Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (2024)

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault2023-05-24T02:02:29-04:00

Fault code for Eaton Hybrid Drive Systems models EH-8E406A-U/P, EH-8E406A-UP, EH-8E406A-UPG, EH-8E406A-CD, EH-8E406A-CDG, EH-8E406A-CDR, EH-8E406A-T, EH-6E706B-CD, EH-6E706B-P and EH-6E706B-UPG. Controller Area Network (CAN) is a high-speed twisted pair 500K proprietary data link with one 120 ohm resistor at each end of the link. Hybrid Control Module (HCM) is connected to the CAN Data Link at the 38-Way Connector. This link is used to transmit information to the HCM as well as communicate or receive data from the other modules on the network like the Electric Clutch Actuator (ECA).

Fault Code 19 – CAN ECA Message Fault (HCM) Detection

The following preconditions must be met before the system detects the fault:

  • HCM ignition voltage is greater than 7 volts and less than 16 volts.
  • HCM CAN Communication Link Fault is not Active.

Conditions to Set Fault Code Active

  • FMI 9: Set when the HCM fails to receive ECA data (e.g., clutch position) for at least 30 consecutive messages, and it is still communicating with other modules on CAN.
  • FMI 2: Only Active in PDM and is set when the HCM does not receive 3 consecutive messages from the ECA.

Fallback When Fault Code 19 is set the following conditionsoccur:

  • Red “Stop Hybrid” light displays.
  • Fault is stored in HCM memory.
  • Operation mode changes to AutoShift only mode.
  • If the fault sets at power up, engine does not crank.
  • Electric motor/generator assist and regeneration are disabled; however, the high-voltage relays remain powered.
  • If the fault occurs while driving, the ECA will either maintain current clutch position or move to the last position commanded by the HCM.
  • Transmission defaults start gear to 1st.

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

  • FMI 9, 2
    • CAN Data Link
    • No power or ground to ECA
    • ECA

Fault Code 19 – CAN ECA Message Fault (HCM) Test

Component Identification:

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (1)

Harness Front View
(HCM – Vehicle Interface Connector)

NOTE: Refer to the Eaton Hybrid Component and Connector Location for Connector Locations.

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (3)

Warnings & Cautions

Danger: Danger indicates you will be severely injured orkilled if do not follow the indicated procedure.
Warning: Warning indicates an immediate hazard, whichcould result in severe personal injury if you do not followthe indicated procedure.
Caution: Caution indicates vehicle or property damagecould occur if you do not follow the indicated procedure.

Note: Note indicates additional detail that will aid in thediagnosis or repair of a component/system.

Follow the specified procedures in the indicated order to avoid personal injury:

1. If the high-voltage cones are around the vehicle and the lockout is installed on the PEC, the only person that should be allowed to start the vehicle is the person who signed the lockout tag.
2. Before working on a vehicle or leaving the cab while the engine is running, you should place the shift lever in “N” set the parking brake, and block the wheels.
3. For safety reasons, always engage the service brakes prior to selecting gear positions from “N.”
4. Before starting a vehicle always be seated in the driver’s seat, select “N” on the shift control, and set the parking brakes.
5. In vehicles with ePTO, the engine and/or
Motor/Generator can start in ePTO mode. Never perform any maintenance or work on vehicle, while in this mode.
6. 12-Volt Battery positive (+) and negative (-) must be disconnected prior to any welding on any Hybrid equipped vehicle.

Caution: Follow the specified procedures in the indicated order to avoid equipment malfunction or damage.
Caution: Do not release the parking brake or attempt toselect a gear until the air pressure is at the correct level.
Caution: To avoid damage to the transmission duringtowing place the shift lever in “N” and lift the drive wheels off the ground or disconnect the driveline.

High-Voltage Warnings & Cautions

  • Use CO2 or Dry Chemical Fire Extinguishers.
  • The high-voltage wiring is covered in orange insulation or convoluted tubing and marked with warning labels at the connectors.
  • All Eaton® Hybrid Diesel/Electric vehicles will be marked ‘Hybrid’ on the outside of the vehicle, along with the shift label on the dash.
  • Refer to OEM for specific location of chassis mounted hybrid components.
  • Do NOT cut into the orange high-voltage cables.
  • Do NOT cut into or open the PEC.
  • Do NOT cut into or open the DC/DC Converter.
  • Do NOT cut into or open the Inverter.

A buffer zone must be set up and high-voltage insulated rubber gloves (class 0 with leather protectors) are required prior to working on high-voltage. Failure to follow these instructions may result in severe personal injury or death.
The rubber-insulated gloves that must be worn while working on the high-voltage system are class 0 with leather protectors. The rubber gloves should be tested before EVERY use following the rubber insulation gloves testing procedure found in “Diagnostic Tools/Service Publications” on page 6. Failure to follow these instructions may result in severe personal injury or death.
Before inspecting or working on any high-voltage cables or components the “High-Voltage Service Shutdown and Power-Up Procedure” on page 4 should be followed. Failure to follow these instructions may result in severe personal injury or death.
The Lockout and Tagout devices should only be removed by the technician that placed the Lockout and Tagout devices on the vehicle. Failure to follow these instructions may result in severe personal injury or death.
High-voltage rubber insulated gloves (class 0 with leather protectors) must be worn when working on any
high-voltage cables. The “High-Voltage Service Shutdown and Power-Up Procedure” on page 4 must be followed prior to removing any high-voltage cables. Failure to follow these instructions may result in severe personal injury or death.
High-voltage cables and wiring are orange and contain a warning label at the connectors. High-voltage components are marked with a label. High-voltage rubber insulated gloves (class 0 with leather protectors) must be used when working on any of these components. Failure to follow these instructions may result in severe personal injury or death.

