Check the details of the injection Mono-Motronic

5.4.1. Check intake air heating device

In Fig. 111, 112, 113, 114, 115, 116, 117 shows an arrangement of individual parts.

When checking the details of the system of injection Mono-Motronic need to pay attention to the following:

- The thermostat 3 (see. Fig. 111) serves to adjust the intake air heating;

- When entering the clamp with wire fuse in the housing 5 of the thermostat to check the reliability of its fixing;

- Always replace the O-ring 6 of circular cross section, if the sensor is removed 7 overheating;

- Preregreva sensor 7 is connected to the remote thermometer in the instrument panel (in the wiring diagram referred to as G2). If it must be removed, it is necessary to carefully open the expansion tank cap when the engine is still warm enough;

- A central plug 9 removed only after switching off the ignition. Before disconnecting the plug to press the clip;

- The control unit 10 is installed on the right side near the end wall of the engine compartment on the frame 11;

- Hose 12 connects the hot air intake housing 15 with an air filter;

- Heating the air inlet hose 13 is connected to the collector of the warm air on the exhaust manifold to the muffler;

- Nasechnye pins 14 are used to fasten the wire 20;

- Air intake housing 15 has a regulating valve to heat the intake air;

- 17 Fuel hose clamps with spring-mounted terminals. The hose has a white marking and connected at the other end with the fuel filter;

- Recycling fuel hose 18 is secured with clamps with spring clips. The hose has a blue label and placed in the fuel tank;

- A lambda sensor 19, designated as an electrical schematic G39, mounted in front of the exhaust. If it is taken out, the setup should lubricate thread special plastic lubricant G5, and thus to prevent it from entering into the grooves on the sensor housing. Tightening torque is 55 Nm. The sensor is electrically heated. Reliable heating control is possible only in a workshop. Fuse number 18 and the relay for the fuel pump must operate reliably to ensure the functioning of the sensor.

To check the supply voltage, do the following:

- Remove the four-pole connector 21 and check it with the help of the battery connected between terminals 1 and 2 (see. Fig. 113) voltmeter after starting the engine. The reading should not be less than 11 V. If there is no check wiring connection. Again, switch the ignition off and a connector;

- If necessary, dismantle the wires 20 (see. Fig. 111) must be removed nasechnye pins. To do this, screw the self-tapping screws and remove the pins using the collet.

In carrying out major repairs necessary to dismantle the engine wiring harness. To help with the re-installation and connection attached Fig. 114, which shows a gasket harness connected to the engine;

- A connector 21 (see. Fig. 111) connected to the lambda sensor and the lambda sensor heating. It is in the holder on the gearbox;

- Always replace the gasket 22;

- Which is under suction vacuum hose 25 extends between the inlet manifold and the brake booster;

- Water hose 26 is connected to the thermostat housing. He leads the coolant needed to heat the fuel.

Fig. 115 shows the upper part of the injector mount. The works can be carried out on the basis of this figure as follows:

- A bolt 6 (Fig. 115), tighten to 5 Nm. When set to lubricate the threads of the retaining means D6 samootvorachivaniya threaded connections;

- Part 7 holds the upper portion of the injector 1, it is inserted into the intake air temperature sensor. It is listed in electric circuits as the G42;

- Sealing rings of circular cross section 3 always be replaced when replacing the injector 8. The last indicated in the wiring diagrams as the N181;

- When removing the pads 10 to remember its exact position for installation. If damaged enable set a new gasket;

- Knob 2 adjusts the fuel pressure in the fuel pressure. When disconnecting the fuel lines should proceed with caution, as the possible release of fuel;

- Safety washer 4 must be removed to install a new O-ring;

- To the connection 9 connected the fuel supply of fuel, indicated by the arrow for clarity;

- 13 connected to the workpiece fuel return pipe, which is also indicated by the arrow.

If you want to dismantle the lower part of the injection system, it is necessary to consider the following recommendations:

- Servo motor 1 (Fig. 116) adjusts the throttle opening and closing the throttle valve, a built-in switch of idling (electrical schematic - V60). When installing it is necessary to remember that the idling switch is actuated only by means of a plastic switch plates with stop screw;

- Switch 3 idling, controlled diagnostic system adjusts throttle position (in electrical circuits designated F60). When replacing a circuit breaker must also be replaced, and the servomotor 1 move the throttle. Tappet switch is installed with a certain clearance relative to the limiter, which can be measured only by using a special adapter that reduces the battery voltage to 6 V. The switch is about securing the throttle cable;

- This protection against 4 holds the throttle cable. The cable is adjusted by moving the fastening clamp on the counter support. Adjust the rope should be such that the roller lever throttle to ensure its full opening. The maximum permissible roll gap at the throttle lever is 1.0 mm;

- Stop screw 6 is used to adjust the throttle potentiometer 12 (this work should be done in an automobile repair shop). Stop screw is adjusted and sealed at the factory. Screw in any case can not turn away;

- In place of compound 9 joins the hose to the canister. When removing the connections necessary to replace them beyond the O-ring 11 of circular cross section;

- The connection 10 is connected through a hose to the intake air heating device;

- Throttle potentiometer 12 (electrical schematic symbols - G69) can not be setup. If he became insecure work, replace the lower part of the injector fuel injection system.