Idle Air Control Valve-Fast Idle Control Device System Test: Quest

1. Start engine and warm to normal operating temperature. Check idle speed. Idle speed should be 700-800 RPM with transmission in Park or Neutral. If idle speed is as specified, go to next step. If idle speed is not as specified, adjust idle speed. See ON-VEHICLE ADJUSTMENTS article.
2. Turn A/C and blower on, then recheck idle speed. Idle speed should now be 800 RPM or more. If idle speed is as specified, go to next step. If idle speed is not as specified, check if A/C compressor functions normally. If A/C compressor functions normally, go to next step. If A/C compressor does not function normally, repair A/C system as necessary. See appropriate article in AIR CONDITIONING & HEATING.
3. Turn ignition off. Disconnect Idle Air Control Valve-Fast Idle Control Device (IACV-FICD) solenoid valve harness connector. See Fig 1. Start engine. Turn A/C and blower on. Measure voltage between ground and IACV-FICD solenoid valve harness connector terminal No. 3 (Gray/Red wire). See Fig 2. If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short circuit. See appropriate article in WIRING DIAGRAMS.
4. Turn ignition off. Check continuity between ground and IACV-FICD solenoid valve harness connector terminal No. 4 (Black wire). Continuity should exist. Also, check circuit for short to voltage. Repair circuit as necessary. If circuit is okay, go to next step.
5. Check IACV-FICD solenoid valve. See IDLE AIR CONTROL VALVE-FAST IDLE CONTROL DEVICE SOLENOID VALVE . Replace IACV-FICD solenoid valve, if necessary. If IACV-FICD solenoid valve is okay, go to next step.
6. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

Fig 1: Locating IACV-FICD Solenoid Valve Harness Connector (Quest)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Identifying IACV-AAC Valve & IACV-FICD Harness Connector Terminals (Quest)

Courtesy of NISSAN MOTOR CO., U.S.A.