Endurant HD
TRTS0950 EN-US
|
November 2024 - B

Fault Code 706: Clutch Position Out of Range

J1939: SA 3 SPN 2983 FMI 17, 18

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 the clutch command, clutch position - Full Exhaust Position (FEP) 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 clutch position. If a system failure is detected, the fault is set active.

Conditions to Set Fault Code Active

FMI 17 – Data Valid but Below Normal (Least Severe): After 1,000 clutch actuations, clutch calculated FEP is above 36 mm after more than 10 actuations during a key cycle.

FMI 18 – Data Valid but Below Normal (Moderately Severe): After 1,000 clutch actuations, clutch calculated FEP is above 38 mm after more than 10 actuations during a key cycle.

Fallback

FMI 17:

  • No degraded mode

FMI 18:

  • Amber warning lamp on

Conditions to Set Fault Code Inactive

FMI 17, 18:

  • Condition no longer exists
  • Key cycle

Possible Causes

FMI 17, 18:

  • Clutch Housing
    • Release Bearing
    • Release Yoke
    • Release Yoke Pivot Pin
    • Clutch Assembly

Additional Tools

  • Endurant HD Service Manual TRSM0950

Fault Code 706 Troubleshooting

A
Purpose:Check for active or inactive fault codes.

  1. Set the 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 706 FMI 17, 18 is Active or Inactive, perform TAIB0889 Clutch Release System Wear/Damage. Go to Step V

    Note: Reference Endurant HD Service Manual TRSM0950 for all service procedures.

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.

  • If no fault codes set and the vehicle operates properly, test complete.

  • If Fault Code 706 sets Active during operation, contact Eaton Cummins Automated Transmission Technologies at 800-826-4357 for further diagnostic instructions.

  • If a fault code other than 706 sets Active, troubleshoot per Fault Code Isolation Procedure Index