Engine Speed Signal Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Infiniti FX45, 2005 Infiniti FX35, 2004 Infiniti FX45, 2004 Infiniti FX35, and 2003 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

Symptom: Tachometer indication is malfunction.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Start an engine and select "METER A/C AMP" on CONSULT-II.
2. Using "TACHO METER" on "DATA MONITOR", compare the value of "DATA MONITOR" with tachometer pointer of combination meter.
OK or NG
1. OK: GO TO 2.
2. NG: Replace combination meter.
Fig 1: CONSULT-II Diagnosis Function Display (1 Of 5)
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Select "ENGINE" on CONSULT-II.
2. Using "ENG SPEED" on "DATA MONITOR", print out the CONSULT-II screen when the engine is idling.
3. Select "METER A/C AMP" on CONSULT-II.
4. Using "TACHO METER" on "DATA MONITOR", compare the value of "DATA MONITOR" of the idling speed with that of the "ENG SPEED".
OK or NG
1. OK: Perform ECM self-diagnosis. Refer to "CONSULT-II FUNCTION (ENGINE) " (for VQ35DE) or "CONSULT-II FUNCTION (ENGINE) " (for VK45DE).
2. NG: Replace unified meter and A/C amp. Refer to "REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. ".
Fig 2: CONSULT-II Diagnosis Function Display (2 Of 5)
Courtesy of NISSAN MOTOR CO., U.S.A.