Check of the EPHH control unit. AZLK 2141 (Muscovite)
Service and car repairs of 2141 - the Muscovite.
1. General data
2. Engines
3. Power supply system
4. Cooling system
5. Transmission
6. Running gear
7. Tires, wheels
8. Steering
9. Brake management
10. Body
11. Electric equipment
11.1. Wires and safety locks
11.2. Block of safety locks and relay
11.3. Scheme of internal connections of the block of safety locks and relay
11.4. Rechargeable battery
11.5. Electric equipment installed on cars of fashion. 2141-01, 2335
11.6. Electric equipment (21412-01, 214122, 214123 and 23352, 233522, 233523)
11.6.1. Generator 581.3701
11.6.2. Starter 4216.3708
11.6.3. System of ignition of the engine of fashion. 331i 3317
11.6.3.1. Distributor of ignition 47.3706
11.6.3.2. B115-V ignition coil
11.6.3.3. Spark plugs
11.6.3.4. Economizer of Compulsory Idling (ECI)
11.6.3.5. EPHH control unit
11.6.3.5.1. Check of the EPHH control unit
11.6.3.5.2. Possible malfunctions of the EPHH control unit
11.6.3.6. Sensor screw of provision of a butterfly valve
11.6.3.7. EPHH electromagnetic valve
11.6.3.8. Sensor of emergency pressure of oil
11.6.4. System of ignition of the engine of fashion. 3313
11.7. Electric equipment (2141-01, 21412-01, 214122, 214123 e 2335, 23352, 233522, 233523)
11.8. Control devices
12. Electrical circuitries
 










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11-6-3-5-1-proverka-bloka-upravleniya-ehpkhkh.html

11.6.3.5.1. Check of the EPHH control unit

The control unit is checked on the car.

PERFORMANCE ORDER
1. Smoothly opening a butterfly valve, to increase the frequency of rotation of a bent shaft of the engine to the value exceeding 1245 min.-1 and to record this situation.
2. To remove the plug from a conclusion of the sensor screw and to connect it to "mass" of the car. At the same time there has to be "a self-oscillatory mode" of operation of the engine which is followed by a pulsation of frequency of its rotation.
3. If it is not possible to cause "the self-oscillatory mode", and the electromagnetic valve has no defect, then the control unit is faulty and needs replacement.
4. An inspection of the control unit can be carried out by direct control of frequency of rotation with which there is an operation of the block, according to indications of a tachometer. For this purpose it is necessary to disconnect the plug from a conclusion of the electromagnetic valve and to connect it to one of conclusions of a control lamp (a low-power electric lamp, 12 V) which second conclusion to connect to "mass" of the car. For ensuring operation of the electromagnetic valve to connect its released conclusion by means of an auxiliary wire to a positive pole of electric network (+ 12B).
5. On the idling mode (850±50 min.-1) to remove the plug from the sensor screw. The control lamp has to burn at the same time.
6. Opening a butterfly valve, to increase the frequency of rotation of a bent shaft approximately up to 1500 min.-1. To connect the plug removed from a sensor screw conclusion to "mass" of the car. The control lamp has to go out at the same time.
7. Smoothly closing a butterfly valve, to reduce the frequency of rotation of a bent shaft. After its falling lower than 1245±5% the min.-1 lamp has to light up.


11.6.3.5. EPHH control unit

11.6.3.5.2. Possible malfunctions of the EPHH control unit