UltraShift PLUS
TRTS0940 EN-US
|
July 2024 - A

Fault Code 65: Gen2 ECA Speed Sensor

J1587: MID 130 PID 190 FMI 2, 3, 4, 5

J1939: SA 3 SPN 5052 FMI 2, 3, 4, 5

Overview

The UltraShift PLUS transmission is equipped with an Electronic Clutch Actuator (ECA) Speed Sensor that provides a secondary engine speed signal to the Transmission Electronic Control Unit (TECU). The ECA Speed Sensor is installed in the clutch housing. The ECA broadcasts the ECA Speed Sensor signal to the TECU through the High Integrity Link (HIL) contained within the Transmission Harness.

The TECU uses the ECA Speed Sensor signal to determine engine speed when the J1939 engine speed signal is not available. Early models have a thread-in ECA Speed Sensor installed in the flywheel housing. Fault Code 95 indicates either a loss of the signal or an electrical issue with the ECA Speed Sensor, but is specific to systems that use a Gen2 ECA. Troubleshooting for this procedure is specific to the Gen2 ECA and associated harnesses.

Note: The troubleshooting procedure for Fault Code 65 may direct users to use this troubleshooting procedure if the vehicle is equipped with a Gen2 ECA, even if Fault Code 95 was not set by the transmission. This is because some transmission software versions do not set Fault Code 95.

Detection

The TECU monitors the ECA Speed Sensor signal and compares the sensor reading with the J1939 Engine Speed signal to determine sensor validity. The TECU also monitors the ECA Speed Sensor electrical circuit for any short or open circuits.

Conditions to Set Fault Code Active

The system can detect ECA Speed Sensor faults when one of the following conditions is present for 1 second or longer:

FMI 2 – Data Erratic: TECU detects Engine speed over J1939 at idle, but does not detect Transmission clutch input speed or the TECU detects Transmission clutch input speed at idle, but does not detect Engine speed over J1939.

FMI 3 – Voltage Above Normal or Shorted High: ECA detects a short to power in the ECA Speed Sensor signal circuit.

FMI 4– Voltage Below Normal or Shorted Low: ECA detects a short to ground in the ECA Speed Sensor signal circuit.

FMI 5– Current Below Normal or Open Circuit: ECA detects an open on the ECA Speed Sensor signal circuit.

Fallback

All FMIs

  • “F” flashes in gear display.
  • Service light flashes (if equipped).
  • No fallback mode is associated with this fault. TECU uses the vehicle engine speed signal, broadcast over J1939, to operate the transmission.

Conditions to Set Fault Code Inactive

All FMIs: TECU detects the ECA Speed Sensor signal for 2 seconds.

Possible Causes

FMI 2:

  • Engine Speed Sensor
    • Missing or inconsistent engine speed signal to the TECU
  • Clutch
    • Broken or missing or Clutch Cover lugs (Push-In ECA Speed Sensor)
  • Engine Flywheel
    • Contaminated, worn, broken or missing flywheel ring gear teeth (Thread-In ECA Speed Sensor)
  • ECA Speed Sensor
    • Debris build-up on ECA Speed Sensor
    • Mis-adjusted Thread-In ECA Speed Sensor
    • Physical Damage
    • Internal Failure
  • Transmission Harness
    • Bent, spread, corroded or loose terminals
  • ECA
    • Internal Failure

FMI 3:

  • Transmission Harness
    • Wiring shorted to power
  • ECA
    • Internal Failure

FMI 4:

  • ECA Speed Sensor
    • Physical Damage
    • Internal Failure
  • Transmission Harness
    • Wiring shorted to ground
  • ECA
    • Internal Failure

FMI 5:

  • ECA Speed Sensor
    • Physical Damage
    • Internal Failure
  • Transmission Harness
    • Bent, spread, corroded or loose terminals
    • Wiring open
  • ECA
    • Internal Failure

Component Identification

_Graphics/LineArt/TRTS0940_FC95_ID2.png

1. Transmission Electronic Control Unit (TECU)

2. 38-Way Transmission Harness Connector

3. ECA Shield

4. Electronic Clutch Actuator (ECA)

5. 8-Way ECA Connector

_Graphics/LineArt/TRTS0940_FC95_Wiring.png

1. Transmission Electronic Control Unit (TECU)

2. 38-Way Transmission Harness Connector

3. 8-Way Gen2 ECA Connector

4. 2-Way Gen2 ECA Speed Sensor Connector Body

5. 2-Way Gen2 ECA Speed Sensor

_Graphics/LineArt/Wiring-Key-EPS.png

Fault Code 65 Troubleshooting Gen2 ECA

A
Purpose:Check for Active or Inactive fault codes.

