Device and repair of Toyota RAV4 SUVs (Toyota RAV) - Replacement of sensors of a detonation-//

Toyota PAB4-Toyota RAV4
1. Operation of the car
2. Maintenance
3. Engines
4. Cooling systems and conditioning
5. Fuel system and system of production of the fulfilled gases
6. System of ignition
7. The control system and decrease in toxicity of the fulfilled gases
   General information
   Technical characteristics
   System of onboard Diagnostics (OBD)
   Information sensors and executive stroystvo
   Codes of malfunctions of the OBD-II system
   Control unit of the engine (PCM)
   Sensors and valves of system of injection of fuel (EFI)
      Replacement of the sensor of provision of a butterfly valve (TPS)
      Replacement of the sensor of absolute pressure of air in an inlet collector on models since 2001
      Replacement of the sensor of the measuring instrument of a consumption of air (MAF) on models since 2001
      Replacement of the sensor of air temperature coming to the engine (IAT) on models till 2001
      Replacement of the sensor of temperature of cooling liquid (ECT)
      Replacement of the sensor of an angle of rotation of a bent shaft (CKP)
      Replacement of the sensor of position of the camshaft (CMP) on models since 1998
      Replacement of sensors of oxygen (O2S) and fuel-air mix (A/F Sensor)
      Replacement of sensors of a detonation
      Replacement of the sensor of speed of the car (VSS)
      Replacement of the valve of a control system of the frequency of rotation of idling (IAC)
   System of compulsory ventilation of Carter (PCV)
   System of recirculation of the fulfilled gases (EGR) on models since 2001
   System of catching of vapors of fuel (EVAP)
   Catalytic converter
8. Coupling
9. Transmission
10. Driveshaft and shaft of the drive of driving wheels
11. Brake system
12. Suspension bracket
13. Steering and running gear
14. Body
15. Electric equipment
Schemes of electric equipment


Toyota RAV4>> The control system and decrease in toxicity of the fulfilled gases>> Sensors and valves of system of injection of fuel (EFI)>> Replacement of sensors of a detonation
Replacement of sensors of a detonation needs to be made on the cold engine.
The engine can be damaged as a result of the detonation arising at combustion of fuel mix. The high extents of compression improving fuel profitability of the engine and change of quality of the used fuel increase tendency of the engine to a detonation, i.e. explosive combustion of fuel mix in engine cylinders. The sensor of a detonation reacts to high-frequency fluctuations of the block of cylinders and transforms them to electric signals which size increases at increase in a detonation. On the basis of these signals the control unit of the engine displaces the ignition moment towards delay, during a certain number of steps then gradually returns in initial situation. The sensor of a detonation is located on the back party of the block of cylinders, directly under a block head.
You make replacement of sensors of a detonation as follows:
– switch off ignition and disconnect a wire of "weight" from the rechargeable battery;
– merge cooling liquid from the cooling system;
– on models till 2001 and on all-wheel drive models remove an inlet collector;
– on front-wheel models till 2001 lift a forward part of the car and fix on support;

Fig. 7.19. The detonation sensor on models till 2001: 1 – electric socket; 2 – detonation sensor


Fig. 7.20. The detonation sensor on models since 2001: 1 – electric socket; 2 – detonation sensor


– disconnect the electric socket, turn out and remove the sensor of a detonation (fig. 7.19, 7.20) .
At installation of the sensor of a detonation apply a sealant layer on its carving.
Screw the sensor and tighten its moment 44 N • m.

       NOTE
The carving of the new sensor is already covered with sealant.

You make further installation in the sequence, the return to removal. After installation of the sensor fill in cooling liquid in the cooling system.