Service of Nissan Sunny from 1991 to 1997 release in n-14 body.
1. Maintenance instruction
2. Maintenance
3. Engines
4. Cooling system
5. System of heating and ventilation
6. Fuel and exhaust system
6.1. Carburetor engines
6.2. Engines with system of injection of fuel
6.3. System of food / production of the fulfilled gases
6.4. System of decrease in toxicity of the fulfilled gases
6.4.1. Models with 1,4 and 1,6 liter engines
6.4.2. Models with 1,6 and 2,0 liter engines
6.4.2.1. System of decrease in emission of crankcase gases
6.4.2.2. Catalytic converter
6.4.2.3. The control system over release of vapors of fuel from fuel system
6.4.2.4. System of recirculation of exhaust gases
6.4.2.5. System of thermal neutralization
6.4.2.6. System of an admission of air in a final collector
6.4.2.7. System of decrease in toxicity of exhausts
6.4.2.7.1. System of decrease in toxicity of exhausts (idling mode)
6.4.2.7.2. Damper of a butterfly valve
7. System of launch of the engine
8. Coupling
9. Transmissions
10. Half shafts
11. Brakes
12. Suspension brackets and steering
13. Body
14. Electric equipment
 



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6.4.2.7. System of decrease in toxicity of exhausts

MODELS WITH THE CARBURETTOR ENGINE

Check
PERFORMANCE ORDER
1. Adjust composition of fuel mix for the idling mode (SO level) (see subsection 2.2.2).
2. Uncover the block of safety locks for receiving access to diagnostics socket which is installed from below the block of safety locks.
3. Establish a tester on measurement tension and connect its probes to the control socket of the block of safety locks as it is shown in the drawing.
4. Start the engine, lift the speed of operation of the engine approximately to 2000 rpm and hold it at such level approximately within 2 minutes, watching a tester scale. If the sensor of exhaust gases works correctly, then indications of a tester have to change from 0 Volts to about 12 Volts of at least 5 times each 10 seconds. If is not present probably the sensor is faulty. For conducting more detailed check of the sensor and the catalytic converter address experts.

MODELS WITH FUEL INJECTION

Check

If the SO level in exhaust gases too high, operation of the sensor of exhaust gases it is necessary to check, having included an engine electronic control unit in the self-diagnostics mode (see subsection 6.2.11).

For conducting more detailed check of the sensor and the catalytic converter address experts.

SENSOR OF EXHAUST GASES
Prevention

The sensor of exhaust gases is very fragile and will fail if to strike it or to drop if during its work to power off, or at hit on it any cleaners.

Replacement

PERFORMANCE ORDER
1. On models with the 1,6 liters engine, walk along wires from the sensor of exhaust gases which is twisted in a final collector. Disconnect the socket of connection and get wires from all fixing clips.
2. On models with the 2,0 liters engine put the car on the emergency brake, lift a forward part of the car and establish it on support. Walk along wires from the sensor of exhaust gases (which is twisted in a reception pipe), getting wires from all fixing clips.
3. Disconnect the connection socket.
4. Unscrew the sensor and remove it together with a sealing washer.
5. Installation is carried out upside-down removals. At installation use a new sealing washer. Before installation of the sensor grease a sensor carving with high-temperature lubricant. Reliably twirl the sensor. Check that wires were correctly laid and did not concern pipes of the exhaust system or engine.

6.4.2.6.2. Air admission valve
6.4.2.7.1. System of decrease in toxicity of exhausts (idling mode)