Overview:
Fault Code 72 indicates the transmission is unable to select the required rail during a shift.
Detection:
The transmission detects this by attempting the same shifter actions 5 times and not sensing the desired position.
Fallback:
This fault causes an in-place fallback.
Possible Causes:
1) Low power to Rail Motor
2) Rail Select Motor
3) Rail Select Sensor
4) Shift Block
5) Transmission Controller
6) Rail slips into gear during vehicle transportation
Shop Talk:
Complete several shifts while the vehicle is in motion, including selections from neutral. Also allow the transmission to complete several automatic
shifts.
Eaton Gen 2 (AutoShift) Fault Code: 71 PID: SID 60 FMI: 7 Stuck Engaged
Eaton Gen 2 (AutoShift) Fault Code: 65 PID: SID 251 FMI: 4 Logic Power
Eaton Gen 2 (AutoShift) Fault Code: 63 PID: SID 40 FMI: 6 Gear Select Motor
Eaton Gen 2 (AutoShift) Fault Code: 63 PID: SID 40 FMI: 5 Gear Select Motor
Eaton Gen 2 (AutoShift) Fault Code: 61 PID: SID 39 FMI: 6 Rail Select Motor
Eaton Gen 2 (AutoShift) Fault Code: 61 PID: SID 39 FMI: 5 Rail Select Motor
