Isuzu 4HK-1 - Page 25

57 Engine Control System
Circuit diagram
(Refer to “Wiring diagrams” for a way to read the diagram.)
Main relay circuit
TSWG0027
FUSE B 20A
(20A)*
52
B+ B+
40 21 E-57 E-57 E-57 E-57
Main relayBattery
Engine control module (ECM)
()*