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 | ||