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Commutator Cleaning and Inspection
●If necessary, polish the surface [A] of commutator with a crocus
cloth [B] and clean the groove
●Measure the diameter [A] of commutator [B]
★If the diameter of commutator is shorter than the service limit,
replace the starter motor with a new one
Commutator Diameter
Standard: 28mm
Service limit: 27mm
★If the resistance between two commutators is higher or there is no
reading, the coil is open-circuit and the starter motor must be
replaced.
●Measure the resistance between commutator [A] and shaft [B] with
a multimeter
★If the reading is 0, the armature is short-circuited and the starter
motor must be replaced
Carbon Brush Leads Inspection
●Measure the resistance by using a multimeter with the range set as
× 1Ω, as shown in the figure
End bolt and positive carbon brush [A]
Start motor front cover and negative carbon
brush [B]
★If the resistance is not close to 0Ω, the carbon brush lead is
open-circuit. The carbon brush plate assembly needs to be replaced
Start Motor Front Cover Assembly Inspection
●Measure the resistance by using a multimeter with the range set as
the maximum, as shown in the figure
Terminal and start mtor front cover [A]
★If there is any reading, the start mtor front cover assembly is
short-circuited. Replace the start mtor front cover assembly
7-23
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Troubleshooting
