Fault Code 701: Clutch Engagement Status
J1939 SA 3 SPN 7847 FMI 14, 31
Overview
The Mechatronic Transmission Module (MTM) is equipped with solenoids to direct pneumatic flow to actuate the clutch and a sensor to monitor clutch position. The Transmission Control Module (TCM) compares the clutch command, clutch position and input shaft speed to ensure proper clutch operation. The Linear Clutch Actuator (LCA) is mounted to the MTM. The solenoids and sensors are located in the MTM and connected to the TCM at the 74-Way Transmission Harness Connector.
Detection
The TCM monitors the Clutch Engagement Status. If a system failure is detected, the fault is set active.
Conditions to Set Fault Code Active
FMI 14 – Special Instructions: Clutch commanded to close/engage in a gear which is in the opposite direction of the selected mode.
FMI 31 – Condition Exists: Clutch commanded to close/engage and launch vehicle without driver input or request.
Fallback
FMI 14, 31:
- Amber warning lamp on
- Non neutral modes prohibited
- Clutch engagement prohibited
- PTO Mode prohibited
- Urge to Move and Creep Mode prohibited
- If vehicle is moving
- Red stop lamp on
Conditions to Set Fault Code Inactive
FMI 14, 31: Key cycle
Possible Causes
FMI 14, 31:
- TCM
- Software issue
- Internal failure
Additional Tools
- Endurant HD Service Manual TRSM0950
Fault Code 701 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 701 FMI 14 is Active or Inactive, Go to Step B
If Fault Code 701 FMI 31 is Active or Inactive, contact Eaton Cummins Automated Transmission Technologies at 800-826-4357 for further diagnostic instructions. 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 the TCM software is less than 5516018, update the TCM software to latest available version. Go to Step V
If the TCM software is equal to or greater than 5516018, contact Eaton Cummins Automated Transmission Technologies at 800-826-4357 for further diagnostic instructions. Go to Step V
| TCM Software Version |
|---|
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 701 sets Active during operation, Go to Step A
If a fault code other than 701 sets Active, troubleshoot per the Fault Code Isolation Procedure Index.