Mazda MX-5 NA silhouetteMX-5 NA

STARTING SYSTEM - Yoke assembly / Magnetic Switch / Brush and Brush Holder

G-28prose procedure
Continued from G-27

Yoke assembly

Yoke assembly inspection

  1. 1
    Wiring damage of field coil: (1) Check for continuity between the connector and the brushes with an ohmmeter. (2) Replace the yoke assembly if there is no continuity.
    Illustration of a yoke assembly held in a hand with an ohmmeter probe checking continuity between connector and brushes.
    05U0GX-069
  2. 2
    Ground of field coil: (1) Check for no continuity between the connector and the yoke with an ohmmeter. (2) Repair or replace the yoke assembly if there is continuity.
    Illustration of a yoke assembly with an ohmmeter probe checking for no continuity between connector and yoke (ground of field coil test).
    05U0GX-070
  3. 3
    Installation of field coil: Replace the yoke assembly if the field coil is loose.

Magnetic Switch

Magnetic Switch inspection

  1. 1
    Wiring damage (S terminal — M terminal): Check for continuity between terminal S and terminal M with an ohmmeter. Replace the magnetic switch if there is no continuity.
    Illustration of magnetic switch (solenoid) being checked between S and M terminals with an ohmmeter held by hand.
    05U0GX-071
  2. 2
    Wiring damage (S terminal — body): Check for continuity between terminal S and the body with an ohmmeter. Replace the magnetic switch if there is no continuity.
    Illustration of magnetic switch being checked between terminal S and body with an ohmmeter probe.
    05U0GX-072

Brush and Brush Holder

Insulation of brush holder

Check for no continuity between each insulated brush and the plate with an ohmmeter. Replace the brush holder if there is continuity.
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