  1. Record the transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity Report created during the Diagnostic Procedure.

  2. Key on with engine off.

  3. Connect ServiceRanger.

  4. Update transmission and ECA software to latest available level, if not completed during the Diagnostic Procedure.

    Notice
    To avoid damaging the TECU, use an Eaton-approved communications adapter and ensure all satellite systems are disabled before updating software.
B
Purpose: Verify resistance of Transmission Harness and ECA Speed Sensor circuit and not shorted to ground.

  1. Key off.

  2. Disconnect 8-Way Gen2 ECA Connector.

  3. Inspect 8-Way Gen2 ECA Connector body for damage and bent, spread, corroded or loose terminals.

  4. Measure resistance between 8-Way Gen2 ECA Connector Pin 3 and Pin 6. Record reading(s) in table based on configuration.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA-Pin3and6.png

  5. Measure resistance between 8-Way Gen2 ECA Connector Pin 6 and ground. Record reading(s) in table.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA-Pin6andGround.png

  6. Compare reading(s) in table.

ECA Speed Sensor ConfigurationPinsRangeReading(s)
Transmission Clutch Housing3 to 62.0k–4.5k Ohms
Engine Flywheel Housing3 to 6140–180 Ohms
Both6 to groundOpen Circuit (OL)
C
Purpose:Verify resistance of ECA Speed Sensor circuit and not shorted to ground.

  1. Key off.

  2. Disconnect 2-Way Gen2 ECA Speed Sensor Connector.

  3. Inspect 2-Way Connector body for damage and bent, spread, corroded or loose terminals.

  4. Measure resistance between 2-Way Gen2 ECA Speed Sensor Connector Pin 1 and Pin 2. Record reading(s) in table based on configuration.

    _Graphics/LineArt/TRTS0940_FC86_Gen2ECA2-Way-Pin1and2.png

  5. Measure resistance between 2-Way Gen2 ECA Speed Sensor Connector Pin 2 and ground. Record reading(s) in table.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA2-Way-Pin2andGround.png

  6. Compare reading(s) in table.

ECA Speed Sensor ConfigurationPinsRangeReading(s)
Transmission Clutch Housing1 to 22.0k–4.5k Ohms
Engine Flywheel Housing1 to 2140–180 Ohms
Both2 to groundOpen Circuit (OL)
D
Purpose:Compare J1939 engine speed RPM and transmission clutch input speed RPM.

  1. Set vehicle parking brake and chock wheels.

  2. Key on with engine on at idle.

  3. Connect ServiceRanger.

  4. Select “Data Monitor”.

  5. Select “Speed”.

  6. Select “Engine speed” and add parameter “Engine -190”.

  7. Select “Transmission clutch input speed” and add parameter “Transmission - 5052”.

  8. Monitor vehicle tachometer and record engine RPM value in table.

  9. Monitor ServiceRanger and record “Engine speed” RPM value in table.

  10. Monitor ServiceRanger and record “Transmission clutch input speed” RPM value in table.

    Notice
    Do not depress the service brake when recording RPM readings.

  11. Compare reading(s) in table.

Engine Speed Signal SourceRangeReading(s)
Vehicle TachometerIdle RPM
Parameter “Engine-190”Within 150 RPM of Engine Idle RPM
Parameter “Transmission- 5052”Within 150 RPM of Engine Idle RPM
E
Purpose:Identify engine speed signal that is out of range.

  1. Compare reading(s) recorded in Step D table.

  • If parameter “Engine - 190” RPM is out of range of Vehicle Tachometer Idle RPM, refer to OEM guidelines for repair or replacement of OEM Engine Speed Sensor signal. Go to Step V

  • If parameter “Transmission - 5052” RPM is out of range of Vehicle Tachometer Idle RPM, Go to Step H

F
Purpose:Check for Active or Inactive fault codes.

  1. Retrieve fault code(s) recorded in Step A.

  • If Fault Code 65 with FMI 2, 4 or 5 is Inactive, Go to Step G

  • If Fault Code 65 with FMI 2, 4 or 5 is Active, Go to Step H

G
Purpose:Use Product Diagnostic (PD) Mode to locate intermittent failures.

