Engine Controls - Trouble Shooting - No Codes: NVH Infiniti M45 II

IDLING VIBRATION

1. Check fuel pump circuit.
2. Check fuel pressure regulator. See «BASIC DIAGNOSTIC PROCEDURES»(ref-151802) article.
3. Check fuel injector circuits.
4. Check EVAP system.
5. Check PCV system.
6. Check idle speed adjustment. See «ON-VEHICLE ADJUSTMENTS»(ref-151800) article.
7. Check Idle Air Control Valve-Auxiliary Air Control (IACV-AAC) valve circuit (QX4 only).
8. Check ignition timing. See «ON-VEHICLE ADJUSTMENTS»(ref-151800) article.
9. Check ignition circuits.
10. Check ECM power and ground circuits.
11. Check A/C circuit.
12. Check mass airflow sensor circuit.
13. Check front HO2S circuits.
14. Check engine coolant temperature sensor circuit.
15. Check TP sensor circuit.
16. Check TP sensor adjustment (QX4 only). See «ON-VEHICLE ADJUSTMENTS»(ref-151800) article.
17. Check for faulty ECM. See appropriate SELF-DIAGNOSTICS article.
18. Check park/neutral position switch circuit (Only I35 & QX4).
19. Check power steering pressure sensor/switch circuit.
20. Check electrical load signal circuit (Except I35 & QX4).