Endurant XD
TRTS0960 EN-US
|
September 2024 - A

Fault Code 706: Clutch Position Out of Range

J1939: SA 3 SPN 2983 FMI 17, 18

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 - Full Exhaust Position (FEP) and input shaft speed to ensure proper clutch operation.

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 FEP. If FEP is out of range, the fault is set Active.

Conditions to Set Fault Code Active

FMI 17 – Data Valid but Below Normal (Least Severe): Clutch calibrated FEP is above 35 mm after more than 10 actuations during a key cycle.

FMI 18 – Data Valid but Below Normal (Moderately Severe): Clutch calibrated FEP is above 37 mm after more than 10 actuations during a key cycle.

Fallback

FMI 17, 18:

  • Amber warning lamp on
  • No degraded modes

Conditions to Set Fault Code Inactive

FMI 17, 18:

  • Key cycle and fault condition no longer exist.

Possible Causes

FMI 17, 18:

  • Clutch Housing
    • Clutch Assembly
    • Release Bearing
    • Release Yoke

Additional Tools

  • Endurant XD Service Manual TRSM0960

Fault Code 706 Troubleshooting

A
Purpose:Check for active or inactive fault codes.

  1. Set the 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 706 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 706 FMI 17, 18 is Active or Inactive, clutch components (i.e. related linkages / and or clutch) resulted in the fully engaged position to be out of range. Clutch components must be inspected. Contact Eaton Cummins Automated Transmission Technologies at +1-800-826-4357 for further diagnostic instructions. Go to Step V

    Note: Refer to Endurant XD Service Manual TRSM0960, Clutch Service Procedure.

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.

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

  • If Fault Code 706 sets Active, contact Eaton Cummins Automated Transmission Technologies at +1 800-826-4357 for further diagnostic instructions.

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