Eaton Fuller Hybrid Transmission Fault Code 117 – Battery Control Unit Relay Cut Request

Fault code for Eaton Hybrid Drive Systems models (MY08) EH-8E306A-U, EH-8E306A-UPG, EH-8E306A-UP, EH-8E306A-CD, EH-8E306A-T, EH-6E606B-CD, (MY09) 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. Read below to learn how to test, clear and fix fault code errors for your Freightliner, Mack, Peterbilt, Kenworth, Volvo, International, and heavy-duty truck and equipment. The high-voltage relays are located inside the Power Electronics Carrier (PEC) in the Relay Box unit. These relays are normally open when the system is off. The relays are controlled through the Inverter and monitored through a 5-volt input from the Inverter. If the relays are open the voltage is around 5 volts and when the relays are closed the voltage is around 1 volt.

Fault Code 117 – Battery Control Unit Relay Cut Request Detection

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

  • Inverter ignition voltage is greater than 7 volts and less than 16 volts.

Note: When troubleshooting an Inactive code refer to the Product Diagnostic Mode (PDM)

Conditions to Set Fault Code Active

  • FMI 3 is set when Battery Control Unit (BCU) Relay Ready CAN Flag is Active and the Relay Off signal is set high for 0.02 seconds.
  • FMI 14 is set when the Relay Cut request of the BCU is set over the CAN data link.
  • FMI 29 is set when the Relay Off signal is Active.

Fallback When Fault Code 117 is set the following conditions occur:

  • Amber “Check Hybrid” light illuminates.
  • Fault is stored in Hybrid Control Module (HCM) memory.
  • Inverter shuts high-voltage system off.
  • HCM continues to control the hybrid vehicle in a diesel-only mode.
  • Transmission defaults start gear to 1st.

Conditions to Set Fault Code Inactive

Only Inactive faults can be cleared from the Transmission Electronic Control Unit (TECU) or HCM history using ServiceRanger. The TECU automatically clears the faults from history after 200 hours and the HCM automatically clears the faults from history after the fault has been Inactive for 200 hours.

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

  • FMI 3, 29
    • PEC (MY08)
    • Inverter
    • Low Voltage Wire Harness
  • FM 14
    • PEC

Fault Code 117 – Battery Control Unit Relay Cut Request

Component Identification MY08 Systems:

Delphi 56-Way Mating Connector View

Delphi 56-Way Mating Connector View
(Inverter – Low Voltage Connector)

Deutsch 19-Way Mating connector view

Deutsch 19-Way Mating connector view
(PEC – Low Voltage Connector)

NOTE: Refer to the Eaton Hybrid Component and Connector Location for Connector Locations in MY08 Systems

Inverter-to-PEC relay -MY08

Component Identification MY09 Systems:

Duetsch 40-way mating connector view

Delphi 40-Way Mating Connector View
(Inverter – Low Voltage Connector)

Deutsch 19-Way Mating connector view

Deutsch 19-Way Mating connector view
(PEC – Low Voltage Connector)

NOTE: Refer to the Eaton Hybrid Component and Connector Location for Connector Locations in MY09 Systems.

Inverter-to-PEC relay -MY09

STEP 1. Verify FMIs present.

  1. Review and follow the Warnings & Cautions.
  2.  Retrieve Active fault codes and FMIs with ServiceRanger using the 9-Way Diagnostic Connector.
  3. Key off.
    Danger: See High-Voltage Service Shutdown and Power-Up Procedures. Follow the procedures to avoid shock, burn or death from improperly handled high-voltage.
  4. Which FMIs are present?
    • If Fault Code 117 FMI 14 is listed, test is complete. FMI 14 requires no action or replacement.
    • If Fault Code 117 FMI 3 or 29 are listed, go to Step 2.

STEP 2. Verify fault codes present.

