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Eaton Transmission Fault Code 64 - ECA Fault

Eaton Transmission PDF manuals
Eaton Transmission Fault Codes

Overview

The Electric Clutch Actuator (ECA) controls the position of the clutch assembly. A main power 3-Way Connector supplies electricity to the ECA directly from the 12-volt battery. The ECA also connects to the Hybrid Control Module (HCM) and the Engine Speed Sensor through an 8-Way Connectors. The ECA communicates with the HCM and Engine Speed Sensor over the proprietary Controller Area Network (CAN) Data Link to change position, show faults or include other operational information.

Detection

Fault is detected when:

• ECA ignition voltage is greater than 8.5 volts.

• ECA Battery Voltage is greater than 7.8 when ignition voltage is greater than 8.5 volts.

Conditions to Set Fault Code Active

The following conditions may set the fault Active:

• FMI 12 is set for an internal ECA failure.

• FMIs 22–28 are set for excessive motor current or incorrect shaft position.

• FMI 0 is set when theECA Inverter temperature exceeds 266 °F (130 °C).

• FMI 13 is set when the ECA can not find the Clutch Release Bearing touch point after 3 attempts.

Fallback

When Fault Code 64 is set the following conditions occur:

• Red “Stop Hybrid” light illuminates for FMI 12, 21, 22, 23, 24, 26, 27, or 28.

• Amber “Check Hybrid” light illuminates for FMI 0, 13, or 25.

• Fault is stored in HCM memory.

• If the fault occurs while driving, the ECA either maintains current clutch position or moves to the last position commanded by the HCM.

• If the fault occurs atpower up, the vehicle does not crank.

Possible Causes

This fault code can be caused by any of the following:

• FMI 12

       - ECA

• FMI 21–28

       - Excessive debris buildup on/around the ECA.

       - Binding cross-shafts.

• FMI 0

       - Missing exhaust shieldor exhaust to close to ECA.

 

Fault Code 64 - ECA Fault

A) Purpose: Verify FMIs present.

1. Retrieve Active fault codes and FMIs with Service Ranger using the 9-Way Diagnostic Connector.

2. Which FMIs are present?

       • If FMI 0 is present, check for damaged or missing exhaust shielding on the ECA. Replace or reroute exhaust to reduce internal ECA temperature, then go to Step V.

       • If FMI 12 is listed, replace the ECA. See the Electric Clutch Actuator Removal and Installationprocedure in TRSM2000, then go to Step V.

       • If FMIs 21–28 are listed, go to Step B.

B) Purpose: Verify integrity of ECA motor.

1. Disconnect the 12-volt battery cables.

2. Remove the ECA from the Clutch Housing. See the Electric Clutch Actuator Removal and Installation procedure in TRSM2000.

3. Check the ECA and Clutch Housing for debris build up.

4. Rotate the Clutch Release Shaft by hand to check for binding.

       • If no excessive debris is found, and Clutch Release Shaft rotates without binding, replace ECA. See the Electric Clutch Actuator Removal and Installation procedure in TRSM2000, then go to Step V.

       • If excessive debris is found around ECA or inside the Clutch Housing, removedebris build up around ECA area.

       • If the Clutch Release Shaft binds when rotated, replace or repair Clutch Release Shaft and upper bushing as needed for proper shaft rotations, then go to Step V.

V) Purpose: Verify repair.

1. Key off.

2. Reconnect all connectors and the negative battery cable.

3. Key on.

4. Clear codes. See “Fault Code Retrieval and Clearing”.

5. Drive the vehicle and attempt to recreate the code.

6. Check for codes. See “Fault Code Retrieval and Clearing”.

   • If no codes appear, test is complete.

   • If Fault Code 64 appears, find error in testing, go to Step A.

   • If a code other than 64 appears, go to “Fault Code Isolation Procedure Index”.

Comments: 0
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