Toyota 1 MZ–FE Manual page 569

Check for open in harness and connector between main relay
and battery, main relay and ECM (See page IN–31).
Check IGN fuse.
Check ignition switch (See page BE–14).
Check for open in harness and connector between
IG switch and main relay, main relay and body
ground (See page IN–31).
1MZ–FE ENGINE – CIRCUIT INSPECTION
Repair or replace harness or connector.
Remove IGN fuse from J/B No–1
Check continuity of IGN fuse.
Continuity
Check for short in all the harness and
components connected to IGN fuse.
Replace ignition switch.
EG2–569