Brush and brush holder
WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that there is no continuity between each insulated brush and plate using an ohmmeter.
- If there is continuity, replace the brush holder.
- Measure the brush length.
- If any brush is worn almost to or beyond the minimum specification, replace all the brushes.
Standard brush length
- AT: 17.5 mm {0.69 in}
- MT: 12.3 mm {0.48 in}
Minimum brush length
- AT: 12.0 mm {0.47 in}
- MT: 7.0 mm {0.28 in}
- Measure the brush spring force using a spring balance.
- If not within the minimum specification, replace the brush spring.
Standard spring force
- AT: 23.3-31.7 N {2.38-3.23 kgf, 5.24-7.12 lbf}
- MT: 18.3-24.9 N {1.87-2.53 kgf, 4.12-5.59 lbf}
Minimum spring force
- AT: 10.0 N {1.02 kgf, 2.25 lbf}
- MT: 5.9 N {0.6 kgf, 1.3 lbf}