Mazda 626

1991-1998 of release

Repair and operation of the car



Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Heating and ventilation
+ 5. Fuel system
- 6. Exhaust system
   + 6.1. Exhaust system
   - 6.2. Systems of decrease in toxicity of exhausts and management of operation of the engine
      6.2.1. Introduction
      6.2.2. System of self-diagnostics and codes of malfunction
      6.2.3. Central control unit
      6.2.4. Sensor of provision of a butterfly valve
      6.2.5. Air stream sensor
      6.2.6. The sensor of temperature of the arriving air
      6.2.7. Sensor of temperature of cooling liquid
      6.2.8. Sensor of provision of a bent shaft
      6.2.9. Sensor of position of the camshaft
      6.2.10. Switch of system of hydrostrengthening of steering
      6.2.11. Oxygen sensor
      6.2.12. Sensor of detonation combustion of fuel
      6.2.13. Speed sensor
      6.2.14. Air valve
      6.2.15. System of additional air supply on low turns
      6.2.16. System of ventilation of a case
      6.2.17. System of recirculation of exhaust gases
      6.2.18. System of collecting vapors of fuel
      6.2.19. Switch of fires of a stoplight
      6.2.20. Catalytic converter
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electrical circuitries
+ 14. Useful tips


6.2.2. System of self-diagnostics and codes of malfunction

GENERAL INFORMATION

Control and measuring equipment

For check of systems of injection of fuel and decrease in toxicity of exhausts it is necessary to use digital universal instrumentations as they have the big accuracy of measurements and bigger resistance of an internal contour.

Hand scanners are the most convenient and universal devices for check of control systems of operation of the engine on models of later years of release.

The OBD-I systems (models till 1995 of release)

The electronic control unit has the built-in system of self-diagnostics (On Board Diagnosis (OBD) system) which serves for search of malfunctions in system and includes a control bulb of the engine on an instrument guard in case of detection of malfunctions. The code of malfunction remains in memory of an electronic control unit and is available to reading.

Reading of codes of malfunction of the OBD-I systems

For reading of the codes of malfunction which are written down in memory of an electronic control unit connect the STI and GND plugs of the diagnostic socket of connection.

Connect the voltmeter to the car STO and "weight" plug. Include ignition and count number of a deviation of an arrow of the device or blinkings of a control bulb of the engine. For example, the code 34 will be removed as 3 long blinkings of a bulb, a pause, 4 short blinkings.

Cleaning of codes of malfunction of the OBD-I system

For cleaning of codes of malfunction disconnect a wire of the minus plug of the accumulator and squeeze out a brake pedal longer, than for 5 seconds.

Codes of malfunction of the OBD-I systems (model 1993-1995 of years of release, except models 1994 and 1995 of years of release with the 4-cylinder engine and the automatic transmission)

MALFUNCTION CODE
FAULTY ELEMENT OR SYSTEM
02
Sensor of provision of a bent shaft
03
Sensor of position of the camshaft
08
Air stream sensor
09
Sensor of temperature of cooling liquid
11
Air temperature sensor
12
Sensor of provision of a butterfly valve
15
Oxygen sensor
16
Sensor of the valve of recirculation of exhaust gases
17
The oxygen sensor (check a power supply system and ignitions)
25
Fuel pressure valve
26
Blowing-off valve
28
Valve of recirculation of exhaust gases
29
Ventilating valve of system of recirculation of exhaust gases
34
Air valve of system of idling
67
Cooling fan relay

Codes of malfunction of the OBD-I systems (models 1994 and 1995 of years of release with the 4-cylinder engine and the automatic transmission)

MALFUNCTION CODE
FAULTY ELEMENT OR SYSTEM
111
Lack of codes of malfunction
112, 113
Air temperature sensor
116, 117, 118
Sensor of temperature of cooling liquid
121, 122, 123
Sensor of provision of a butterfly valve
157, 158, 159
Air stream sensor
172, 173, 179, 181
Oxygen sensor
211, 212, 213
System of ignition
214, 244
Sensor of position of the camshaft
327, 332, 337
Sensor of system of recirculation of exhaust gases
411, 412
Air valve of system of idling
452
Speed sensor
511, 512, 513
Central control unit
519, 521
Switch of system of hydrostrengthening of steering
522
Sensor of the automatic transmission
536
Switch of fires of a stoplight
538
Dynamic test
539
Conditioner sensor
554
Valve of adjustment of pressure
559
Conditioner relay
563
Relay (high speed) of the cooling fan
564
Relay (low speed) of the cooling fan
565
Blowing-off valve
571
Ventilating valve of recirculation of exhaust gases
572
Vacuum valve of system of recirculation of exhaust gases
998
Central control unit

The OBD-II systems (models since 1996 of release)

Diagnostic socket of connection of the OBD-II system

The socket is located under the dashboard on the party of the driver.

Models since 1996 of release have system of self-diagnostics of the second generation OBD-II. Access to an electronic control unit of this system can be got only by means of the special scanner which needs to be connected to the 16-shtyrkovy diagnostic socket of connection located under the dashboard. At failure detection the electronic control unit includes an alarm bulb on an instrument guard and keeps a malfunction code in memory.

Reading of codes of malfunction of the OBD-II system

For reading of codes of malfunction of the OBD-II system use the special scanner which needs to be connected to the diagnostic socket of connection. If there is no scanner, it is necessary to address experts.

Cleaning of codes of malfunction of the OBD-II system

For cleaning of codes of malfunction of the OBD-II system it is necessary to use the special scanner.

Codes of malfunction of the OBD-II system

MALFUNCTION CODE
FAULTY ELEMENT OR SYSTEM
P0100, P0102, P0103
Air stream sensor
P0110, P0112, P0113
Air temperature sensor
P0115, P0117, P0118
Sensor of temperature of cooling liquid
P0120, P0122, P0123
Sensor of provision of a butterfly valve
P0125
Transition to the closed operating mode requires too much time
P0130, P0131, P0150
Oxygen sensor
P0133, P0134, P0140
Slow reaction of the oxygen sensor
P0154, P0160
Slow reaction of the oxygen sensor
P0135, P0141, P0155
Heating element of the oxygen sensor
P0170, P0171
Poor fuel mix
P0172, P0173
The oversaturated fuel mix
P0230, P0231, P0232
Fuel pump
P0300
Casual admission of ignition
P0301
The admission of ignition in the N1 cylinder
P0302
The admission of ignition in the N2 cylinder
P0303
The admission of ignition in the N3 cylinder
P0304
The admission of ignition in the N4 cylinder
P0305
The admission of ignition in the N5 cylinder
P0306
The admission of ignition in the N6 cylinder
P0320
System of ignition
P0335
Sensor of provision of a bent shaft
P0340
Sensor of position of the camshaft
P0400
The system of recirculation of exhaust gases is littered
P0420, P0430
Catalytic converter
P0440
System of collecting vapors of fuel
P0443
Blowing-off valve
P0500, P0503
Speed sensor
P0505
Air valve of system of idling
P0510
Switch of system of idling
P0552, P0553
Switch of system of hydrostrengthening of steering
P0603
RAM error
P0605
ROM error
P0703
Switch of fires of a stoplight
P0704
The switch on a coupling pedal
P0705
Transmission sensor
P0710-P0760
Control system of the transmission



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