Endurant HD
TRTS0950 EN-US
|
October 2024 - B

Fault Code 705: Transmission Clutch Actuator

J1939: SA 3 SPN 788 FMI 12, 14

Overview

The Endurant HD transmission 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 vehicle inputs, clutch command, clutch position and input shaft speed to ensure proper clutch operation. The Linear Clutch Actuator (LCA) is mounted to the Mechatronic Transmission Module (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 Transmission Clutch Actuator. 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 when expected based on the operating conditions.

FMI 14 – Special Instructions: TCM did not release/open the clutch when expected based on the operating conditions.

Fallback

FMI 12, 14:

  • 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
    • Transmission shifts to neutral, vehicle may coast to a stop

Conditions to Set Fault Code Inactive

FMI 12, 14: Key cycle

Possible Causes

FMI 12, 14:

  • TCM
    • Software issue
    • Internal failure

Additional Tools

  • Endurant HD Service Manual TRSM0950

Fault Code 705 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 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 the TCM software is less than 5516014, update the TCM software to latest available version. Go to Step V

  • If the 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 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 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 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.