Eaton Fuller Advantage (2017) Fault Code: 23 PID: SPN: 521 FMI: 13 Urge to Move Brake Switch Signal: Out of Calibration

Overview:
The Fuller Advantage transmission may be configured with the Urge to Move (UTM) feature. If enabled and the transmission is in gear, UTM allows the vehicle to start moving after the vehicle service brake is released without having to depress the accelerator pedal. The UTM feature requires a primary on/off brake switch signal and one of two secondary brake signal messages to function. The brake signal messages are broadcast via J1939 to the Transmission Electronic Control Unit (TECU).

Detection:
The TECU communicates with the vehicle over the J1939 Data Link. If the vehicle secondary brake signal messages are not received, the fault sets active.

Conditions to Set Fault Code Active:
FMI 13 – Out of Calibration: UTM is enabled and the TECU at one point received the Brake Pedal Position signal message but has not been received in 5 seconds or received in error

Fallback:
All FMIs:
• Urge to Move is inoperative.

Conditions to Set Fault Code Inactive:
All FMIs:
• Key off, TECU powered down, key on and one of the two secondary brake signal messages are available

Possible Causes:
FMI 13:
1) Brake or Vehicle Controller (OEM determined)
– Component and/or system fault
2) J1939 Data Link
– J1939 Data Link damage between TECU and Brake or Vehicle Controller
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground, shorted to power or open