Endurant HD
TRTS0950 EN-US
|
October 2024 - B

Fault Code 141: XBR Brake Hold Mode

J1939: SA 3 SPN 15264 FMI 13, 19

Overview

The Transmission Control Module (TCM) receives the vehicle’s eXternal Brake Request (XBR) Brake Hold Mode message from a vehicle Electronic Control Unit (ECU) over the Primary Data Link (J1939A). This information is used to determine transmission operation.

Detection

The TCM monitors XBR Brake Hold Mode messages. If messages are not received or are invalid, the fault is set Active.

Conditions to Set Fault Code Active

FMI 13 - Out of Calibration: XBR Brake Hold Mode message not available for 5 seconds.

FMI 19 - Received Network Data in Error: XBR Brake Hold Mode messages invalid for 5 seconds.

Fallback

FMI 13, 19:

  • Amber warning lamp on
  • Urge to Move and Creep Mode prohibited

Conditions to Set Fault Code Inactive

FMI 13, 19: XBR Brake Hold Mode messages received and valid for 10 seconds.

Possible Causes

FMI 13, 19:

  • Vehicle Components - Vehicle ECU(s)
    • Vehicle XBR Brake Hold Mode J1939 message not enabled
    • Other vehicle ECU(s) faulted
  • Vehicle Harness - Primary Data Link (J1939A)
    • Shorted to power, shorted to ground or open circuit
    • Terminals bent, spread, corroded, or loose

      Note: Refer to OEM for troubleshooting a failed system.

Additional Tools

  • None

Fault Code 141 Troubleshooting

A
Purpose:Check for Active or Inactive fault codes.

  1. Record the transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity Report created during the Diagnostic Procedure.

  • If Fault Code 141 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 141 FMI 13 is Active, Go to Step B

  • If Fault Code 141 FMI 13 is Inactive, Go to Step V

  • If Fault Code 141 FMI 19 is Active or Inactive, refer to OEM guidelines for repair of the vehicle XBR Brake Hold Mode message (SPN 15264). Go to Step V

B
Purpose:Verify External Braking Integration configuration with ServiceRanger and availability of vehicle XBR Brake Hold Mode message.

  1. Key on with engine off.

  2. Connect ServiceRanger.

  3. Go To “Configuration”.

  4. Select “Vehicle”.

  5. Record "External Braking Integration" Current Value.

  6. Refer to OEM and verify availability of the vehicle XBR Brake Hold Mode message (SPN 15264) from an OEM ECU.

  • If message is available, refer to OEM and enable vehicle XBR Brake Hold Mode message (SPN 15264). Go to Step V

  • If message is not available and "External Braking Integration" Current Value in ServiceRanger indicates “Supported”, select “Not Supported” and follow on-screen prompts. Go to Step V

V
Purpose:Verify Repair.

  1. Key off.

  2. Reconnect all connectors and verify that all components are properly installed.

  3. Key on with engine off.

  4. Connect ServiceRanger.

  5. Go to “Fault Codes”.

  6. Select “Clear All Faults”.

  7. Operate vehicle and attempt to reset the fault code or duplicate the previous complaint.

  8. Check for fault codes using ServiceRanger.