Guardian_Overspeed; Guardian_Uxpowerlimit - Mercury V6 175 Diagnostic Manual

Fault Codes

Guardian_Overspeed

Fault Type: Horn:
Nonsticky None
Explanation
Engine Guardian is active due to excessive engine speed.
Possible Causes
• Engine is improperly propped
• Engine is mounted too high
• Engine is being trimmed too high
• Propeller is cavitating
Summary of Fault Correction Possibilities
• Install the correct propeller on the engine.
• Correct the installation issues.
• Refrain from trimming engine too high.
• Test with alternate propeller.

Guardian_uXPowerLimit

Fault Type: Horn:
Nonsticky None
Explanation
Engine Guardian is active due to a helm fault. Power will be limited as the control system may be compromised.
Possible Causes
• The command module has detected an issue and has enacted Guardian
Summary of Fault Correction Possibilities
• Use the CDS G3 diagnostic tool to read the command module faults.
• Refer to the DTS Diagnostic Manual P/N 8M0057654 for fault explanations.
Guardian_Voltage
Fault Type: Horn:
Nonsticky Caution
Explanation
Engine Guardian is active due to high or low battery voltage. Power will be limited to prevent engine damage.
Possible Causes
• Failed alternator
• Failed fusible link
Summary of Fault Correction Possibilities
• Replace the alternator.
• Replace the fusible link.
Page 4A-22
Guardian: UFC:
100% 2091‑23
Guardian: UFC:
Variable 2101‑23
Guardian: UFC:
Variable 2111‑23
© 2018 Mercury Marine
Transmission to Helm:
No
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Freeze Frame Priority:
4
Freeze Frame Priority:
4
Freeze Frame Priority:
4
90-8M0146617 eng JULY 2018