Denso RC7M Manual page 118

Step 3 Pull out the fuse to check.
Step 4 Using a circuit tester, check the removed fuse for continuity.
Step 5 If no continuity is observed with the fuse in Step 4:
(1) Check the wiring of the corresponding output connector and remove the cause of
the blown fuse.
(2) Insert a new fuse into place in the controller.
If continuity is observed with the fuse in Step 4, set the removed fuse back into place
in the controller.
Step 6 Set the controller upper cover back into place and restart the controller in the reverse
order of Steps 1 through 3.
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