Subaru Legacy

since 1990-1998 release

Repair and operation of the car



Subaru of Legasi
+ 1.1. Identification numbers
+ 2. Maintenance
+ 3. Engines
+ 4. Heating, ventilation
+ 5. Fuel system
- 6. Exhaust system
   6.1. Service of final system
   - 6.2. Reduction of toxicity of exhaust gases and management of operation of the engine
      6.2.1. Technical characteristics
      6.2.2. System of self-diagnostics (OBD) and codes
      6.2.3. Block of electronic control (ECM)
      6.2.4. Sensor of temperature of cooling liquid
      6.2.5. Sensor of provision of a butterfly valve
      6.2.6. Sensors of a cranked shaft, camshaft, car speed
      6.2.7. Oxygen sensor
      6.2.8. Air stream sensor
      6.2.9. Detonation sensor
      6.2.10. Pressure sensor in an inlet collector
      6.2.11. Replacement of the sensor of temperature of cooling liquid
      6.2.12. Replacement of the sensor of a stream of air
      6.2.13. Replacement of the sensor of oxygen
      6.2.14. Replacement of the sensor of provision of a butterfly valve
      6.2.15. Replacement of the sensor of an angle of rotation of a cranked shaft
      6.2.16. Replacement of the sensor of provision of a camshaft
      6.2.17. Replacement of the sensor of a detonation
      6.2.18. Replacement of the sensor of speed of the car
      6.2.19. Replacement of the sensor of pressure
      6.2.20. System of repeated burning of exhaust gases (EGR)
      6.2.21. System of catching of vapors of fuel (EVAP)
      6.2.22. System of compulsory ventilation of a case (PCV)
      6.2.23. Catalyst
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. Suspension bracket
+ 12. Steering
+ 13. Body
+ 14. Electric equipment


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6.2.2. System of self-diagnostics (OBD) and codes

GENERAL INFORMATION

Digital voltmeter

The digital voltmeter is used for diagnostics of system of reduction of toxicity of exhaust gases and management of operation of the engine.

Scanner

The scanner is used for definition of codes of malfunction and the analysis of control systems of the engine.

Prevention

On models from 1990 to 1994 the system of self-diagnostics of OBD1, and since 1995 – system of self-diagnostics of OBD2 is installed.


For definition of codes of malfunction in OBD1 system it is necessary to disunite simply the test socket located under the dashboard. But definition of codes of malfunctions in OBD2 system requires use of the special device for viewing of codes of malfunctions. For carrying out diagnostics of system of reduction of toxicity of exhaust gases and management of operation of the engine it is desirable to use the digital voltmeter which has high entrance resistance and does not influence work of the checked chain (see rice. Digital voltmeter).

For definition of codes of malfunctions and the analysis of control systems of the engine it is necessary to use special scanners (see rice. Scanner).

The ECM block contains the built-in system of self-diagnostics which finds and classifies malfunctions in electric chains. When the ECM module finds malfunction, the control lamp of "check engine" lights up, malfunction is identified, and the code of malfunction registers in memory and remains in it.

There are four ways of self-diagnostics of malfunction of the engine. The control lamp of "check engine" lights up if there is a malfunction in U-way.

The U-way is user-friendliest.

Way of reading memory. It is intended for department of maintenance for check of the reserved codes of malfunctions.

D-way. It is used for check of faulty parts.

Way of cleaning. It is intended for removal of the written-down malfunction codes.

PERFORMANCE ORDER
1. Check that the test socket of a way of malfunction is disconnected.
2. Include ignition, without starting the engine and check that the lamp of "check engine" on a combination of devices burns.
3. Watch a bulb of "check engine" which will highlight the malfunction codes which are written down in memory of the computer. In the absence of malfunction codes the lamp of "check engine" will not burn. If the lamp of "check engine" flickers, it means that the test socket of a way of malfunction is not disconnected.
4. Watching a lamp of "check engine", define malfunction codes. The first figure of a code of malfunction is highlighted by long flashes, and the second figure of a code of malfunction is highlighted by short flashes. For example, 4 long flashes represent figure 4, and two short flashes represent figure 2, that is a code of malfunction 42.

Malfunction codes
Electric chain or system
Probable cause
Code 11 (one long flash, one short flash) Sensor or electric chain of an angle of rotation of a cranked shaft There is no reason
Code 12 (one long flash, two short flashes) Starter switch The switch of a starter remains constantly included or switched off
Code 13 (one long
three short flash)
Sensor of an angle of rotation of a camshaft There is no reason
Code 14 (one long flash, four short flashes). Fuel nozzle 1 Indistinct work of a fuel nozzle
Code 15 (one long flash, five short flashes). Fuel nozzle 2 Indistinct work of a fuel nozzle
Code 16 (one long flash, six short flashes) Fuel nozzle 3 Indistinct work of a fuel nozzle
Code 17 (one long flash, seven short flashes) Fuel nozzle 4 Indistinct work of a fuel nozzle
Code 21 (two long flashes, one short flash)
Sensor of temperature of cooling liquid The sensor or electric chain of the sensor work with failures
Code 22 (two long flashes, two short flashes) Detonation sensor The electric chain of the sensor is torn off or closed
Code 23 (two long flashes, three short flashes) Air stream sensor The electric chain of the sensor is torn off or closed
Code 24 (two long flashes, four short flashes) Air adjusting valve The electric chain of the valve is torn off or closed
Code 31 (three long flashes, one short flash) Sensor of provision of a butterfly valve The electric chain of the sensor is torn off or closed
Code 32 (three long flashes, two short flash) Oxygen sensor The electric chain of the sensor of oxygen is torn off
Code 33 (three long flashes, three short flashes) Car speed sensor There is no car speed sensor signal
Code 35 (three long flashes, five short flashes) Electromagnetic valve of cleaning The electromagnetic valve of cleaning is constantly included or switched constantly off
Code 41 (four long flashes, one short flash) Composition of fuel mix Not optimum ratio of fuel mix
Code 42 (four long flashes, two short flash) Switching signal Wrong signal of switching
Code 44 (four long flashes, four short flashes) Executive mechanism of the gate The valve of the executive mechanism of the gate is faulty
Code 45 (four long flashes, five short flashes) Atmospheric sensor The atmospheric sensor is faulty
Code 49 (four long flashes, nine short flashes) Air stream sensor The air stream sensor is faulty
Code 51 (five long flashes, one short flash). Neutral switch The neutral switch remains in constantly included situation
Code 51 (five long flashes, one short flash) Starter lock The switch of blocking remains constantly in the included situation
Code 52 (five long flashes, two short flashes) Dimensional switch The switch of a parking remains in constantly included situation

