment burned down. The safety lock «д» in the assembly block of a motor compartment burned down. Unreliability of connections in the assembly block of a motor compartment
Conclusion  of "1"  socket of an immobilizer      and "weight"	»	»	Wire break between the storage battery and a conclusion of "1" socket of an immobilizer. The safety lock No. 24 in the assembly block of salon of the car burned down. Unreliability of connection of wires in the assembly block of salon of the car
Conclusion «2» and «3» sockets of the switch of devices and starter and "weight"	To turn a key in the switch of devices and a starter in the situation "ASS", then in the situation "ON"	»	The switch of devices and starter is faulty
Conclusions  «25»,   «37» EBU and massa sockets	To turn a key in the switch of devices and a starter in the situation "ON"	»	Wire break between the switch of devices and a starter and conclusions «25», «37» EBU sockets. The safety lock No. 25 in the assembly block of salon of the car burned down. Unreliability of connection of wires in the assembly block of salon of the car
Conclusion «2» sockets of an immobilizer and "weight"	The same	»	The immobilizer is faulty
Conclusion «30» EBU and massa sockets	»	»	Wire break between a conclusion «2» immobilizers and a conclusion «30» EBU sockets
Conclusion  «7»  TNVD and massa sockets	»	»	Wire break between the switch of devices and a starter and the electromagnetic valve останова a diesel engine. The safety lock No. 25 in the assembly block of salon of the car burned down. Unreliability of connection of wires in the assembly block of salon of the car
Conclusion «5» sockets of the relay of inclusion of prestarting  heating  and "weight"	»	»	The relay of inclusion of prestarting heating is faulty
Wire of a food of candles of an incandescence and "weight"	»	»	Break of the wire connecting a conclusion of "5" relays of prestarting heating and a glow plug
106 socket of EBU and "weight"	To turn a key in the switch of devices and a starter in the situation "ON"	U=0	EBU is faulty
Conclusion «6» sockets of the switch of devices and starter and "weight"	To turn a key in the switch of devices and a starter in the situation "ST"	U=Uак. Bath.	The switch of devices and starter is faulty
Conclusion «28» EBU and massa sockets	The same	The same	Wire break between a conclusion «28» EBU sockets and a conclusion «5» sockets of the switch of devices and a starter. The safety lock No. 26 in the assembly block of salon of the car burned down. Unreliability of connections of wires in the assembly block of salon of the car
Conclusion of "1" socket of the relay of turning on of the electromagnetic coupling of the compressor of the conditioner and "weight"	The engine idles, the conditioner is switched off	»	Wire break between the switch of devices and a starter and a conclusion of "1" socket of the relay of turning on of the electromagnetic coupling of the compressor of the conditioner. The safety lock No. 6 in the assembly block of salon of the car burned down. Unreliability of connections of wires in the assembly block of salon of the car
Conclusion «2» sockets of the relay of turning on of the electromagnetic coupling of the compressor of the conditioner and "weight"	The same	»	The relay of turning on of the electromagnetic coupling of the compressor of the conditioner is faulty
Conclusion «8» EBU and massa sockets	»	»	Wire break between the relay of turning on of the electromagnetic coupling of the compressor of the conditioner and EBU. The sensor of pressure of a coolant is faulty
Conclusion «5» sockets of the relay of turning on of the electromagnetic coupling of the compressor of the conditioner and "weight"	The engine idles, the conditioner is switched on	»	The relay of turning on of the electromagnetic coupling of the compressor of the conditioner is faulty
Conclusion of "1" socket of the electromagnetic valve of the accelerated idling and "weight"	The same	»	Wire break between a conclusion of "1" socket of the electromagnetic valve of the accelerated idling and a conclusion of "5" relays of turning on of the electromagnetic coupling of the compressor of the conditioner

Checked element of system	Conclusions or points of connection of the device	Control values, result of check	Possible malfunction
Sensor of frequency of rotation of the engine	Conclusions «17», «23» and «36» EBU sockets	R= 1,6 Ohm	The sensor of frequency of rotation of the engine is faulty. Wire break between a conclusion «4» sockets of the sensor and conclusions «23», «36» EBU sockets. Wire break between a conclusion «5» sockets of the sensor and a conclusion «17» EBU sockets
The sensor of temperature of cooling liquid	Conclusions «15», «23» and «36» EBU sockets	Value of resistance at temperature: 11,5кОмпри 15 ° With; 5,6 kiloohms at 0 ° With; 3,7кОмпри 10 ° With; 1,2 kiloohms at 40 ° With	The sensor of temperature of cooling liquid is faulty. Wire break between a conclusion of "1" socket of the sensor and a conclusion «13» EBU sockets. Wire break between a conclusion «2» sockets of the sensor and conclusions «23» and «36» EBU sockets
Electromagnetic valve of regulation of a corner of an advancing of injection of fuel	Conclusion «108» EBU sockets and case of the electromagnetic valve	R= 0,5 Ohm	The electromagnetic valve of regulation of a corner of an advancing of injection of fuel is faulty. Unreliability of connections in a bunch of wires
	Case of the electromagnetic valve of regulation of a corner of an advancing of injection of fuel and "weight"	R= <0,5 Ohm	Unreliability of contact in a point of connection of "weight" of the valve and TNVD
The electromagnetic valve of the accelerated idling	Conclusions «1» and «2» sockets of the valve	R= 39 Ohm	The electromagnetic valve of the accelerated idling is faulty
	Conclusion «2» sockets of the valve	R= <0,5 Ohm	-
The sensor of existence of a key in the lock of the switch of devices and a starter	Conclusions «1» and «2» sockets of the sensor	The key is not inserted into the lock - R = infinity. The key is established in the lock - R <0,5 Ohm	The sensor of existence of a key in the lock of the switch of devices and a starter is faulty
Sensor of speed of movement of the car	Conclusions «1» and «2» sockets of the sensor	R= 250 Ohm	The sensor of speed of movement of the car is faulty
Points of connection of weight of EBU	Conclusion «26», «39», «101» and «195» EBU and massa sockets	R <0,5 Ohm	Wire break between conclusions «26», «39», «101» and «106» and "weight"