  1. Set parking brake and chock wheels.

  2. Place transmission in PD Mode. See more about Product Diagnostic (PD) Mode.

    Note: Transmission does not enter PD Mode when Active fault codes exist.

    _Graphics/LineArt/PD_GearDisplay.png

  3. Wiggle wiring and connections of the Transmission Harness from the 2-Way Gen2 ECA Speed Sensor to the 8-Way Gen2 ECA Connector. Look for signs of pinched or chafed wiring. Verify all connections are clean and tight.

  4. Exit PD Mode by powering down.

    Notice
    Allow 2–3 minutes for the TECU to perform a complete power-down sequence before proceeding.
H
Purpose: Verify resistance of Transmission Harness and ECA Speed Sensor circuit and not shorted to ground.

  1. Key off.

  2. Disconnect 8-Way Gen2 ECA Connector.

  3. Inspect 8-Way Gen2 ECA Connector body for damage and bent, spread, corroded or loose terminals.

  4. Measure resistance between 8-Way Gen2 ECA Connector Pin 3 and Pin 6. Record reading(s) in table based on configuration.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA-Pin3and6.png

  5. Measure resistance between 8-Way Gen2 ECA Connector Pin 6 and ground. Record reading(s) in table.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA-Pin6andGround.png

  6. Compare reading(s) in table.

ECA Speed Sensor ConfigurationPinsRangeReading(s)
Transmission Clutch Housing3 to 62.0k–4.5k Ohms
Engine Flywheel Housing3 to 6140–180 Ohms
Both6 to groundOpen Circuit (OL)
I
Purpose:Verify resistance of ECA Speed Sensor circuit and not shorted to ground.

  1. Key off.

  2. Disconnect 2-Way Gen2 ECA Speed Sensor Connector.

  3. Inspect 2-Way Connector body for damage and bent, spread, corroded or loose terminals.

  4. Measure resistance between 2-Way Gen2 ECA Speed Sensor Connector Pin 1 and Pin 2. Record reading(s) in table based on configuration.

    _Graphics/LineArt/TRTS0940_FC86_Gen2ECA2-Way-Pin1and2.png

  5. Measure resistance between 2-Way Gen2 ECA Speed Sensor Connector Pin 2 and ground. Record reading(s) in table.

    _Graphics/LineArt/TRTS0940_FC95_Gen2ECA2-Way-Pin2andGround.png

  6. Compare reading(s) in table.

ECA Speed Sensor ConfigurationPinsRangeReading(s)
Transmission Clutch Housing1 to 22.0k–4.5k Ohms
Engine Flywheel Housing1 to 2140–180 Ohms
Both2 to groundOpen Circuit (OL)
J
Purpose:Verify type of ECA Speed Sensor.

  1. Inspect ECA Speed Sensor.

  • If equipped with Clutch Housing Push-In ECA Speed Sensor, Go to Step K

  • If equipped with Flywheel Housing Thread-In ECA Speed Sensor, Go to Step M

K
Purpose:Inspect Push-In Clutch Housing ECA Speed Sensor.

  1. Key off.

  2. Verify the Push-In ECA Speed Sensor is properly seated and installed in the Transmission Clutch Housing.

  3. Remove ECA Speed Sensor. Inspect for signs of damage or debris build-up.

L
Purpose:Inspect Clutch Cover lugs.

  1. Key off.

  2. Remove single bolt for clutch housing access cover.

  3. Inspect Clutch Cover for any damaged or missing lugs.

M
Purpose:Inspect Flywheel Housing Thread-In ECA Speed Sensor and adjustment.

  1. Key off.

  2. Verify the Thread-In ECA Speed Sensor is properly installed and adjusted in the Engine Flywheel Housing.

    Note: Reference TRSM0930, Thread-In ECA Speed Sensor, Service Procedures.

  3. Remove ECA Speed Sensor. Inspect for signs of debris build-up or damage.

N
Purpose:Inspect flywheel for damage.

  1. Key off.

  2. Inspect Engine Flywheel Ring Gear for debris, wear or damage.

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. Clear fault codes using ServiceRanger.

  5. Drive vehicle and attempt to reset the code or duplicate the previous complaint.

  6. Check for fault codes using ServiceRanger.