For definition of codes of malfunction in system of self-diagnostics of OBD2 it is necessary to turn on the scanner in the diagnostic 16-contact socket.

Malfunction codes in system of self-diagnostics of OBD2 consist of five figures.

Codes of malfunction of system of self-diagnostics of OBD2

Code
Malfunction
R0100
the electric chain or the sensor of a stream of air (MAF) is faulty
R0101
wrong indication of the sensor of a stream of air (MAF)
R0102
low voltage of the sensor of a stream of air (MAF)
R0103
high voltage of the sensor of a stream of air (MAF)
R0105
the electric chain or the sensor of pressure is faulty
R0106
inexact indication of the sensor of pressure
R0107
low voltage of the sensor of pressure
R0108
high voltage of the sensor of pressure
R0115
the electric chain or the sensor is faulty
R0116
the low signal from the sensor of temperature of cooling liquid (eats)
R0117
the high signal from the sensor of temperature of cooling liquid (eats)
R0120
malfunction of an electric chain or sensor of provision of a butterfly valve (TPS)
R0121
wrong indication of the sensor of provision of a butterfly valve (TPS)
R0122
low signal from the sensor of provision of a butterfly valve (TPS)
R0123
high signal from the sensor of provision of a butterfly valve (TPS)
R0125
low temperature of cooling liquid
R0130
the electric chain or the sensor of oxygen is faulty
R0133
the slowed-down signal from the oxygen sensor
R0135
malfunction of an electric chain of a heater of the sensor of oxygen
R0136
malfunction of an electric chain of the lower sensor of oxygen
R0139
the slowed-down signal from the lower sensor of oxygen
R0141
malfunction of an electric chain of a heater of the lower sensor of oxygen
R0170
non-optimal ratio fuel mixes
R0181
wrong indication of the sensor of temperature
R0182
low signal from temperature sensor
R0183
high signal from temperature sensor
R0201
the fuel nozzle 1 is faulty
R0202
the fuel nozzle 2 is faulty
R0203
the fuel nozzle 3 is faulty
R0204
the fuel nozzle 4 is faulty
R0261
low signal in an electric chain of a fuel nozzle 1
R0262
high signal in an electric chain of a fuel nozzle 1
R0264
low signal of an electric chain of a fuel nozzle 2
R0265
high signal of an electric chain of a fuel nozzle 2
R0267
low signal of an electric chain of a fuel nozzle 3
R0268
high signal of an electric chain of a fuel nozzle 3
R0270
low signal of an electric chain of a fuel nozzle 4
R0271
high signal of an electric chain of a fuel nozzle 4
R0301
admissions of ignition of the cylinder No. 1 are found
R0302
admissions of ignition of the cylinder No. 2 are found
R0303
admissions of ignition of the cylinder No. 4 are found
R0304
admissions of ignition of the cylinder No. 4 are found
R0325
malfunction of an electric chain of the sensor of a detonation
R0335
malfunction of an electric chain of the sensor of an angle of rotation of a cranked shaft
R0336
the distorted signal of the sensor of an angle of rotation of a cranked shaft
R0340
the electric chain of the sensor of provision of a camshaft is faulty
R0341
the distorted signal of the sensor of provision of distribution of a camshaft
R0400
malfunction of system of repeated burning of exhaust gases (EGR)
R0403
malfunction of an electric chain of system of repeated burning of exhaust gases (EGR)
R0420
low efficiency of the catalyst
R0440
malfunction in system of catching of vapors of fuel (EVAP)
R0441
malfunction in system of cleaning of catching of vapors of fuel (EVAP)
R0443
malfunction of an electric chain or adjusting valve of cleaning of EVAP system
R0446
malfunction of the gate of EVAP system
R0451
wrong signal of the sensor of pressure of a fuel tank of EVAP system
R0452
low signal of the sensor of pressure of a fuel tank of EVAP system
R0453
high signal of the sensor of pressure of a fuel tank of EVAP system
R0461
wrong signal of the fuel level sensor
R0462
low signal in a chain of the fuel level sensor
R0463
high signal in a chain of the fuel level sensor
R0500
malfunction of an electric chain or VSS
R0505
malfunction in system of the control air valve (IAC)
R0506
too low turns of idling
R0507
too high turns of idling
R0600
malfunction of communication lines
R0601
internal error of memory of the control unit
R0703
malfunction of the switch of stoplights
R0705
malfunction of an electric chain or the sensor of the included transfer
R0710
malfunction of an electric chain or the sensor of temperature of oil in a transmission
R0720
malfunction of an electric chain of VSS system
R0725
malfunction in an electric chain of turns of the engine
R0731 – R0734
wrong transfer relation
R0740 and R0743
malfunction of the hydrotransformer
R0748 – R0763
malfunction of the electromagnetic valve