Fault Code 206: TCM Program Memory
J1939: SA 3 SPN 628 FMI 2, 11, 12, 13, 14, 31
Overview
The Endurant HD transmission is 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 performance. 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 at 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: The TCM detected the calibration file is incompatible with the application software version.
FMI 11 – Root Cause Unknown: The TCM detected an internal processing error.
FMI 12 – Bad Intelligent Device: The TCM detected an internal processing error.
FMI 13 – Out of Calibration: The TCM detected an internal processing error.
FMI 14 – Special Instructions: The TCM detected the calibration file is incompatible with the application software version.
FMI 31 – Condition Exists: The TCM has detected that the End Of Line Test Calibration file is present.
Fallback
FMI 2, 11, 12, 13, 14:
- Amber warning lamp on
- Engine will not crank
- Non neutral modes prohibited
- Clutch engagement prohibited
- PTO mode prohibited
FMI 31:
- Amber warning lamp on
- Upshifts prohibited
- High start gears prohibited
Conditions to Set Fault Code Inactive
FMI 11, 12, 13: Key cycle
FMI 2, 14, 31: Correct calibration file is configured in the TCM.
Possible Causes
FMI 11, 12,13:
- TCM
- Software issue
- Internal failure
FMI 2, 14, 31:
- TCM
- Incorrect calibration file configured in the TCM or missing
Additional Tools
- Endurant HD Service Manual TRSM0950
Fault Code 206 Troubleshooting
Set vehicle parking brake and chock wheels.
Record the transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity report created during the Diagnostic Procedure.
If Fault Code 206 FMI 11, 12, 13 is Active or Inactive, Go to Step B
If Fault Code 206 FMI 2, 14 or 31 is Active, contact Eaton Cummins Automated Transmission Technologies at 800-826-4357 for further diagnostic instructions. Go to Step V
If Fault Code 206 FMI 2, 14 or 31 is Inactive, the correct calibration file is installed. Go to Step V
Key off.
Allow TCM to perform a complete power down.
Key on with engine off.
Connect ServiceRanger.
Go to “Programming”.
Under "Software Information", record TCM software in table.
If a TCM software update is available, update TCM software. Go to Step V
If the TCM is at the latest available software, Contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V
| TCM Software |
|---|
Key off.
Reconnect all connectors and verify that all components are properly installed.
Key on with engine off.
Connect ServiceRanger.
Go to “Fault Codes”.
Select “Clear All Faults”.
Operate vehicle and attempt to reset the fault code or duplicate the previous complaint.
Check for fault codes using ServiceRanger.
If no fault codes set and the vehicle operates properly, test complete.
If Fault Code 206 sets Active during operation, Go to Step A
If a fault code other than 206 sets Active, troubleshoot per Fault Code Isolation Procedure Index.