Mazdaspeed6 L4-2.3L Turbo (2006)
1. Verify that there is no continuity between the commutator and the core at each segment using an ohmmeter.
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If there is continuity, replace the armature.
2. Verify that there is no continuity between the commutator and the shaft using an ohmmeter.
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If there is continuity, replace the armature.
3. Place the armature on V-blocks, and measure the runout using a dial indicator.
Runout: 0.05 mm {0.002 in} max.
4. Measure the commutator diameter.
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If not within the minimum specification, replace the armature.
Standard commutator diameter: 29.4 mm {1.16 in}
Minimum commutator diameter: 28.8 mm {1.13 in}
