Engine Speed Signal Inspection

WARNING: This page is about a different car, the 2005 Nissan 350Z. 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 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
- OK : GO TO 2.
- NG : Replace combination meter.
Fig 1: Scan Tool Display "Data Monitor"
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".
  
  Fig 2: Scan Tool Display "Data Monitor"
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK : Perform ECM self-diagnosis. Refer to "CONSULT-II FUNCTION (ENGINE) ".
- NG : Replace unified meter and A/C amp. Refer to "REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. ".