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 "SELF-DIAG RESULTS MODE ".

   NG: Replace combination meter. Refer to "COMBINATION METER ".