  1. View Active faults to see if any of the following are listed: 76, 77, 78, 79, 82, 86, 101, 102, 103, 104, 105, 106, 107, 108, 109:
    • If any of the faults are listed with Fault Code 117 FMI 3, go to test for faults that are Active.
    • If none of the faults are listed with Fault Code 117 FMI 3, go to Step 3.
    • If none of the faults are listed with FMI 29, go to Step 4.

STEP 3. Verify continuity between PEC Connector and Inverter Connector.

  1. Key off.
  2. Disconnect the PEC 19-Way Connector.
  3. Disconnect the Inverter 56-Way Connector(MY08) /Inverter 40-Way Connector(MY09) .
  4. Measure the resistance from the PEC 19-Way Connector Pin 5 to the Inverter 56-Way Connector Pin 43 (MY08) / Inverter 40-Way Connector
    Pin 13:(MY09).
    Note:(MY08) Gently flex the Inverter 56-Way Connector Harness near the Connector while monitoring the resistance readings.

    • (MY08) If the resistance between Pin 5 and Pin 43 is 0–0.3 ohms, go to Step 4.
      (MY09) If the resistance between Pin 5 and Pin 13 is 0–0.3 ohms, replace the Inverter. Then go to Step 6
    • If resistance is outside of range, replace the HCM Low-Voltage Harness between the PEC and Inverter, then go to Step 6.

STEP 4. Verify continuity of Vehicle Harness and ground.

MY08

  1. Key off.
  2. Measure the resistance between the Inverter 56-Pin Connector Pin 48 to Pin 49, and Pin 47 to ground.
    • If resistance between Pin 48 and Pin 49 is 0–0.3 ohms and resistance from Pin 47 to ground is 0–0.5 ohms, go to Step 5.
    • If resistance is outside of range, replace the HCM Low-Voltage Harness between the PEC and Inverter, then go to Step 6.

MY09

  1. Key off.
  2. Remove the 40-Way Connector from the Inverter.
  3. Use an ohm meter to measure the resistance from Pin 3 to ground at the Vehicle Harness:
    • If the resistance between Pin 3 to ground is 0–0.3 ohms, replace the Inverter, then go to Step 6.
    • f resistance is outside of range, repair 40-Way Vehicle Harness, then go to Step 6.

STEP 4. Verify voltage of DC/DC Converter.

  1. Key on.
  2. View the following Data Monitor parameters:
    • PID 121 “DC/DC Converter Output Voltage.”
    • PID 165 “Battery Potential Voltage.”
      • If PID 165 is 0.5 volts less than PID 121, repair or replace the DC/DC Converter Power Supply Harness that powers the 12-Volt Battery System, then go to Step 5.
      • If PID 121 is 0.5 volts less than PID 165, repair the voltage feedback wire that goes from Pin 1 of the DC/DC Converter to Pin 19 of the HCM. Go to Step 5.

STEP 5. (MY08) Measure the resistance of the DC Interlock Low-Voltage Loop.

      1. Key off.
        Warning:See High-Voltage Service Shutdown and Power-Up Procedures. Follow the procedures to avoid shock, burn or death from improperly handled high-voltage.
      2. Disconnect the DC High-Voltage Cable at the Inverter and the PEC.
        • Measure the resistance between the Low-Voltage Interlock Pins in the DC Connector on the Inverter end. If resistance between the low-voltage Interlock Pins is 0–0.3 ohms, replace the Inverter, then go to Step 6.
        • If resistance is outside of range,  replace the DC Interlock Low-Voltage Loop, then go to Step 6.

STEP 6. Verify repair.

  1. Key off.
  2. Reconnect all connectors and the negative battery 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 117 appears, find error in testing, go to Step 1.
    • If a code other than 117 appears, see Fault Code Index List.

Any transmission part you need we have it! Same day shipping available, worldwide.

NEED FREE SUPPORT FROM ONE OF OUR EXPERTS?

CALL NOW
EMAIL US