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Home >> Mazda >> 1993 >> MX-3 L4-1597cc 1.6L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Idle Speed/Throttle Actuator - Electronic >> Testing and Inspection
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Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

AIR VALVE

1. Connect jumper wire between diagnosis connector TEN and GND terminals.
2. Connect a tachometer.
3. Start engine.
4. Idle speed should gradually decrease as engine warms up and air valve closes.

IDLE SPEED CONTROL (ISC) VALVE

Idle Speed Control (ISC) Valve Testing:






1. Unplug ISC valve connector.
2. Measure resistance across terminals. It should be 10.7 - 12.3 ohms @ 68°F (20°C).
3. If not as specified, replace valve.
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