6771

UnclassifiedFuel

What This Code Means

CAN control non-functional; Current consumption exceeds DSE unit output specification; Fuel Relay Output failure; CANbus communication errors

Possible Causes

  • Deutz ECU parameter 4400 not enabled
  • Direct connection to high-draw component (Fuel Relay or Start Relay)
  • Incorrect module configuration
  • Incorrect cable impedance
  • Unscreened cable
  • Incorrect screen grounding

Suggested Actions

  1. 1Using the Deutz service tool software, change parameter 4400 on Page 6 to ‘1’
  2. 2Install an external slave relay
  3. 3Check current consumption against DSE unit output specification
  4. 4Configure the Fuel Relay Output to CAN ECU Power
  5. 5Use only screened 120 Ω impedance cable approved for CANbus applications
  6. 6Connect CANbus cable screen at one end only

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 6771 on your specific Deep Sea Electronics unit — cited to the OEM manual, not a forum guess.

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