Mazda MX-5 Miata Sport 2007 Manual page 1904

Fig. 6: No-Load Test - Circuit Diagram
Courtesy of MAZDA MOTORS CORP.
MAGNETIC SWITCH OPERATION INSPECTION
Pull-out Test
NOTE:
Depending on the battery charge condition, the starter motor pinion may
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rotate while in an extended state. This is due to current flowing to the
starter motor through the pull-in coil to turn the starter motor, and does
not indicate an abnormality.
1. Verify that the starter motor pinion is extended while battery positive voltage is connected to terminal S
and the starter body is grounded.
If the starter motor pinion is not extended, repair or replace the starter.

2007 Mazda MX-5 Miata Sport
2007 ENGINE Starting System - MX-5 Miata