Idle Air Control (IAC) Solenoid
WARNING: This page is about a different car, the 1995 Mazda B4000, 1995 Mazda B3000, and 1995 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Disconnect IAC solenoid electrical connector. Set DVOM to 200-ohm scale. Measure resistance between IAC solenoid terminals. A diode is located in solenoid; connect DVOM positive test lead to VPWR terminal (Red wire) and negative lead to IAC terminal (White/Light Blue wire). Resistance should be 6-13 ohms. If resistance is not as specified, replace solenoid. If resistance is okay, go to next step.
- Restore electrical connections. Using New Generation Star scan tester, access IAC PID. Check PID values while driving vehicle. See IAC PID VALUES table.
IAC PID VALUES
| Condition | Volts | % Duty Cycle |
|---|---|---|
| Key On | VBAT | 0 |
| Hot Idle | 11.5 | 28-32 |
| 30-55 MPH | 10.1-10.9 | 30-55 |
| 55-65 MPH | 8.7-10.1 | 60-65 |