The Endurant XD Series transmissions are equipped with a Linear Clutch Actuator (LCA) Position Sensor to monitor clutch position. The LCA is mounted to the Mechatronic Transmission Module (MTM) and pneumatically controls the clutch position. The LCA contains a magnet that allows the LCA Position Sensor to sense clutch position and provide it to the Transmission Control Module (TCM). The LCA Position Sensor is mounted in the MTM and connected to the TCM at the 74-way Transmission Harness Connector.

FMI 0 - Data Valid But Above Normal (Most Severe): Uncommanded clutch movement toward engaged position for 2 seconds.

FMI 1 - Data Valid But Below Normal (Most Severe): Uncommanded clutch movement toward disengaged position for 2 seconds.

FMI 2 – Data Erratic: LCA Position Sensor signal 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 a clutch calibration the expected fully engaged (closed) clutch position was not achieved.

FMI 8 – Abnormal Frequency: LCA Position Sensor signal frequency out of range for 1 second.

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

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

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

FMI 14 – Special Instructions: Inappropriate clutch position command relative to torque command.

FMI 15 - Data Valid But Above Normal (Least Severe): During a LCA Position Sensor calibration the Torque Transfer Touch Point clutch position was out of range.

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

FMI 17 – Data Valid But Below Normal (Least Severe): During a LCA Position Sensor calibration the 10 Nm torque transfer clutch position was out of range.

FMI 20 – Data Drifted High: LCA Position Sensor incorrectly reports clutch is disengaged near engine idle when torque is elevated and service brake is applied.

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: Clutch position in range for 10 seconds.

FMI 2: LCA Position Sensor signal in range for 10 seconds.

FMI 3: LCA Position Sensor circuit not shorted to power for 10 seconds.

FMI 4: LCA Position Sensor circuit not shorted to ground for 10 seconds.

FMI 5: LCA Position Sensor circuit not open for 10 seconds.

FMI 6: LCA Position Sensor reference voltage in range for 10 seconds.

FMI 8: LCA Position Sensor signal frequency in range for 10 seconds.

FMI 9: LCA magnet detected for 10 seconds.

FMI 12: LCA Position Sensor circuit self-checks in range for 10 seconds.

FMI 13: Successful LCA Position Sensor calibration.

FMI 14, 20, 31: Key cycle and fault condition no longer exists.

FMI 7, 15, 16, 17: During LCA position sensor calibration clutch position value was available and in range.

FMI 0, 1:

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

FMI 7

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

FMI 15, 16, 17:

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

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

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

FMI 9:

• LCA
  • Magnet Loose
  • Magnet Detached
• MTM - LCA Position Sensor
  • Loose
  • Damaged
• Incorrect engine flywheel housing

FMI 12, 14:

• TCM
  • Software issue
  • Internal failure

FMI 13:

• Clutch calibration required

• Endurant XD Service Manual TRSM0960
• Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter - RR1029TR
• Digital Volt Ohm Meter (DVOM)