Toyota Corolla

1992-1998 of release

Repair and operation of the car



Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling systems, heating
+ 5. Fuel, exhaust systems
- 6. System of decrease in toxicity
   6.1. Specifications
   6.2. Electronic control system
   6.3. Electronic control unit
   + 6.4. System of onboard diagnostics
   - 6.5. Sensors of system of automatic control of the engine
      6.5.1. Sensor of temperature of cooling liquid
      6.5.2. Sensor of concentration of oxygen
      6.5.3. Sensor of an angle of rotation of a butterfly valve (TPS sensor)
      6.5.4. The sensor of absolute pressure on the soaking-up collector (MAR-sensor)
      6.5.5. The air temperature sensor on the soaking-up collector (IAT sensor)
      6.5.6. Temperature sensor of system of recirculation (EGR sensor)
      6.5.7. Car speed sensor (VSS sensor)
      6.5.8. Detonation sensor
      6.5.9. Sensor of an angle of rotation of the crankshaft
   6.6. System of catching of vapors of gasoline
   6.7. System of recirculation (EGR system)
   6.8. System of compulsory ventilation of a case (PCV system)
   6.9. Catalytic converter
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment



6.5.8. Detonation sensor

GENERAL INFORMATION

The octane number deviation from norm in modern brands of gasoline can cause a detonation in the engine. A detonation sometimes call "explosion from a spark". In the absence of a detonation the sensor gives tension signal in the control unit which provides optimum installation of a corner of ignition. When the sensor of a detonation registers abnormal splashes in pressure (detonation) there is a disconnection from the control unit and the corner of an advancing of ignition decreases before disappearance of a detonation. At any failures in operation of the sensor in memory the code 52 registers.

Check

PERFORMANCE ORDER
1. The detonation sensor (it is specified by an arrow) is installed from the inside of the engine (from a partition of a motor compartment), under the soaking-up collector. For access to the sensor of a detonation it is necessary to uncover the soaking-up collector and the soaking-up collector (see subsection 3.1.1.4).
2. Connect an ohmmeter to a conclusion of the sensor and to the case. The device has to show the opened chain.
3. If the chain is closed, replace the sensor.