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