Tachometer Check

Attach an external high quality tachometer to the engine speed detection connector on the harness side (such as with a paper clip).

Fig 1: Checking Tachometer
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: For tachometer check, use an external high quality inductive tachometer
Compare the readings of the vehicle tachometer and the external tachometer at every engine speed, and check if the variations are within the standard values.
1. Standard values:
Fig 2: Tachometer Standard Value Chart
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.