Endurant XD
TRTS0960 EN-US
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December 2024 - D

Fault Code 201: TCM Protection 1

J1939: SA 3 SPN 21150 FMI 2, 13, 14

Overview

The Endurant XD Series transmissions are equipped with a Transmission Control Module (TCM). The TCM communicates with other vehicle Electronic Control Units (ECUs), receives feedback from sensors and actuates solenoids to control transmission operation. The TCM is mounted to the transmission and connected to the 20-Way TCM Vehicle Harness Connector and 20-Way TCM Body Harness Connector. The TCM is connected to the transmission sensors and solenoids through the 74-Way Transmission Harness Connector.

Detection

The TCM performs a self-check during operation. If a failure is detected, the fault is set Active.

Conditions to Set Fault Code Active

FMI 2 - Data Erratic: TCM has detected an internal processing error.

FMI 13 – Out Of Calibration: TCM has detected an internal processing error.

FMI 14 – Special Instructions: TCM has detected an internal processing error.

Fallback

All FMIs:

  • Amber warning lamp on
  • No degraded modes

Note: Vehicle may have additional fallback modes.

Conditions to Set Fault Code Inactive

All FMIs: Key cycle and fault condition no longer exist

Possible Causes

All FMIs:

  • TCM
    • Software issue
    • Internal failure

Additional Tools

  • None

Fault Code 201 Troubleshooting

A
Purpose:Check for Active or Inactive fault codes.

  1. Set vehicle parking brake and chock wheels.

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

  • If Fault Code 201 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 201 FMI 2, 13, 14 is Active or Inactive, Contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. 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.