Toyota Camry

1992-1997 of release

Repair and operation of the car



Kamri's Toyota
+ General data
+ 1. Maintenance
+ 2. Engine
+ 3. Six-cylinder V6 engines
+ 4. Capital repairs of engines
+ 5. Cooling and heating
+ 6. Fuel system
+ 7. System of ignition
- 8. Toxicity decrease
   8.2. General information
   8.3. System of electronic control (TCCS)
   8.4. System of self-diagnostics
   - 8.5. Sensors
      8.5.2. Oxygen sensor
      8.5.3. Sensor of provision of a butterfly valve
      8.5.4. Air stream measuring instrument (only engines 3VZ-FE V6)
      8.5.5. MAF sensor of measurement of mass of a stream of air (engine 1MZ-FE V6)
      8.5.6. Sensor of absolute pressure (four-cylinder engines)
      8.5.7. EGR temperature sensor
      8.5.8. Car speed sensor
      8.5.9. The detonation sensor (only with V6 engines)
      8.5.10. Sensor of provision of a camshaft (engine 1MZ-FE V6)
      8.5.11. Sensor of an angle of rotation of a cranked shaft (only engines 1MZ-FE V6)
   + 8.6. Induction system of air supply in the engine (ACIS)
   8.7. System of catching of vapors of fuel (EVAP)
   + 8.8. System of repeated burning of exhaust gases (EGR)
   8.9. System of ventilation of a case (PCV)
   8.10. Catalyst
   8.11. Codes of malfunctions
+ 9. Transmission
+ 10. Automatic transmission
+ 11. Coupling and power shafts
+ 12. Brake system
+ 13. Suspension bracket
+ 14. Body
+ 15. Electric equipment





8.5.2. Oxygen sensor

GENERAL INFORMATION

Prevention

Use only the strelochny voltmeter as it is necessary to watch fluctuation of an arrow.


On cars is established one or two sensors of oxygen. On models with two sensors the main sensor of oxygen is installed in front of the catalyst and controls composition of the exhaust gases which are not cleared by the catalyst. The additional sensor of oxygen controls composition of exhaust gases after they passed through the catalyst. In it is dependent st on the content of oxygen in exhaust gases the sensor induces tension from 0,1 B (the high content of oxygen, poor mix) to 0,9 B (the low content of oxygen, rich mix). On the basis of these data the ESM block changes time of opening of fuel nozzles and changes a fuel ratio in fuel mix.

The sensor of oxygen does not induce any tension at a temperature of sensor less than 315 °C.

 

For a lostup to sockets of the back sensor of oxygen it is necessary to remove a forward seat.

Check of operability of the sensor of oxygen on six-cylinder engines

 


PERFORMANCE ORDER
 
1. For check of the sensor of oxygen disconnect the electric socket from the sensor and connect an ohmmeter to contacts + sensor socket B and NT. Resistance of the sensor has to be in limits of 11-17 Ohms. On models with four-cylinder engines the sensor of oxygen is connected by one wire. On models with six-cylinder engines with an oxygen sensor heater the sensor is connected by the four-contact socket. Later models with four-cylinder engines have two sensors of oxygen, and models with six-cylinder engines have three sensors of oxygen. The block 1 the sensor 1 and the block 2 the sensor 1 are located in front of the catalyst, and the block 1 and the sensor 2 are located after the catalyst. On models with six-cylinder engines for access to the electric socket of the back sensor of oxygen it is necessary to remove a forward seat.
2. Check a condition of an electric chain of a heater of the sensor of oxygen. At inclusion of ignition voltage of 12 V on contacts of the socket (See the tab. has to vat a prisutstvo. "V6 1992 engines and 1993", "V6 engines since 1994").
3. Check tension induced by the oxygen sensor. Connect one wire of a millivoltmetr to the electric socket of the sensor of oxygen, and connect the second wire to weight. Check tension created by the oxygen sensor on contacts (See the tab. "Four-cylinder engines", "Six-cylinder engines 1992 and 1993 of", "Six-cylinder engines since 1994").
4. The size of the signal induced by the oxygen sensor on the cold engine makes from 0,1 to 0,2 B, and after warming up of the engine fluctuates from 0,1 to 0,9 Century.
5. On models 1992 and 1993 of warm up the oxygen sensor up to the working temperature and connect the strelochny voltmeter with contacts of VF1 and E1 of the control socket.
6. On six-cylinder engines connect the strelochny voltmeter to contacts of VF1 and E1 and contacts of VF2 and E1 for check of operability of the sensor of oxygen (See rice. Check of operability of the sensor of oxygen on six-cylinder engines).
7. Start the engine and increase its turns to 2500 rpm for 2 minutes and then close an additional wire contacts of TE1 and E1 of the control socket. Check that the arrow of the voltmeter fluctuates 8 times in 10 seconds.

8. For replacement of the sensor of oxygen remove a weight wire, lift the car, disconnect the socket from the sensor and unscrew the oxygen sensor.


V6 1992 engines and 1993

the additional
black/orange wire (+)
oxygen sensor
brown wire (-)
main No. 1
it is not used
main No. 2
it is not used

V6 engines since 1994

block 1 sensor 1
black/orange wire (+)
brown wire (-)
block 2 sensor 1
black/orange wire (+)
brown wire (-)
block 1 sensor 2
black/orange wire (+)
brown wire (-)

Four-cylinder engines

main sensor of oxygen
white wire
additional sensor of oxygen
red/blue wire

Six-cylinder engines 1992 and 1993 of

main No. 1
white wire
main No. 2
red/blue wire
additional sensor of oxygen
white wire

Six-cylinder engines since 1994

block 1 sensor 1
white wire
block 2 sensor 1
red/blue wire
block 1 sensor 2
black wire