Honda Acura NSX 1991 Service Manual page 1072

Starting System
Solenoid Plunger Inspection
Check the contact points, and the face of the starter sole-
noid plunger for burning, pitting or any other defects. If
surfaces are rough, recordition with a strip of # 500 or
# 600 sandpaper.
23-86
Starter Field Winding Test
1 .
2.
SOLENOID
PLUNGER
CONTACTING
F A C E
Check for continuity between the brushes. If there's
no continuity, replace the armature housing.
Check for continuity between each brush and the
armature housing (ground).
If continuity exists, replace the armature housing.
ARMATURE HbUSlNG
(GROUND)
BRUSHES