Eaton Fuller Hybrid Transmission Fault Code 84 – Shift Control Device Not Configured

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 Transmission Electronic Control Unit (TECU) is connected to the shift device, which sends driver mode selection data. The only compatible shift device is the Eaton® Push Button Shift Control (PBSC) and OEM supplied shift lever (if equipped with park). The TECU checks the vehicle for the type of shift device during the first power up.

Fault Code 84 – Shift Control Device Not Configured Detection

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

  • TECU ignition voltage is greater than 7 volts and less than 16 volts.
  • TECU System Battery Voltage Low Fault is Inactive.
  • TECU is being powered up for the first time and no shift device has been configured.

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

Conditions to Set Fault Code Active

  • FMI 13 is set when the TECU powers-up the first time and fails to recognize any valid shift device connected to the vehicle within five seconds.

Fallback When Fault Code 84 is set the following conditions occur:

  • Red “Service” light may or may not come on depending on the failure.
  • Fault is stored in TECU memory.
  • TECU changes to “AutoShift Fallback” mode.
  • The engine does not crank.

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 13
    • OEM Wiring Harness between TECU and shift control device is disconnected
    • PBSC
  • FMI 14
    • OEM Wiring Harness between TECU and shift control device is disconnected
    • Shift Lever

Fault Code 84 – Shift Control Device Not Configured Test

Component Identification:

TECU - Vehicle Interface Connector

Harness Front View
(TECU – Vehicle Interface Connector)

Push Button Shift Control 30-Way Connector

Push Button Shift Control 30-Way Connector

4-Pin Park Pawl Actuator Connector

4-Pin Park Pawl Actuator Connector

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

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

TECU PBSC Shift Lever Controller connector

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