Endurant XD
TRTS0960 EN-US
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September 2024 - A

Fault Code 184: Engine Demand Percent Torque

J1939: SA 3 SPN 2432 FMI 13, 19

Overview

The Transmission Control Module (TCM) receives Engine Demand Percent Torque messages from a vehicle Electronic Control Unit (ECU) over the Secondary Data Link (J1939B). This information is used to determine transmission performance. The Secondary Data Link is connected to the TCM at the 20-Way TCM Body Harness Connector.

Detection

The TCM monitors Engine Demand Percent Torque messages. If messages are not available or are invalid, the fault is set Active.

Conditions to Set Fault Code Active

FMI 13 – Out of Calibration: Engine Demand Percent Torque message not available for 5 seconds.

FMI 19 – Received Network Data in Error: Engine Demand Percent Torque messages invalid for 5 seconds.

Fallback

FMI 13, 19:

  • Amber warning lamp on
  • If Fault Code 115, 165, 171, or 185 is Active:
    • Coast Mode and Neutral Coast prohibited
    • Urge to Move and Creep Mode prohibited
    • Inertia Brake activation prohibited
    • Upshifts prohibited
    • Clutch engagements prohibited
    • Non-Neutral modes prohibited
    • PTO mode prohibited
    • Hill Start Aid prohibited
  • If vehicle is moving:
    • Red stop lamp on

Note: Vehicle may have additional fallback modes. Refer to OEM.

Conditions to Set Fault Code Inactive

FMI 13, 19: Engine Demand Percent Torque messages available and valid for 10 seconds.

Possible Causes

FMI 13, 19:

  • Vehicle Components
    • Engine Demand Percent Torque message not enabled
    • Other vehicle ECU(s) faulted
  • Vehicle Harness - Secondary Data Link (J1939B)
    • Wiring shorted to power, shorted to ground or open
    • Terminals bent, spread, corroded, or loose

Note: Refer to OEM for troubleshooting a failed system.

Fault Code 184 Troubleshooting

A
Purpose:Direct troubleshooting to OEM.

  1. Set vehicle parking brake and chock wheels.

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

  • If Fault Code 184 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 184 FMI 13 is Active, refer to OEM and enable vehicle Engine Demand Percent Torque message (SPN 2432). Go to Step V

  • If Fault Code 184 FMI 13 is Inactive, Go to Step V

  • If Fault Code 184 FMI 19 is Active or Inactive, refer to OEM guidelines for repair of the vehicle Engine Demand Percent Torque message (SPN 2432). Go to Step V

V
Purpose:Verify repair.

  1. Key off.

  2. Reconnect all connectors and verify 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.

  • If no fault codes set and vehicle operates properly, test complete.

  • If Fault Code 184 sets Active, Go to Step A

  • If a fault code other than 184 sets Active, go to Fault Code Isolation Procedure Index.