Instrument Cluster Inspection: Tachometer

CAUTION:

• If the engine speed exceeds the allowable range, the engine could be damaged. Therefore, when inspecting the tachometer, do not allow the engine speed to exceed the allowable range indication on the tachometer.

1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
   • When using the IDS (laptop PC)
   1. Select "Datalogger".
   2. Select "Modules".
   3. Select "IC".
3. Verify that it is displayed according to the table using TACHOMTR".

• If the tachometer does not move or the indication is not within the allowable range, inspect the related wiring harnesses.

• If the related wiring harnesses are normal, replace the instrument cluster.

Fig 1: DLC-2 Location

Courtesy of MAZDA MOTORS CORP.

M-MDS FUNCTION CHART

M-MDS display	Instrument cluster display
3,000 RPM	Tachometer gauge needle moves to approx. 3,100 rpm
6,000 RPM	Tachometer gauge needle moves to approx. 6,200 rpm
Off	Tachometer gauge needle moves to 0 rpm