Subaru Legacy

Since 1990-1998 of release

Repair and car operation

6.2.2. Self-diagnostics system (OBD) and codes

THE GENERAL DATA

The digital voltmeter

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

The scanner

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

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The prevention

On models with 1990 till 1994 the system of self-diagnostics OBD1, and since 1995 – system of self-diagnostics OBD2 is established.

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

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

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

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

The U-way is user-friendliest.

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

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

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

PERFORMANCE ORDER

1. Check up that the verifying socket of a way of malfunction is separated. 2. Include ignition, without starting the engine and check up that the lamp "check engine" on a combination of devices burns. 3. Observe of a bulb "check engine" which will highlight the codes of the malfunction which have been written down in memory of the computer. In the absence of codes of malfunction the lamp "check engine" will not burn. If the lamp "check engine" flickers, it means that the test socket of a way of malfunction is not separated. 4. Observing of a lamp "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 represents figure 2, that is a code of malfunction 42.

Malfunction codes	Electric chain or system	Plausible reason
Code 11 (one long flash, one short flash)	The gauge or electric chain of an angle of rotation of a cranked shaft	There is no reason
Code 12 (one long flash, two short flashes)	The starter switch	The starter switch remains constantly included or switched off
Code 13 (one long Three short flash)	The gauge of an angle of rotation of a camshaft	There is no reason
Code 14 (one long flash, four short flashes).	Fuel atomizer 1	Indistinct work of a fuel atomizer
Code 15 (one long flash, five short flashes).	Fuel atomizer 2	Indistinct work of a fuel atomizer
Code 16 (one long flash, six short flashes)	Fuel atomizer 3	Indistinct work of a fuel atomizer
Code 17 (one long flash, seven short flashes)	Fuel atomizer 4	Indistinct work of a fuel atomizer
Code 21 (two long flashes, one short flash)	The gauge of temperature of a cooling liquid	The gauge or electric chain of the gauge work with failures
Code 22 (two long flashes, two short flashes)	The detonation gauge	The electric chain of the gauge is torn off or closed
Code 23 (two long flashes, three short flashes)	The gauge of a stream of air	The electric chain of the gauge is torn off or closed
Code 24 (two long flashes, four short flashes)	The air regulating valve	The electric chain of the valve is torn off or closed
Code 31 (three long flashes, one short flash)	The gauge of position throttle заслонки	The electric chain of the gauge is torn off or closed
Code 32 (three long flashes, two short flash)	The oxygen gauge	The electric chain of the gauge of oxygen is torn off
Code 33 (three long flashes, three short flashes)	The gauge of speed of the car	There is no signal of the gauge of speed of the car
Code 35 (three long flashes, five short flashes)	The electromagnetic valve of clearing	The electromagnetic valve of clearing is constantly included or switched constantly off
Code 41 (four long flashes, one short flash)	Structure of a fuel mix	Not an optimum parity of a fuel mix
Code 42 (four long flashes, two short flash)	Switching signal	Wrong signal of switching
Code 44 (four long flashes, four short flashes)	The executive mechanism заслонки	The valve of the executive mechanism заслонки is faulty
Code 45 (four long flashes, five short flashes)	The atmospheric gauge	The atmospheric gauge is faulty
Code 49 (four long flashes, nine short flashes)	The gauge of a stream of air	The gauge of a stream of air is faulty
Code 51 (five long flashes, one short flash).	The neutral switch	The neutral switch remains in constantly included position
Code 51 (five long flashes, one short flash)	Блокиратор a starter	The blocking switch remains constantly in the included position
Code 52 (five long flashes, two short flashes)	The dimensional switch	The parking switch remains in constantly included position

