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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
STARTER
ENGLISH
ELECTRICAL SYSTEM
27.6.3 Magnetic switch
1) Testing coil for open circuits
If there is no continuity between S and M
terminals and between S terminal and body
(ground) , replace the switch.
2) Checking contactors for fusion
If there is continuity between B and M
terminals, replace the switch.
3) Checking contactors for poor contact action
Check for voltage drop. If voltage drop is
excessive, the contactors are defective.
B terminal
M terminal
S terminal
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