• Faulty command module or PCM
Summary of Fault Correction Possibilities
• Reconfigure the vessel.
• Replace the modules.
DmdSense1_NoAdapt
Fault Type: Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 1071‑6 Yes 2
Explanation
The primary encoder in the throttle demand sensor does not appear to be working properly.
Possible Causes
• Wiring problem
• Throttle cable out of adjustment
• Defective sensor
Summary of Fault Correction Possibilities
• Check the wiring.
• Check the throttle cable adjustment.
• Replace the sensor.
DmdSense2_NoAdapt
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 1072‑6 Yes 2
Explanation
The secondary encoder in the throttle demand sensor does not appear to be working properly.
Possible Causes
• Wiring problem
• Throttle cable out of adjustment
• Defective sensor
Summary of Fault Correction Possibilities
• Check the wiring.
• Check the throttle cable adjustment.
• Replace the sensor.
Dual_CAN_SOH_Faults
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Sticky Critical 5% 4012‑6 Yes 4
Explanation
This fault indicates that communication between the helm and the PCM has been lost. There is a discrepancy between CAN
circuits.
NOTE: The engine is locked in whichever gear it was in when the fault occurred.
Possible Causes
• Open or short on CAN P (blue and white wires; should measure 58–60 ohms across bottom PCM engine harness pins A11
and A21 and across command module harness pins 8 and 9) or CAN X (brown and yellow wires; should measure 58–60
ohms across bottom PCM engine harness pins A31 and A32 and across command module harness pins 6 and 7).
Fault Codes
Page 4A-12 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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