Eaton Fuller Advantage (2017) Fault Code: 13 PID: SPN: 751 FMI: 11 J1939 Shift Control Device: FMI Unknown

Overview:
The Fuller Advantage transmission may be equipped with a J1939 Shift Control Device. This version of the Shift Control Device uses the J1939 Data Link to broadcast the driver’s shift request to the Transmission Electronic Control Unit (TECU). The system includes redundant neutral request and neutral confirmation signals hard-wired between the Shift Control Device and TECU. These redundant signals allow the transmission to achieve neutral if the J1939 Data Link fails.

Fault Code 13 indicates that either the TECU lost J1939 Data Link communications with the Shift Control Device or that the neutral request status received over J1939 and the neutral request status received through the hard-wired signal do not match

Detection:
The ignition key is on and the TECU has not detected any low battery system faults.

Conditions to Set Fault Code Active:
FMI 11 – FMI Unknown: TECU has lost communication with the J1939 Shift Control Device but can communicate with other devices on the J1939 Data Link. When no J1939 messages have been received for 5 seconds, the fault code sets Active.

Fallback:
FMI 11
• “F” does not flash in gear display.
• Service light does not flash (if equipped).
• Transmission may not attempt to shift.
• Until the fault becomes Inactive, driver may have to shut off engine with transmission in gear.

Conditions to Set Fault Code Inactive:
All FMIs: TECU receives a valid message over the J1939 Data Link

Possible Causes:
1) Data Link
– Bent, spread, or loose terminals
– Wiring shorted to ground, shorted to power or open
2) Vehicle Harness
– Bent, spread or loose terminals
3) Shift Control Device Power Supply
– Loss of supply battery voltage
– Loss of supply ignition voltage
– Loss of supply ground connection
4) Shift Control Device
– Internal failure