Engine Speed Signal Inspection

Symptom: Improper tachometer indication.

1. CHECK COMBINATION METER INPUT SIGNAL
   1. Start engine and select "METER/M&A" on CONSULT-III.
   2. Using "TACHO METER" on "DATA MONITOR", compare the value of "DATA MONITOR" with tachometer pointer of combination meter.

      OK or NG 

      OK:

      • Perform ECM self-diagnosis. Refer to "CONSULT-III FUNCTION (ENGINE) " (with QR25DE).
      • Perform ECM self-diagnosis. Refer to "CONSULT-III FUNCTION (ENGINE) " (with MR20DE for California).
      • Perform ECM self-diagnosis. Refer to "CONSULT-III FUNCTION (ENGINE) " (with MR20DE except California).

      NG: Replace combination meter. Refer to "REMOVAL AND INSTALLATION ".