Diagnostic Procedure (2.4L)
WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Disconnect IACV-AAC valve harness connector. See Fig 1 . Turn ignition on. Measure voltage between ground and IACV-AAC valve harness connector terminal No. 2 (Yellow/Black wire). If battery voltage exists, go to step 3 . If battery voltage does not exist, go to next step.
- Check the following:
- Check fuse No. 15 (10-amp) located in fuse block under left side of instrument panel.
- Check for poor connection at fuse block connector M27 terminal 2N (Yellow/Black wire). See Figure .
- Check for open or short between IACV-AAC valve and fuse.
Repair as necessary.
- Turn ignition off. Disconnect ECM harness connector. See Figure or Figure . Check continuity of Orange/Blue wire between IACV-AAC valve harness connector terminal No. 1 and ECM harness connector terminal No. 101. See Figure . Also, check circuit for short to ground and short to voltage. If problem is found, repair as necessary. If problem is not found, go to next step.
- Measure resistance between IACV-AAC valve terminals. Resistance should be about 10 ohms at 77°F (25°C). Check plunger for seizing or sticking. Check for broken spring. If problem is found, replace IACV-AAC valve. If problem is not found, go to next step.
- No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.