1. Remove the flywheel..
2. Perform the following procedures to inspect the flywheel.
If there is any malfunction or it exceeds the maximum specification, replace the flywheel..
a. Inspect the surface that contacts the clutch disc for scratches, nicks, and discoloration.

Correct slight scratches and discoloration using sandpaper.
b. Inspect the ring gear teeth for damage and wear.
c. Inspect the runout of the surface that contacts the clutch disc.

i. Install the flywheel..
ii. Measure the runout of the surface that contacts the clutch disc using a dial gauge.
0.1 mm {0.004 in}
Clutch Unit Removal/Installation [C66 M R]
Pilot Bearing Inspection [C66 M R]DSC HU/CM Inspection
1. Disconnect the DSC HU/CM connector..
2. Connect the negative battery cable..
3. Attach the tester lead to the DSC HU/CM wiring harness-side connector and
inspect voltage, continuity, or resistance according to the standard (reference)
on the table.
Standard (Reference)
...
Add-On Non-Genuine Parts and
Accessories
Non-genuine parts and accessories for Mazda vehicles can be found in stores.
These may fit your vehicle, but they are not approved by Mazda for use with
Mazda
vehicles. When you install non-genuine parts or accessories, they could affect
your vehicle's
performance or safety systems; the Maz ...
Heated Oxygen Sensor (HO2 S) Inspection [Mzr 2.0, Mzr 2.5]
HO2S Inspection
1. Connect the M-MDS to the DLC-2.
2. Switch the ignition to ON.
3. Warm up the engine to normal operating temperature.
4. Access the following PIDs using the M-MDS..
VSS (Vehicle speed)
RPM (Engine speed)
O2S12 (HO2S output voltage)
5. Drive ...