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 communicationwith...

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 communicationwith...

Overview:The Fuller Advantage transmission is equipped with electronic components that require a high current. It is critical that the OEM power supply be able to deliver the proper voltage and current in these high-load situations for smooth and efficient shifting. Additional resistance introduced into the system can cause the supplied voltage to drop low enough to cause performance issues. Fault Code 37 indicates an excessive resistance between the power supply source (battery or starter) and the Transmission Electronic Control Unit (TECU). Detection:The TECU monitors the OEM power supply circuit for excessive resistance by measuring the voltage drop during high current...

Overview:The Fuller Advantage transmission is equipped with electronic components that require a high current. It is critical that the OEM power supply be able to deliver the proper voltage and current in these high-load situations for smooth and efficient shifting. Additional resistance introduced into the system can cause the supplied voltage to drop low enough to cause performance issues. Fault Code 37 indicates an excessive resistance between the power supply source (battery or starter) and the Transmission Electronic Control Unit (TECU). Detection:The TECU monitors the OEM power supply circuit for excessive resistance by measuring the voltage drop during high current...

Overview:Most Heavy-Duty Fuller Advantage Transmission models are equipped with a 2-speed range system in the auxiliary case. The ability to select an auxiliary range gear independently from a main case gear allows the transmission twice the number of overall gear ratios. Main case gearing can be used once in auxiliary low range and again in auxiliary high range. The range system is equipped with a Range Solenoid Valve. The Range Solenoid Valve is an electric-over-air solenoid that is controlled by the Transmission Electronic Control Unit (TECU), replacing the Shift Knob-Slave Valve system found on Eaton Fuller manual transmissions. During operation,...