The Endurant HD transmission is equipped with a Linear Clutch Actuator (LCA) Position Sensor to monitor clutch position. The LCA is mounted in the Mechatronic Transmission Module (MTM) and pneumatically controls the clutch position. The LCA is equipped with a magnet that the position sensor uses to detect the proximity of the LCA to determine clutch position. The LCA Position Sensor is located in the MTM and connected to the Transmission Control Module (TCM) at the 74-Way Transmission Harness Connector.

FMI 0 - Data Valid But Above Normal (Most Severe): Clutch position signal indicates uncommanded movement toward engagement position for 2 seconds.

FMI 1 - Data Valid But Below Normal (Most Severe): Clutch position signal indicates uncommanded movement toward disengagement position for 2 seconds.

FMI 2 – Data Erratic: LCA position out of range for 1 second.

FMI 3 – Voltage Above Normal or Shorted High: LCA Position Sensor circuit shorted to power for 1 second.

FMI 4 – Voltage Below Normal or Shorted Low: LCA Position Sensor circuit shorted to ground for 1 second.

FMI 5 – Current Below Normal or Open Circuit: LCA Position Sensor circuit open for 1 second.

FMI 6 - Current Above Normal or Grounded Circuit: LCA Position Sensor reference voltage not between 4.75V to 5.25V for 1 second.

FMI 7 - Mechanical System Not Responding: During the clutch calibration the expected fully engaged (closed) clutch position was not achieved.

FMI 8 – Abnormal Frequency: LCA Position Sensor signal abnormal pulse width for 1 second.

FMI 9 - Abnormal Update Rate: LCA Position Sensor magnet not detected for 1 second.

FMI 12 – Bad Intelligent Device: LCA Position Sensor internal self-check failure for 1 second.

FMI 13 – Out Of Calibration: LCA Position Sensor calibration required.

FMI 14 – Special Instructions: Incorrect LCA position command relative to torque command.

FMI 15 - Data Valid But Above Normal (Least Severe): During the clutch calibration the expected Torque Transfer Touch Point clutch position was not achieved.

FMI 16 – Data Valid But Above Normal (Moderately Severe): During the clutch calibration the expected Torque Transfer Touch Point clutch position was not available.

FMI 17 – Data Valid But Below Normal (Least Severe): During the clutch calibration the expected 10 Nm torque transfer clutch position was not achieved.

FMI 18 – Data Valid But Below Normal (Moderately Severe): During the clutch calibration the expected 10 Nm torque transfer clutch position was not available.

FMI 20 – Data Drifted High: LCA Position Sensor incorrectly reports the clutch is released (opened).

FMI 31 – Condition Exists: LCA Position Sensor incorrectly reports clutch is disengaged near engine idle when torque is elevated and parking brake is applied.

FMI 0, 1: LCA position values match commanded values for 10 seconds.

FMI 2: LCA position in range for 10 seconds.

FMI 3, 4, 5, 6, 8: LCA Position Sensor in range for 10 seconds.

FMI 12: LCA Position Sensor has no self-check failures for 10 seconds.

FMI 13: Successful Clutch Calibration performed.

FMI 7, 9, 14, 15, 16, 17, 18, 31: Key cycle.

FMI 20: Condition no longer exists.

FMI 0, 1:

• LCA
  • Air leak
  • Self-adjustment mechanism
• MTM
  • Air leak
• Valve Pack C
  • Stuck open clutch exhaust valve(s)
• Clutch Release System
  • Release Yoke
  • Release Bearing
• LCA Position Sensor
  • Internal failure

FMI 7:

• LCA
  • Self-adjustment mechanism
• Valve Pack C
  • Stuck open clutch fill valve(s)
• Clutch Release System
  • Release Yoke
  • Release Bearing
• LCA Position Sensor
  • Internal failure
• Incorrect engine flywheel housing
• Flywheel machined during clutch replacement

FMI 16, 17, 18:

• LCA
  • Self-adjustment mechanism
• Valve Pack C
  • Stuck open clutch fill valve(s)
• Clutch Release System
  • Release Yoke
  • Release Bearing
• LCA Position Sensor
  • Internal failure

FMI 2, 3, 4, 5, 6, 8, 20, 31:

• LCA Position Sensor
  • Internal failure
  • Damaged
• 74-Way MTM Harness
  • Wiring shorted to power, shorted to ground or open
• TCM
  • Internal failure

FMI 9:

• LCA
  • Magnet Loose
  • Magnet Detached
• LCA Position Sensor (MTM)
  • Loose
  • Damaged
• Incorrect engine flywheel housing
• Flywheel machined during clutch replacement

FMI 12, 14:

• TCM
  • Software issue
  • Internal failure

FMI 13:

• Clutch Calibration required

FMI 15:

• LCA
  • Self-adjustment mechanism
• Valve Pack C
  • Stuck open clutch fill valve(s)
• Clutch Release System
  • Release Yoke
  • Release Bearing
• LCA Position Sensor
  • Internal failure
• Incorrect engine flywheel housing
• Flywheel machined during clutch replacement

• Endurant HD Service Manual TRSM0950
• Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter - RR1029TR
• Digital Volt Ohm Meter (DVOM)