Eaton Fuller Advantage (2017) Fault Code: 36 PID: SPN: 639 FMI: 14 J1939 Engine Message: Special Instructions

Overview:
The J1939 Data Link is a Controller Area Network (CAN) communication bus. The Fuller Advantage transmission uses the J1939 Data Link to communicate with other ECUs (ABS, Engine, Body Controller, etc.). The Transmission Electronic Control Unit (TECU) sends and receives messages from other ECUs on the data link to determine when to initiate a shift, hold shifts, command engine torque to make shifts, as well as other functions. Proper operation of the J1939 Data Link is critical for shift performance. Fault Code 36 indicates the TECU can communicate with other ECUs on the J1939 Data Link but has lost communication
with the Engine ECU.

Detection:
TECU has either lost communication or received erratic signals from the Engine ECU over the J1939 Data Link and the TECU has not detected any low or weak battery system fault codes.

Conditions to Set Fault Code Active:
FMI 14 – Special Instructions: TECU has either lost communication or has received erratic signals from the Engine ECU over the J1939 Data Link for 5 seconds or longer.

Fallback:
FMI 14
• “F” flashes in gear display.
• Service light flashes (if equipped).
• If vehicle is configured for the J1939 Start Enable feature the engine does not crank.
• If fault occurs during power up, the transmission requires the driver to manually synchronize shifts with the throttle.
• If fault occurs while driving, transmission remains in its current gear until the vehicle stops. Transmission then requires the driver to manually synchronize shifts with the throttle.

Conditions to Set Fault Code Inactive:
FMI 14: TECU receives messages across the data link for at least 10 seconds.

Possible Causes:
FMI 14
1) J1939 Data Link
– Wiring shorted to ground, shorted to power or open
– Excessive electrical noise
– Missing or additional terminating resistors
2) Engine ECU
– Internal failure
3) Vehicle Harness
– Wiring shorted to ground, shorted to power or open
4) Engine Harness
– Wiring shorted to ground, shorted to power or open