Subaru Forester
+ Cars Subaru Forester
+ The maintenance instruction
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
- Control systems of the engine
Specifications
System of onboard diagnostics (OBD) - a principle of functioning and codes of malfunctions. Signals in management chains
ЕСМ - the general information, an estimation of a condition and replacement
Information gauges, the relay and actuation mechanisms - the general information
System of catching of fuel evaporations (EVAP)
System recycling the fulfilled gases (EGR)
System of operated ventilation картера (PCV)
The conductor of a jellied mouth of a fuel tank
The Katalitichesky converter - the general information, check of a condition and replacement
+ Gear change box
+ Coupling, трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Information gauges, the relay and actuation mechanisms - the general information
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In order to avoid failure ЕСМ at performance described below checks use only the digital voltmeter with high (from above 10 МОм) an impedance! |
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The car equipped with system OBD-II should be driven away on a car repair shop for reading of codes of malfunctions from application of the special scanner. There are some checks (the causes of failures connected with revealing at engine start) which the owner of a vehicle can execute independently, in all other cases the car should be driven away in car-care centre. |
The gauge-switch of inclusion of the conditioner of air - the general information and a functioning principle
At receipt of a signal from the gauge-switch of inclusion К/В ECM makes necessary updatings of working parametres of the engine (first of all idling turns), called to compensate connected with functioning of the conditioner loading increase.
Full squeezing of a pedal of an accelerator at working К/В automatically leads to time switching-off of compressor K/V that raises приемистость the car during overtaking. The signal about opening throttle заслонки arrives on ECM from TPS (see more low) and the management module immediately develops a command on operation of the disconnecting relay of the compressor.
The gauge of measurement of weight of air (MAF)
The general information and functioning principle
Gauge MAF is fixed in the top cover of an air cleaner.
Details of installation of the gauge of measurement of weight of air
The gauge makes measurement of weight of all air soaked up in the engine and on the basis of information ECM arriving from it defines quantity of the injected fuel, providing demanded structure of an air-fuel mix, and also optimum parametres of ignition.
Measurement of weight of air is made on technology of "a hot film”, based on efficiency of cooling of a sensitive element of gauge MAF. Gauge activation occurs at the moment of ignition inclusion at key turn in position ON.
The sensitive element of the gauge works as the thermosensitive resistor. ECM aspires to maintain temperature constantly of a sensitive element at demanded level. At обдуве heads of the gauge the sensitive element is cooled by air and ECM provides updating of force of a current passed through it. The internal contour of the gauge traces the given change and gives out a corresponding signal on ECM which on the basis of the analysis of the arriving information makes necessary updatings.
Removal and installation
The description of procedures of removal and gauge MAF installation is resulted in Section Removal and installation of the gauge of measurement of weight of air (MAF) Heads of the Power supply system and release.
The gauge of atmospheric pressure (model with АТ)
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The gauge of atmospheric value is used only on models with АТ. |
The general information and functioning principle
The gauge of atmospheric pressure is used on the models equipped with automatic transmission and fastens ahead of the top support of the right rack of a forward suspension bracket.
The gauge structure includes the electromagnetic valve switched between atmospheric and soaking up lines and actually by the gauge of pressure.
Signals developed by the gauge are used ECM at management of functioning of systems EGR and EVAP (Specifications see).
Removal and installation
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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1. Disconnect a negative wire from the battery.
2. Disconnect electroconducting from the gauge. |
| 3. Disconnect a hose from the pressure gauge. |
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| 4. Remove the gauge from a basic arm. |
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Installation is made upside-down.
Gauges of position cranked (CKP) and distributive (CMP) shaft
The general information and functioning principle
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1. On the basis of arriving from gauges CKP and CMP frequency signal ECM defines current position of pistons in engine cylinders.
