Engine Speed Signal Inspection

Symptom: Tachometer indication is malfunction.

1. 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.
2. 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.