Explanation
There is a communication problem with the SmartCraft control system.
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).
• Incorrect number of resistors used
• Faulty terminator resistor
Summary of Fault Correction Possibilities
• Correct the wiring issue.
• Install the correct count of resistors.
• Replace the faulty resistor.
D ..........
DemandSensor1_RangeHigh
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Sticky Caution 100% 1061‑24 Yes 2
Explanation
The primary encoder in the throttle demand sensor does not appear to be working properly; the PCM received a signal that is
above the valid limit.
Possible Causes
• Wiring problem
• Defective sensor
Summary of Fault Correction Possibilities
• Check the wiring.
• Replace the sensor.
DemandSensor1_RangeLow
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Sticky Caution 100% 1061‑25 Yes 2
Explanation
The primary encoder in the throttle demand sensor does not appear to be working properly; the PCM received a signal that is
below the valid limit.
Possible Causes
• Wiring problem
• Defective sensor
Summary of Fault Correction Possibilities
• Check the wiring.
• Replace the sensor.
DemandSensor2_RangeHigh
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Sticky Caution 100% 1062‑24 Yes 2
Fault Codes
Page 4A-10 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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