High-Voltage Service Shutdown Procedures

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (4)1. Follow “High-Voltage Work Area” procedure.
2. Locate the red PEC Service Switch on the front of the PEC and push switch off.
3. Remove the Service Switch Cover and install the Lockout Bracket (J48506).
4. Fasten tag to the Lockout Bracket.
5. Ensure the PEC Service Switch can not move from the off position.
6. Allow the system to set for a minimum of 5 minutes to discharge high voltage.
7. Connect ServiceRanger and view the Data Monitor PID 116 called “High-Voltage Battery Potential.” Use SPN 520323 for J1939 connection “Battery Voltage RB” (Relay Box).
8. The voltage should be 30 volts or less. If the voltage is above 30 volts, do not work on the vehicle and contact Eaton® at 1-800-826-HELP (4357).
9. Turn ignition key off and proceed to repair or troubleshooting step.
Note: The voltage drops to zero when the key is off.

High-Voltage Service Power-Up Procedure

1. Install all high-voltage connectors into their locked positions.
2. If you are the person working on the vehicle, remove the Lockout Bracket and tag.
3. Reinstall the Lockout Bracket over the Service Switch.
4. Pull the Service Switch out and let vehicle set for 2 minutes.
5. Start vehicle when appropriate.

Eaton Hybrid Component and Connector Location

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (5)

Eaton Hybrid Component and Connector Location MY09 Systems

Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (6)

STEP 1. Check for Active or Inactive fault code status and perform Electrical Pretest and Hybrid Electrical Pretest.

  1. Retrieve Active fault codes and FMIs with ServiceRangerusing the 9-Way Diagnostic Connector.
  2. Perform Electrical Pretest.
    • If no issues found during the Electrical Pretest, go to Step 2.
    • If issue was repaired during the Electrical Pretest, go to Step 7.

STEP 2. Verify continuity of ECA circuitry.

  1. Key off
  2. Disconnect ECA 8-Way Connector.
  3. Check ECA 8-Way Connector for water intrusion and corrosion.
  4. Measure resistance between ECA 8-Way Connector Pin A and Pin B.
    Note: Make sure the volt/ohm meter is on the proper scale (around 200 ohm scale)
      • If resistance between Pin A and Pin B is between 50–70 ohms, go to Step 3.
      • If resistance is outside of range, repair CAN Data Link Harness, then go to Step 7.

STEP 3. Verify continuity of ECA circuitry.

  1. Key off.
  2. Disconnect ECA 8-Way Connector 2.
  3. Measure resistance between Pin A to ground and Pin B to ground.
    • If resistance is for either pin is 7k,go to Step 4.
    • If result is 0-100 ohms, repair CAN Wire Harness. After repairs are made, go to Step 7.

STEP 4. Verify CAN Wire Harness is wired correctly.

  1. Key off
  2. Disconnect ECA 8-Way Connector.
  3. Check ECA 8-Way Connector for water intrusion and corrosion.
  4. Measure resistance between the following pins. Determine if the resistance is within the range listed.
    • Pin A of the 9-way diagnostic connector to Pin H (under the dash) should be 0–0.3 ohms.
    • Pin A of the 9-way diagnostic connector (under the dash) to 19-way PEC Connector Pin 1 should be 0–0.3 ohms.
    • Pin B of the 9-way diagnostic connector (under the dash) to Pin J should be 0–0.3 ohms.
    • Pin B of the 9-way diagnostic connector (under the dash) to Pin 2 should be 19-way PEC Connector 0–0.3 ohms.
      • If the measurements are outside the range, repair CAN wiring harness. After repairs are made, go to Step 7.
      • If the measurements are within the range, go to Step 5.

STEP 5.Verify voltage of the ECA.

  1. Key on.
  2. Check for 12-volt power on ECA 8-way connector Pin H with a digital volt/ohm meter.
    • If voltage is present,skip to #4.
    • If voltage is lower than 10 volts or there is no voltage, go to Step 6.
  3. Remove ECA 3-way connector and check for water intrusion and corrosion.
  4. Check for voltage at ECA 3-way connector Pin C and Pin B with a digital volt/ohm meter.
    • If Pin C and Pin B both have voltage, replace the ECA. See the Electric Clutch Actuator Removal and Installation procedure in TRSM2000. After repairs are made, go to Step 7.
    • If Pin C and Pin B have less than 10 volts or no voltage, skip to #5.
  5. Check Pin C for battery voltage, use negative battery post for ground. Check Pin B for ground, use positive battery post for 12 volt.
    • If problem found using battery post, repair ECA wiring harness.
    • If no problem found, find error in testing, go to Step 1.

STEP 6. Measure continuity between HCM and ECA

  1. Key off.
  2. Remove HCM S2 wire connector.
  3. Measure resistance between HCM S2 connector Pin 13 and ECA 8-way Pin H.
    • If resistance is 0–0.3, replace HCM (see Hybrid Control Module (HCM) Removal and Installation). After repairs have been made, go to Step 7.
    • If resistance is outside range, repair wiring harness.

STEP 7. Verify repair.

  1. Key off.
  2. Reconnect all connectors and negativebattery cable.
  3. Key on.
  4. Clear codes, see Clear Inactive Faults.
  5. Drive the vehicle and attempt to reset the code.
  6. Check for codes, see View Active and Inactive Faults.
    • If no codes, test is complete.
    • If fault Code 19 appears, find error in testing, go to Step 1.
    • Ifa code other than 19 appears, see Fault Code Index List.

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Eaton Fuller Hybrid Transmission Fault Code 19 CAN ECA Message Fault (2024)
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