Fault Code 701: Clutch Engagement Status
J1939: SA 3 SPN 7847 FMI 14, 31
Overview
The Endurant XD Series transmissions are equipped with solenoid valves that direct vehicle Supply Air to and from the Linear Clutch Actuator (LCA) to control clutch position. A position sensor monitors clutch position and provides the information to the Transmission Control Module (TCM) for the purpose of making clutch engagement or disengagement decisions. The TCM compares the clutch command, clutch position and input shaft speed to ensure the transmission is operating properly.
The LCA is mounted to the Mechatronic Transmission Module (MTM). The solenoids and position sensor are located in the MTM and connected to the TCM at the 74-Way Transmission Harness Connector.
Detection
The TCM monitors clutch operation. If a system failure is detected, the fault is set Active.
Conditions to Set Fault Code Active
FMI 14 – Special Instructions: Inappropriate clutch engagement command based on operating conditions. Engaged gear direction doesn't match driver selected mode.
FMI 31 – Condition Exists: Inappropriate clutch engagement command based on operating conditions. Vehicle launch without driver input.
Fallback
FMI 14:
- Amber warning lamp on
- Urge to Move and Creep Mode prohibited
- Non-Neutral modes prohibited
- PTO Mode prohibited
- If vehicle is moving:
- Red stop lamp on
FMI 31:
- Amber warning lamp on
- Urge to Move and Creep Mode prohibited
- Non-Neutral modes prohibited
- PTO Mode prohibited
Conditions to Set Fault Code Inactive
FMI 14, 31: Key cycle and fault condition no longer exist.
Possible Causes
FMI 14, 31:
- TCM
- Software issue
- Internal failure
Additional Tools
- Endurant XD Service Manual TRSM0960
Fault Code 701 Troubleshooting
Set vehicle parking brake and chock wheels.
Record transmission fault codes, FMIs, occurrences, and timestamps from 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 +1 800-826-4357 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 TCM software is less than 5516018, update TCM software to latest available version. Go to Step V
If TCM software is equal to or greater than 5516018, contact Eaton Cummins Automated Transmission Technologies at +1 800-826-4357 for further diagnostic instructions. Go to Step V
| TCM Software Version |
|---|
Key off.
Reconnect all connectors and verify 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 vehicle operates properly, test complete.
If Fault Code 701 sets Active, Go to Step A
If a fault code other than 701 sets Active, troubleshoot per the Fault Code Isolation Procedure Index.