Eaton Fuller Advantage (2017) Fault Code: 23 PID: SPN: 520215 FMI: 14 Urge to Move Brake Switch Signal: Special Instructions

Description

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 14 – Special Instructions: UTM is enabled and the TECU has never received the Brake Pedal Position or Brake Application Pressure signal messages in 5 seconds

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 14:
1) Vehicle not equipped with brake signal messages required to support UTM.
2) Brake Pedal Position or Brake Application Pressure signal message never received