Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1996 Mazda B3000 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Idle Air Control (IAC) Solenoid
- Connect New Generation Star (NGS) Tool (49 T088 0A0) to data link connector 2 located under left side of dash. Turn ignition on. Using NSG tool, access IAC PID and record value while operating vehicle under specified condition. See IDLE AIR CONTROL (IAC) SOLENOID VOLTAGE table. If IAC PID value is not as specified, go to next step.
- Turn ignition off. Disconnect IAC solenoid connector. Using ohmmeter, measure resistance between IAC solenoid terminals. A diode is located in solenoid; connect ohmmeter positive test lead to VPWR terminal (Red wire) and negative lead to IAC SIG terminal (White/Light Blue wire). Resistance should be 6-13 ohms at 68°F (20°C). If resistance is not as specified, replace IAC solenoid.
IDLE AIR CONTROL (IAC) SOLENOID VOLTAGE
| Condition | Volts | % Duty Cycle | ||
|---|---|---|---|---|
| B2300 | ||||
| Ign On/Eng Off | VBAT | 0 | ||
| Hot Idle | 11.5-VBAT | 28-32 | ||
| 30-55 MPH | 10.1-10.9 | 30-55 | ||
| 55-65 MPH | 8.7-10.1 | 60-65 | ||
| B3000 | ||||
| Ign On/Eng Off | VBAT | 0 | ||
| Hot Idle | 11.6-VBAT | 28-32 | ||
| 30-55 MPH | 7.6-10 | 30-55 | ||
| 55-65 MPH | 7.9-8.6 | 60-65 | ||
| B4000 | ||||
| A/T | ||||
| Ign On/Eng Off | VBAT | 0 | ||
| Hot Idle | 11-11.7 | 28-32 | ||
| 30-55 MPH | 7.6-10 | 30-55 | ||
| 55-65 MPH | 9.1-10.4 | 38-47 | ||
| M/T | ||||
| Ign On/Eng Off | VBAT | 0 | ||
| Hot Idle | 11-11.7 | 28-32 | ||
| 30-55 MPH | 7.6-10 | 30-55 | ||
| 55-65 MPH | 9.1-10.4 | 42-55 | ||
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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