Idle Air Control Valve-Fast Idle Control Device (IACV-FICD) System Test
- Start engine and warm to normal operating temperature. Check idle speed. See SERVICE & ADJUSTMENT SPECIFICATIONS article. Adjust, if necessary. Turn A/C and blower on. If idle speed increases by 50 RPM or more, system is okay. If idle speed does not increase by 50 RPM or more, go to next step.
- Check A/C compressor operation. Repair A/C system, if necessary. If A/C compressor operation is okay, check IACV-FICD power and ground circuits. See appropriate diagram in WIRING DIAGRAMS article. Repair as necessary. If circuits are okay, go to next step.
- Check ambient air temperature sensor (if equipped). See appropriate AUTOMATIC A/C-HEATER SYSTEMS article. Replace, if necessary. If ambient air temperature sensor is okay, go to next step.
- Check IACV-FICD solenoid. See IACV-FICD SOLENOID . Replace, if necessary. If IACV-FICD solenoid is okay, no problem is indicated at this time. Problem may be intermittent. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article.