Mercedes-Benz E-class W123 - Repair manual and operation

2.6. System of injection of L-Jetronic fuel

System of injection of L-Jetronic fuel

1 — the fuel tank 2 — the fuel pump 3 — the fuel filter 4 — the distributive highway 5 — pressure regulator 6 — an electronic control unit (the micro COMPUTER) 7 — an injection nozzle 8 — a starting nozzle 9 — the adjusting screw of idling (M102.920 engine) 10 — a potentiometer of a butterfly valve 11 — a butterfly valve	12 — the air consumption measuring instrument 13 — the inclusion relay block 14 — the sensor of concentration of oxygen 15,16 — the temperature sensor 17 — the ignition sensor distributor 18 — the valve of additional air supply 19 — the adjusting screw of quality (structure) of mix of idling 20 — the rechargeable battery 21 — the ignition lock 22 — the air temperature sensor

Function chart of system of injection of L-Jetronic fuel

19 — a safety lock 20 — the ignition coil 24 — a starter 30 — the relay of inclusion of a starter 71 — the fuel pump 90 — the relay block 91 — additional resistors 97 — nozzles 98 — temperature sensor	99 — the main point of connection with "weight" 100 — the socket of an electronic control unit 101 — the relay of launch of the cold engine 102 — the switch of a butterfly valve 103 — a thermal timer 104 — the air consumption measuring instrument 105 — a starting nozzle

Details of system of injection of engines M 102

And — the 1st option
B — the 2nd option

1 — draft of the drive of a butterfly valve 2 — the case of a butterfly valve 3 — the fuel tank 4 — the fuel electric pump 5 — the fuel filter 6 — the fuel store 7 — the fuel batcher distributor 8 — the fuel pressure regulator in system 9 — the fuel supply pipeline to a nozzle 10 — a nozzle	11 — a starting nozzle 12 — the valve of additional air supply (system of injection of "LE") 13 — the valve of additional air supply (system of injection of "LE") 14 — the inlet pipeline 15 — the case of the air filter 16 — the filtering element 17 — the air duct 18 — laying

Arrangement of elements of system of injection of engines M 102

1 — the fuel batcher distributor 2 — an air flowmeter 3 — the regulator of the operating pressure 4 — the fuel pressure regulator in system 5 — a starting nozzle 6 — the conic screw of adjustment of idling	7 — the sensor of provision of a pressure head disk of a flowmeter of air 8 — the switch of a butterfly valve 9 — the valve of additional supply of fuel 10 — the sensor of temperature of cooling liquid 11 — an electronic control unit

Check of nozzles

PERFORMANCE ORDER

It is the best of all to check serviceability of nozzles by means of the control Bosch 6E84.100.202 device in provisions 6 — the 10th switch of programs. If it is absent, then serviceability of nozzles can be checked as follows: Disconnect blocks from nozzles. Include ignition. Check the voltmeter tension on both contacts of a block. The electrical wiring and an electronic control unit are serviceable if the voltmeter shows identical tension on both contacts. Nozzles are calculated on tension of 3 Century. Attach blocks to nozzles. Muffle the fuel supply pipeline to a starting nozzle. Remove nozzles. Disconnect a wire from the ignition distributor. Include a starter. Nozzles have to inject fuel at regular intervals.