- behind the left end trim of the instrument panel (circuit breakers);
- on the left side of the engine compartment (fuses and relays);
- above and below block J519 (behind the driver's glove box).
2. The location of the fuses and relays in the mounting blocks, as well as their purpose, is indicated in the Chapter "Electrical equipment diagrams". The purpose of the fuses is additionally indicated on the back of the cover of each mounting block. The fuse or relay number is indicated directly on the mounting block, next to the corresponding relay or fuse.
3. To provide access to the fuse mounting block on the left side of the instrument panel, remove its left end plate by prying it from below with a wrench or a screwdriver (see illustration 15.10 of Chapter 11).
4. To provide access to the mounting block in the engine compartment, open the cover of this block by sliding the latches forward (arrows on resist. illustrations) and pulling the cover up. When sliding the latches, press down on the cover to avoid damaging them.
3.4 Removing the cover of the mounting block in the engine compartment
5. To access the mounting block above the J519 block, remove the driver's glove box; to access the mounting block under J519, additionally remove the air duct to the driver's foot well and the knee airbag.
Circuit breakers
6. Each individual fuse is used to protect a particular electrical circuit or several circuits at once, and one or more fuses can be in one circuit. Mounting blocks mostly use fuses of a compact design, equipped with bayonet contacts, and, if necessary, easily removed from their sockets with fingers or tongs stored in the lid of the mounting block. To remove the fuses with their pliers, stored in the mounting block behind the left end cover. For small fuses, slide the tweezers from above, and for large ones, from the side.
7. In case of failure of any of the consumers of electricity, first of all, you should always check the condition of the corresponding fuse. Turn on the ignition and, using a probe lamp, probe the open terminals of each of the fuses. If the lamp lights up when connected to each of the terminals, then the fuse is good. If there is voltage only on the power supply side, then the fuse is blown. We also note that usually the fuse case is made of transparent plastic, through which it is easy to determine the state of the working jumper.
8. When replacing a blown fuse, make sure that the prepared replacement element matches the type of the failed fuse. Fuses designed for different rated currents may not physically differ from each other in any way, while not being interchangeable. Each of the electrical circuits has different operating parameters and needs a different degree of protection, so replacing a fuse designed for a certain current strength with a fuse with inappropriate parameters is fraught with the most serious consequences (until the fire). The operating parameters of the fuse are usually indicated on its plastic case, in addition, color identification is additionally used.
9. If the new fuse also fails immediately after installation, it does not make sense to replace it further, first the cause of the overload in the circuit should be identified and eliminated. In most cases, this is a short circuit of the connecting wiring, caused by damage to its insulation. Spare fuses are usually placed in the free blocks of the mounting block.
Relay
10. To supply power or control signal to some of the electrical consumers in the vehicle (such as fuel injection system components, horn, starter, cooling fan, fog lights and others) relays are used. In fact, the relay is an electric key that provides the closing of the working circuit according to the control signal. In the event of a relay failure, the corresponding consumer fails to function. A description of the check for proper functioning of the relay is given below. Failed relays must be replaced.
11. If it is not possible to find out how the relay is connected to the corresponding electrical circuit according to the wiring diagrams (diagrams are at the end of the manual), it should be remembered that the approach to checking any relay is basically the same in all cases (see below).
12. In most cases, a control circuit is always connected to two of the contact terminals of the relay. When a control voltage is applied to these terminals, the current begins to circulate through the relay control winding, as a result of which the contacts of the working circuit of the consumer of electricity are closed. The remaining terminals are operating circuit terminals.
13. In order to facilitate the identification of the relay terminals, an explanatory marking is usually applied to its body with an image of the key connection diagram.
14. Before removing the relay, make sure that the corresponding circuit is de-energized.
15. Connect a fused jumper wire between one of the relay control terminals and the positive battery terminal. Using the second jumper wire, ground the second control terminal - the relay should make a click. Some relays require obligatory observance of the polarity of the connection - if there is no click, try changing the polarity of connecting the control terminals.
16. With jumper wires connected, check for continuity between the work circuit terminals.
17. At negative result of check replace the relay.