Toyota Camry

1992-1997 of release

Repair and car operation



Kamri's Toyota
+ General data
+ 1. Maintenance
+ 2. Engine
+ 3. Six-cylinder V6 engines
+ 4. Major maintenance of engines
+ 5. Cooling and heating
+ 6. Fuel system
+ 7. Ignition system
+ 8. Toxicity fall
+ 9. Transmission
+ 10. Automatic transmission
+ 11. Coupling and power shafts
+ 12. Brake system
+ 13. Suspension bracket
+ 14. Body
- 15. Electric equipment
   15.2. General information
   15.3. Electric chains
   - 15.4. Detection of not closed chain
      15.4.2. Detection of a rupture of a chain
      15.4.3. Detection of a source of short circuit
      15.4.4. Detection of bad grounding
   15.5. Safety locks
   15.6. Relay
   + 15.7. Multipurpose switches of a steering column
   + 15.8. Ignition lock
   15.9. Switch of a heater of back glass
   15.10. Check of a heater of back glass
   15.11. Radio receiver
   15.12. Loudspeakers
   15.13. Aerial
   15.14. Replacement of bulbs of headlights
   15.15. Adjustment of light of headlights
   15.16. Headlight
   + 15.17. Replacement of bulbs of an incandescence
   + 15.18. Screen wiper engine
   15.19. Combination of devices
   15.20. Sound signal
   15.21. System cruise control
   15.22. Window regulators with an electric drive
   15.23. System of the central blocking of locks
   15.24. Rear-view mirrors with the electric drive
   15.25. Safety airbag
   + 15.26. Electric equipment schemes
вакансии - Москва



15.4.4. Detection of bad grounding

GENERAL INFORMATION

The negative plug of the accumulator is connected to "weight" — to metal of a body, the engine or a transmission thus many elements of electric equipment are connected in such a manner that only the positive wire, thus a current approaches to them comes back to the accumulator through body metal. It means that fastening of an element of electric equipment and a body are a part of an electric chain. Thereof, the bad or rusted fastening can cause refusal of work of an element or lead to its unstable or bad work. In particular, bulbs can burn with dim light (especially if in a point of grounding of this bulb grounding of any else included element of electric equipment is carried out), electric motors can slowly work, and also work of one chain can have effect imperceptible at first sight on work of other chain. Do not forget that on many cars grounding wires between some elements, such as engines/transmissions and a body, that is in those places, where пет direct contact between metal elements, because of soft rubber fastenings or a paint coat are used.

For check of reliability of grounding of an element, it is necessary to disconnect the accumulator and to connect one of щупов an ohmmeter to reliably earthed element. Connect another щуп to a wire пли to connection with a body which is necessary for checking. Resistance shown by an ohmmeter should be equal to zero; if is not present, check connection as follows.

If you assume absence of grounding, disassemble connection and clear a site of a body and the wire plug (or a surface of grounding of an element) to pure metal. Carefully remove all traces of dirt, then by means of a knife remove all paint so that reliable contact of two metal surfaces turned out. At assembly, reliably tighten socket fastening; at connection of the plug of a wire, establish a washer with the jagged edges between the plug and a body surface for ensuring reliable connection. At connection, prevent emergence of corrosion in the future, having put a layer of vaseline or silicone greasing.