Mazda CX-9 Grand Touring. Manual — part 141

1.8-2.2 ohm

Fig. 8: Measuring Resistance Between Slip Rings With Tester
Courtesy of MAZDA MOTORS CORP.

2. Verify that there is no continuity between the slip ring and core using a tester.



If there is continuity, replace the rotor.

3. Inspect the slip ring surface condition.



If the slip ring surface is rough, use a lathe or fine sandpaper to smooth it.

Fig. 9: Measuring Continuity Between Slip Ring & Core With Tester
Courtesy of MAZDA MOTORS CORP.

Stator coil

1. Verify that the continuity is as indicated in the table.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

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Fig. 10: Continuity Reference Chart
Courtesy of MAZDA MOTORS CORP.

Fig. 11: Identifying Stator Coil Terminal
Courtesy of MAZDA MOTORS CORP.



If there is any malfunction, replace the stator.

2. Verify that there is no continuity between the stator coil leads and core using a tester.



If there is continuity, replace the stator coil.

Fig. 12: Measuring Continuity Between Stator Coil Leads
Courtesy of MAZDA MOTORS CORP.

Brush

2008 Mazda CX-9 Grand Touring

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

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1. Inspect brushes for wear.



If any brush is worn almost to or beyond the limit, replace all of the brushes.

Generator brush length

Standard: 22.5 mm {0.89 in}

Minimum: 5.0 mm {0.20 in}

Fig. 13: Identifying Brush Length
Courtesy of MAZDA MOTORS CORP.

Brush spring

1. Measure the force of the brush spring using a spring pressure gauge.

2. Read the spring pressure gauge at the brush tip projection of 2 mm {0.079 in} .



Replace the brush spring if necessary.

Generator brush spring force

Standard: 4.1-5.3 N {0.42-0.54 kgf, 0.92-1.19 lbf}

Minimum: 1.7 N {0.17 kgf, 0.38 lbf}

Fig. 14: Measuring Force Of Brush Spring With Spring Pressure Gauge

2008 Mazda CX-9 Grand Touring

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

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Sunday, November 15, 2009 9:54:58 AM

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Courtesy of MAZDA MOTORS CORP.

Rectifier (Using an analog circuit tester)

1. Inspect for continuity of the diodes using an analog circuit tester.



If not as specified, replace the rectifier.

Specification

CONTINUITY SPECIFICATION

Fig. 15: Identifying Rectifier
Courtesy of MAZDA MOTORS CORP.

Rectifier (Using a digital circuit tester)

1. Inspect for continuity of the diodes using a digital circuit tester.



If not as specified, replace the rectifier.

Specification

CONTINUITY SPECIFICATION

Bearing

Negative

Positive

Continuity

E

P1, P2, P3, P4, P5, P6

Yes

B

No

P1, P2, P3, P4, P5, P6

E

No

B

Yes

Negative

Positive

Continuity

E

P1, P2, P3, P4, P5, P6

No

B

Yes

P1, P2, P3, P4, P5, P6

E

Yes

B

No

2008 Mazda CX-9 Grand Touring

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 9:54:58 AM

Page 14

© 2005 Mitchell Repair Information Company, LLC.