Dmdsense1_Noadapt; Dmdsense2_Noadapt; Dual_Can_Soh_Faults - Mercury V6 175 Diagnostic Manual

Fault Codes
• Faulty command module or PCM
Summary of Fault Correction Possibilities
• Reconfigure the vessel.
• Replace the modules.

DmdSense1_NoAdapt

Fault Type: Horn:
Nonsticky Caution
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:
Nonsticky Caution
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:
Sticky Critical
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).
Page 4A-12
Guardian: UFC:
100% 1071‑6
Guardian: UFC:
100% 1072‑6
Guardian: UFC:
5% 4012‑6
© 2018 Mercury Marine
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Freeze Frame Priority:
2
Freeze Frame Priority:
2
Freeze Frame Priority:
4
90-8M0146617 eng JULY 2018