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

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

Codes of malfunction of system of self-diagnostics OBD2

Code	Malfunction
R0100	The electric chain or the gauge of a stream of air (MAF) is faulty
R0101	The wrong indication of the gauge of a stream of air (MAF)
R0102	Low voltage of the gauge of a stream of air (MAF)
R0103	High voltage of the gauge of a stream of air (MAF)
R0105	The electric chain or the pressure gauge is faulty
R0106	The inexact indication of the gauge of pressure
R0107	Low voltage of the gauge of pressure
R0108	High voltage of the gauge of pressure
R0115	The electric chain or the gauge is faulty
R0116	The low signal from the gauge of temperature of a cooling liquid (EATS)
R0117	The high signal from the gauge of temperature of a cooling liquid (EATS)
R0120	Malfunction of an electric chain or the gauge of position throttle заслонки (TPS)
R0121	The wrong indication of the gauge of position throttle заслонки (TPS)
R0122	Low signal from the gauge of position throttle заслонки (TPS)
R0123	High signal from the gauge of position throttle заслонки (TPS)
R0125	Low temperature of a cooling liquid
R0130	The electric chain or the oxygen gauge is faulty
R0133	The slowed down signal from the oxygen gauge
R0135	Malfunction of an electric chain of a heater of the gauge of oxygen
R0136	Malfunction of an electric chain of the bottom gauge of oxygen
R0139	The slowed down signal from the bottom gauge of oxygen
R0141	Malfunction of an electric chain of a heater of the bottom gauge of oxygen
R0170	Not optimum parity fuel mixes
R0181	The wrong indication of the gauge of temperature
R0182	Low signal from the temperature gauge
R0183	High signal from the temperature gauge
R0201	The fuel atomizer 1 is faulty
R0202	The fuel atomizer 2 is faulty
R0203	The fuel atomizer 3 is faulty
R0204	The fuel atomizer 4 is faulty
R0261	Low signal in an electric chain of a fuel atomizer 1
R0262	High signal in an electric chain of a fuel atomizer 1
R0264	Low signal of an electric chain of a fuel atomizer 2
R0265	High signal of an electric chain of a fuel atomizer 2
R0267	Low signal of an electric chain of a fuel atomizer 3
R0268	High signal of an electric chain of a fuel atomizer 3
R0270	Low signal of an electric chain of a fuel atomizer 4
R0271	High signal of an electric chain of a fuel atomizer 4
R0301	Admissions of ignition of the cylinder № 1 are found out
R0302	Admissions of ignition of the cylinder № 2 are found out
R0303	Admissions of ignition of the cylinder № 4 are found out
R0304	Admissions of ignition of the cylinder № 4 are found out
R0325	Malfunction of an electric chain of the gauge of a detonation
R0335	Malfunction of an electric chain of the gauge of an angle of rotation of a cranked shaft
R0336	The deformed signal of the gauge of an angle of rotation of a cranked shaft
R0340	The electric chain of the gauge of position of a camshaft is faulty
R0341	The deformed signal of the gauge of position of distribution of a camshaft
R0400	Malfunction of system of repeated burning of the fulfilled gases (EGR)
R0403	Malfunction of an electric chain of system of repeated burning of the fulfilled gases (EGR)
R0420	Low efficiency of the catalyst
R0440	Malfunction in system of catching of steams of fuel (EVAP)
R0441	Malfunction in system of clearing of catching of steams of fuel (EVAP)
R0443	Malfunction of an electric chain or the regulating valve of clearing of system EVAR
R0446	Malfunction of the gate of system EVAP
R0451	Wrong signal of the gauge of pressure of a fuel tank of system EVAP
R0452	Low signal of the gauge of pressure of a fuel tank of system EVAP
R0453	High signal of the gauge of pressure of a fuel tank of system EVAP
R0461	Wrong signal of the gauge of level of fuel
R0462	Low signal in a chain of the gauge of level of fuel
R0463	High signal in a chain of the gauge of level of fuel
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 block of management
R0703	Malfunction of the switch of stoplights
R0705	Malfunction of an electric chain or the gauge of the included transfer
R0710	Malfunction of an electric chain or the gauge of temperature of oil in a transmission
R0720	Malfunction of an electric chain of system VSS
R0725	Malfunction in an electric chain of turns of the engine
R0731 – R0734	The wrong transfer relation
R0740 And R0743	Malfunction of the hydrotransformer
R0748 – R0763	Malfunction of the electromagnetic valve