2. Gauges have a similar principle of functioning and develop a signal continuously at the working engine. |
| 3. Gauge CKP is established under a cogwheel of a cranked shaft. Each time when the tooth of a wheel of a cranked shaft passes under sensitive element CKP, the gauge develops a small electric impulse. |
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| 4. Gauge CMP on a support of the left camshaft also develops an impulse each time at passage by its sensitive element of the special ledge provided on the back party of a cogwheel of a camshaft. |
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Principle of functioning of gauge CMP
Removal and installation
Gauge CKP
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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| 1. Disconnect a negative wire from the battery. |
| 2. Turn out a bolt of fastening of gauge CKP to the block of cylinders. |
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| 3. Remove the gauge and disconnect from it electroconducting. |
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| 4. Installation is made upside-down. Track, that the fixing bolt has been tightened with demanded effort (6.4 0.5 Nanometers). |
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Gauge CMP
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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| 1. Disconnect a negative wire from the battery. |
| 2. Disconnect electroconducting from gauge CMP. |
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| 3. Turn out a fixing bolt and remove gauge CMP from a support of the left camshaft. |
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| 4. Installation is made upside-down. Track, that the fixing bolt has been tightened with demanded effort (6.4 0.5 Nanometers). |
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The gauge of temperature of a cooling liquid of the engine (ECT)
The general information and functioning principle
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| 1. Gauge ECT is fixed on the pipe made of an aluminium alloy охладительного a path of the engine and is термистор which resistance changes in inverse proportion to temperature change. |
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| 2. On the basis of the analysis of information ECM arriving from the gauge exercises fuel administration in parametres of injection, supporting thereby efficiency of return of the engine on a maximum level. |
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Removal and installation
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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1. Disconnect a negative wire from the battery.
2. Release a collar of fastening of a sleeve of an air inlet to gauge MAF (air cleaner), also release a collar of fastening of a sleeve to the delivery chamber (see Has undressed the Regulator of pressure of fuel - the general data of the Head of the Power supply system and release).
3. Disconnect from an air inlet sleeve issue hoses.
4. Remove an air inlet (see Has undressed the Regulator of pressure of fuel - the general data of the Head of the Power supply system and release). |
| 5. Disconnect electroconducting from gauge ECT. |
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| 6. Turn out fixing bolts and take aside the electromagnetic valve of system of stabilisation of turns of idling (IAC), without disconnecting from it hoses охладительного a path. |
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| 7. Remove gauge ECT. |
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| 8. Installation is made upside-down. Track observance of requirements to effort of a tightening (25 3 Nanometers). |
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The converter противодавления systems recycling the fulfilled gases (EGR)
The general information and functioning principle
By means of the given converter the control of functioning of system EGR by restriction of depth of the depression caused противодавлением in system of release is carried out.
Removal and installation
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| 1. Disconnect from the converter противодавления vacuum hoses. |
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2. Remove the gauge from a basic arm.
3. Installation is made upside-down. |
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The pressure gauge in a fuel tank
Removal and installation of the gauge of pressure in a fuel tank
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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| 1. Disconnect a negative wire from the battery. |
| 2. Liberate fixing hook and shift forward a back of the right back lateral seat. |
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| 3. Uncover the top support of the right rack of a back suspension bracket. |
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| 4. Remove top sections of furnish of the right back window leaf. |
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| 5. Remove the right back floor pillow. |
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| 6. Remove the right back eye of fastening of luggage in a cargo compartment of the car. |
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| 7. Remove the right section of an overlay of a threshold of a door of a back. |
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| 8. Release clamps and separate from кузовного an element the bottom panel of furnish of a back window leaf. |
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| 9. Disconnect electroconducting from a back nest of a food. |
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| 10. Disconnect electroconducting from the pressure gauge in a fuel tank. |
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| 11. Turn out bolts of fastening of a basic arm of the gauge of pressure. |
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| 12. Disconnect from the gauge of pressure a hose. |
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13. Remove the gauge of pressure from a basic arm.
14. Installation is made upside-down. |
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The electromagnetic valve of management of pressure in a fuel tank
Removal and installation
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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1. Disconnect a negative wire from the battery.
2. Поддомкратьте the car also establish it on props. |
| 3. Disconnect from the electromagnetic valve of management of pressure of a line of tap of fuel evaporations. |
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| 4. Disconnect from the valve electroconducting. |
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| 5. Remove the valve from a basic arm. |
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Installation is made upside-down.
The electromagnetic valve of ventilation
Removal
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If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action! |
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1. Disconnect a negative wire from the battery.
2. Поддомкратьте the car also establish it on props. |
| 3. Remove a coal adsorber. |
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| 4. Disconnect two hoses from assemblage of the air filter. |
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| 5. Disconnect from the ventilating valve electroconducting. | | |
