Frontier & Xterra
- Start engine and warm to normal operating temperature. Check idle speed. Idle speed should be 750-850 RPM (on 2.4L) or 700-800 RPM (on 3.3L) 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 IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT
in ON-VEHICLE ADJUSTMENTS article.
- Turn A/C and blower on, then recheck idle speed. Idle speed should now be 875 RPM or more (on 2.4L), or 850 RPM or more (on 3.3L). If idle speed is as specified, go to next step. If idle speed is not as specified, verify that A/C compressor functions normally. If A/C compressor functions normally, turn A/C off and go to next step. If A/C compressor does not function normally, repair A/C system as necessary. See appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
- Turn ignition off. Disconnect Idle Air Control Valve-Fast Idle Control Device (IACV-FICD) solenoid valve 2-pin harness connector. See Fig 1 or Fig 2
. Start engine. Turn A/C and blower on. Measure voltage between ground and IACV-FICD solenoid valve harness connector terminal No. 2 (Green/Black wire). If battery voltage does not exist, go to next step. If battery voltage exists, go to step 5.
- On 2.4L, check the following:
- Check for open or short in Green/Black wire between IACV-FICD solenoid valve and in-line harness connector F27. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
On 3.3L, check the following:
- Check for poor, loose, corroded or damaged terminal connections at in-line harness connectors F38 and F102. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- Check for open or short in Green/Black wire between IACV-FICD solenoid valve and in-line harness connector F27.
If problem is found, repair as necessary. After repair, retest system.
- Turn ignition off. Check continuity between ground and IACV-FICD solenoid valve harness connector terminal No. 1 (Black/Red wire). Continuity should exist. Also, check circuit for short to voltage. If problem is found, go to next step. If no problem is found, go to step 8.
- Check continuity in Black/Yellow wire between IACV-FICD solenoid valve harness connector terminal No. 1 and Ambient Temperature (AT) sensor harness connector terminal No. 2. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Continuity should exist. If problem is found, go to next step. If no problem is found, go to step 8.
- On 2.4L, check the following:
- Check for open or short in circuits between ground and IACV-FICD solenoid valve. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
On 3.3L, check the following:
- Check for poor, loose, corroded or damaged terminal connections at in-line harness connectors F38 and F102. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- Check for poor, loose, corroded or damaged terminal connections at in-line harness connectors F36 and M81.
- Check for poor, loose, corroded or damaged terminal connections at in-line harness connectors M65 and E43.
- Check for open or short in diode F35.
- Check for open or short in circuits between ground and ambient temperature switch.
- Check for open or short in circuits between IACV-FICD solenoid valve and ambient temperature switch.
If problem is found, repair as necessary. After repair, retest system.
- Check IACV-FICD solenoid valve. See IDLE AIR CONTROL VALVE-FAST IDLE CONTROL DEVICE SOLENOID VALVE . If problem is found, replace IACV-FICD solenoid valve. If IACV-FICD solenoid valve is okay, go to next step.
- No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS
in TROUBLE SHOOTING - NO CODES article.
Courtesy of NISSAN MOTOR CO., U.S.A.
Courtesy of NISSAN MOTOR CO., U.S.A.