Mazda MX-5 Miata / Grand Touring. Manual - part 173

Fig. 15: Measuring Segment Groove Depth Of Commutator 
Courtesy of MAZDA MOTORS CORP. 

Magnetic Switch 

1. Inspect for continuity between terminals S and M using a tester. 



If there is no continuity, replace the magnetic switch. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Starting System - MX-5 Miata

  

Fig. 16: Verifying If There Is Continuity Between Terminals S & M 
Courtesy of MAZDA MOTORS CORP. 

2. Inspect for continuity between terminal S and the body using a tester. 



If there is no continuity, replace the magnetic switch. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Starting System - MX-5 Miata

  

Fig. 17: Verifying If There Is Continuity Between Terminal S & Body 
Courtesy of MAZDA MOTORS CORP. 

3. Verify that there is no continuity between terminals M and B using a tester. 



If there is continuity, replace the magnetic switch. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Starting System - MX-5 Miata

  

Fig. 18: Verifying If There Is No Continuity Between Terminals M & B 
Courtesy of MAZDA MOTORS CORP. 

Brush And Brush Holder 

1. Verify that there is no continuity between each insulated brush and plate using a tester. 



If there is continuity, replace the brush holder. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE Starting System - MX-5 Miata