Bad F3 Fuse
electrical
Description
The F3 fuse is missing or blown on the stepper board for 3 seconds or more; engine and electric operation alarm only.
Activation Conditions
Stepper Board Fuse Alarm; Feedback from Stepper Board indicates fuse is missing or blown. Signal must be present for at least 3 seconds.
Unit Behavior
Engine and Electric Operation: Alarm only.
Reset Conditions
Replace or fix fuse issue.
Corrective Actions
1. Check Fuse F3 a. Visually check fuse. Verify correct fuse, and check fuse holder for damage, see Figure 2.5. Replace fuse as required. Clear alarms, restart and check for repeat alarm(s). b. Check voltage. Check voltage through the fuse, if fuse is blown, replace it. c. Check wiring from PCM34 - SP-18 - ENCU - 2SVM22. Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors.