• Replace the worn gearcase components.
• Replace the shift actuator.
ESC_NoAdapt_Forward
Fault Type: Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 3034‑6 Yes 2
Explanation
The shift actuator does not appear to be working properly.
Possible Causes
• Wiring problem
• Worn linkage between shift shaft and shift actuator
• Worn gearcase components
• Faulty shift actuator
Summary of Fault Correction Possibilities
• Correct the wiring problem.
• Replace the worn shift linkage components.
• Replace the worn gearcase components.
• Replace the shift actuator.
ESC_NoAdapt_Reverse
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 3033‑6 Yes 2
Explanation
The shift actuator does not appear to be working properly.
Possible Causes
• Wiring problem
• Worn linkage between shift shaft and shift actuator
• Worn gearcase components
• Faulty shift actuator
Summary of Fault Correction Possibilities
• Correct the wiring problem.
• Replace the worn shift linkage components.
• Replace the worn gearcase components.
• Replace the shift actuator.
ESC_TimeOut
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Sticky Critical 100% 3037‑6 Yes 2
Explanation
This fault indicates that the shift actuator has not physically moved with respect to the control lever (demand) position. This can
also denote the PCM is constantly trying to adjust the ESC because it is falling out of the adapted position. If the ESC tries to
continuously adjust, the PCM will time out the circuit. This fault is most prevalent under high torque use.
Possible Causes
• Wiring problem
Fault Codes
Page 4A-16 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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