Idle Speed Control System — checking and adjusting (Mazda Capella GC)

1. Cold mode stabilization system. the power steering system used on some models increases engine speed to compensate for the load placed on the engine by the air conditioning and/or power steering. The system consists of amplifier diaphragms (which differ according to whether the vehicle has air conditioning and power steering or air conditioning only) and a triple solenoid valve. Sign of damage in the cold mode stabilization system. the running mode is the engine stopping at low speed when the air conditioner and/or power steering is engaged.

Amplifier diaphragm

2. Remove the air filter assembly.

3. Turn off all additional equipment and disconnect the electric fan.

4. Disconnect and plug the cold compensator hoses. stroke, valves and temperature sensor.

5. Warm up the engine to normal operating temperature and connect the tachometer.

Models with air conditioning

6. Disconnect the vacuum pipe (B in the accompanying illustration).





7. Apply vacuum from the manifold to the booster diaphragm and ensure that the idle frequency is correct. the engine speed has increased to 1200-1400 rpm. If this increase does not occur, turn the adjusting screw to adjust it.



Based on website data: MazBook.ru

Models equipped with power steering

8. Follow steps 2-4. On models with air conditioning, also check and adjust the amplifier diaphragm.

9. Connect the vacuum line (A in the accompanying diagram) and apply vacuum from the manifold to the booster diaphragm.



10. Engine speed should increase to 800-1000 rpm on models with manual transmission and to 1050-1250 rpm on models with automatic transmission. If the increase in RPM is not as good, disconnect the vacuum pipe and turn the adjusting screw on the diaphragm to adjust.





11. Reconnect the vacuum line and recheck the engine speed.

Triple solenoid valve

12. The triple solenoid valve is installed between the intake manifold and the booster diaphragm. On models with air conditioning, a triple solenoid valve limits vacuum flow according to a signal sent through the control unit from the air conditioning switch. A triple solenoid valve on models with power steering limits vacuum flow according to a signal from the power steering switch.



13. In idle mode, turn on the air conditioner and check that the booster diaphragm and triple solenoid valve are working properly.



14. Turn off the air conditioner and turn the steering wheel to the maximum right or left angle and check that the power steering diaphragm and triple solenoid valve are working properly.

Power steering switch

15. Disconnect the power steering switch connector and check for continuity as shown in the accompanying illustration. In idle mode, turn the steering wheel to the maximum angle to the right or left to ensure there is no break.