Endurant XD
TRTS0960 EN-US
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September 2024 - A

Fault Code 705: Transmission Clutch Actuator

J1939: SA 3 SPN 788 FMI 12, 14

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 12 – Bad Intelligent Device: TCM did not prohibit Creep Mode as expected based on operating conditions.

FMI 14 – Special Instructions: TCM did not disengage clutch as expected based on operating conditions.

Fallback

FMI 12, 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

Conditions to Set Fault Code Inactive

FMI 12, 14: Key cycle and fault condition no longer exist.

Possible Causes

FMI 12, 14:

  • TCM
    • Software issue
    • Internal failure

Additional Tools

  • Endurant XD Service Manual TRSM0960

Fault Code 705 Troubleshooting

A
Purpose:Check for active or inactive fault codes.

  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 705 FMI 14 is Active or Inactive, and the vehicle is equipped with a Navistar A26 engine, Go to Step B

  • If Fault Code 705 FMI 12 is Active or Inactive, Go to Step C

  • If Fault Code 705 FMI 14 is Active or Inactive and the vehicle is not equipped with a Navistar A26 engine, Contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V

B
Purpose:Verify TCM software.

  1. Key off.

  2. Allow TCM to perform a complete power down.

  3. Key on with engine off.

  4. Connect ServiceRanger.

  5. Go to “Programming”.

  6. Under "Software Information", record TCM software in table.

  • If TCM software is less than 5516014, update TCM software to latest available version. Go to Step V

  • If TCM software is equal to or greater than 5516014, 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 Version
C
Purpose:Verify TCM Software

  1. Key off.

  2. Allow TCM to perform a complete power down.

  3. Key on with engine off.

  4. Connect ServiceRanger.

  5. Go to “Programming”.

  6. 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 for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V

TCM Software Version
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.