Isc Valve - Mazda MX-5 1990 Workshop Manual

IDLE SPEED CONTROL (ISC) SYSTEM
F
05UOFX-124
Inspection
1. Cool the air valve to
OOC (31°F).
2. Mark the shaft. .
3. Warm the air valve with a hot air gun and verify that the shaft
moves in the direction of arrow.
4. Replace the air valve if necessary.
Installation
Note
• Install a new gasket.
Install in the reverse order of removal.
Tightening torque:
4.9-7.8 N·m (50-80 em-kg, 43-69 in-Ib)
ISC VALVE
Inspection
1. Disconnect the ISC valve connector.
2. Connect an ohmmeter between the terminals of the ISC
valve and measure the resistance.
Resistance (at 20°C [68°F]): 12
±
10
3. If not as specified, replace the ISC valve.
Replacement
1. Disconnect the ISC valve connector.
2. Remove the air pipe.
Note
• Before disconnecting the water hose, drain the en-
gine coolant.
3. Disconnect the water hose and the air hose.
4. Remove the ISC valve.
Note
• Install a new gasket.
5. Install in the reverse order of removal.
Tightening torque:
2.8-4.0 N·m (29-41 em-kg, 25-35 in-Ib)
F-99