Overview:Fault Code 31indicates an electrical failure of the Momentary Engine Ignition Interrupt Relay (MEIIR) circuit. Detection:The fault is detected during power up. The Shift Controller checks the MEIIR circuit every time the system is powered up. If the electrical characteristics of the circuit are incorrect, the fault code is set. Fallback:There is no fallback associated with this failure; however, if the engine speed flares uncontrollably while the transmission is in a gear, the transmission may not be able to achieve neutral if it is selected due to a torque lock condition. Possible Causes:1) OEM wiring2) Electrical failure in the MEIIR...

Overview:Fault Code 32 indicates the switched system voltage from the Shift Controller on Pin J2 and Pin K2 is below 7 volts. Detection:The fault is detected immediately after power up. Fallback:This fault causes an in-place fallback. Possible Causes:1) Low batteries2) OEM Harness3) Shift Controller Shop Talk:Key on. If the fault is present, the system should automatically detect the problem and set the code. If the fault is not present at key on, operate the vehicle and attempt to duplicate the driving conditions that triggered the fault code. Possible triggers include heat, vibration. Eaton Gen 2 (AutoShift) Fault Code: 31 PID:...

Overview:Fault Code 33 indicates the battery power supply to the Shift Controller Pin J1 and Pin K1 is below 7 volts. Detection:The fault is detected immediately after power up. This fault causes the Service light to flash, but cannot be retrieved via key clicks (because turning the ignition key off at this point results in an immediate shutdown). Fallback:If this fault occures while moving, it causes a current gear fallback. Once the vehicle is stopped, starting gear and reverse can be engaged. Possible Causes:1) Battery bus fuse/circuit breaker is open2) Low batteries3) Damaged Vehicle Harness4) Malfunctioning Shift Controller Shop Talk:Key...

Overview:Fault Code 35 indicates the transmission failed to communicate with the engine over the J1939 data link. Detection:Starting 75 seconds after key on and throughout the operation, the Shift Controller constantly communicates with the engine ECM. If communication fails for more than 5 seconds, Fault Code 35 is set. Fallback:If the fault occurs while moving, it causes a current gear fallback. Once vehicle has stopped, the starting gear and reverse can be engaged. If the failure occurs at system initialization, it causes an AutoSelect fallback mode. Possible Causes:1) J1939 data link2) Engine ECM3) Vehicle Harness or Connections4) Engine Harness or...

Overview:Fault Code 41 indicates the transmission is unable to complete a shift across the range. The range is either stuck in HI or LO, or cannot complete engagement into HI or LO. Detection:The transmission attempts the same range shift 5 consecutive times and determines the shift cannot be completed based on the speeds across the back box. Fallback:This fault causes a 5-speed fallback and the transmission stays in either LO range or HI range. When the vehicle comes to a stop, an attempt to shift into LO range is made. Possible Causes:1) Low air pressure2) Contaminated air supply3) Air leak4)...