Checked element of system	Conclusions or points of connection of the device	Control values, result of check	Possible malfunction
The sensor of temperature of cooling liquid	Conclusions «15», «23» and «36» EBU*	U= 5B	EBU is faulty
Sensor of frequency of rotation of the engine	Conclusions «17», «23» and «36» EBU **	Tension change from 0 to 5 In depending on frequency of rotation of the engine	The sensor of frequency of rotation of the engine is faulty
The sensor of speed of movement of the car (at car movement)	Conclusions «1» and «2» sensors **	Tension change from 0 to 5 In depending on speed of movement of the car	The sensor of speed of movement of the car is faulty
Electromagnetic valve of regulation of a corner of an advancing of injection of fuel	Conclusion «6» TNVD and massa sockets ***	U= 12 In	EBU is faulty

Fig. 3.43. Numbering of conclusions of a block of wires of the EBU socket of the CD20 engine (rear view)

The NOTE to tab. 3.16 Checks are carried out on conclusions of a block of wires of the EBU socket (see fig. 3.43), thus the plug socket should be disconnected from EBU. During measurements plug sockets of checked devices are not disconnected.

The NOTE to tab. 3.17 Checks are carried out on conclusions of a block of wires of EBU (see fig. 3.43) at the joined shtekerny socket. For simplification of checks it is necessary to use the transitional block connected consistently between EBU and its shtekerny socket.

PREVENTIONS That at check and adjustment COURT not to get traumas and not to put out of action system knots, observe the following rules: — do not allow operation of the engine if clips of wires are badly fixed on plugs of the storage battery; — do not disconnect a wire from plugs of the storage battery on the working engine; — disconnect the storage battery from an onboard network at its charging on the car from an extraneous source of a current; — do not start the engine by means of an extraneous source tension more than 12 In; — do not separate the EBU socket at the included ignition; — before connection of plug sockets be convinced of absence of damages and oxidation traces on contacts of vilochny and rozetochny parts, and also in reliability of connection of sockets; — make sure available a rubber sealant of blocks and a fixing spring; — the damaged spring replace; — before work on the car with electric welding application including dot, separate the EBU socket. — remove EBU if the car is exposed to influence of temperatures from above 80 ° With (for example, before a room of the freshly painted car in the drying chamber); — before compression check in cylinders separate the plug socket (gray color on TNVD) the electromagnetic valve останова a diesel engine; — do not check a wire and their connection by a control lamp; — do not check «on a spark» tension existence in a chain; — disconnect the storage battery before measurement of resistance of elements of electric equipment of the car; If the car is equipped with an autoradio tape recorder with a code, before shutdown of the storage battery remember a code of inclusion of an autoradio tape recorder. At checks it is forbidden to attach tips of lengthening wires of the control device to socket conclusions. It is necessary to shift a protective cover of a block and to attach tips from an entrance of wires in a block or to use a special terminal block. In the latter case marking of conclusions of a terminal block should correspond to marking of conclusions of the EBU socket.

Before check COURT perform the works described below, and eliminate the malfunctions revealed thus:

— be convinced of normal work of a chain of start-up of the engine: storage battery, power wires and starter;

— be convinced available enough of fuel of the corresponding quality, of the correct installation of the fuel filter, and also that the filter is not littered;

— check tightness of systems of a retsirkulyatsiya паров fuel and karterny gases, and also a condition of hoses of system (should not be pressed);

— check air intake system: pipelines and laying should be tight, collars are tightened, the filtering element should be pure; the system of a retsirkulyatsiya of the fulfilled gases should be serviceable, pipelines are tight;

— check a condition of a chain of prestarting heating: an integrity and compliance of wires to recommended characteristics;

— the engine power supply system fuel should be tight, podtekaniye in unions and pipelines are not admissible;

— be convinced of tightness of system of production of the fulfilled gases; check a condition and adjustment of a cable of a drive of management by supply of fuel: a course from an emphasis against the stop and ease of moving; length of a course of a control lever supply of fuel depending on the provision of a pedal;

— estimate a technical condition of the engine: compression, installation of an initial corner of an advancing of injection of fuel, tightness of laying of a head of the block of cylinders, TNVD condition etc.