Eaton Fuller Advantage (2017) Fault Code: 86 PID: SID TBD SPN: FMI: 2 High Integrity Link Gen2 ECA: Data Erratic

Overview:
The High Integrity Link (HIL) is a Controller Area Network (CAN) high-speed proprietary data link that communicates data between the Transmission Electronic Control Unit (TECU), Electronic Clutch Actuator (ECA), and if equipped, Eaton Push Button Shift Control (PBSC). The portion of the HIL that connects the TECU to the ECA is contained within the Transmission Harness. The portion of the HIL that connects the TECU to the PBSC is contained within the Vehicle Harness. Fault Code 86 indicates a loss of communication of the HIL, 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 16 may direct users to use this troubleshooting procedure if the vehicle is equipped with a Gen2 ECA, even if Fault Code 86 was not set by the transmission. This is because some transmission software versions do not set Fault Code 86.

Detection:
The TECU monitors communication with the Shift Control Device (if equipped) and the ECA over the HIL Link. If the TECU is unable to receive any messages from the other components on the HIL, Fault Code 86 sets Active.

Conditions to Set Fault Code Active:
FMI 2 – Data Erratic: TECU does not receive any messages over the HIL for more than 5 seconds.

Fallback:
FMI 2
• Transmission may not engage a gear from neutral.
• Once the transmission down shifts to the start gear, no up shifts occur as long as the fault code is Active.
• If equipped with an Eaton PBSC:
– “F” flashes in gear display.
– Service light flashes (if equipped).
• If equipped with an Eaton Cobra Shift Lever or OEM J1939 Shift Controller:
– “F” does not flash in gear display.
– Service lamp does not flash.

Conditions to Set Fault Code Inactive:
FMI 2: Communication between components is restored for 5 seconds.

Possible Causes:
FMI 2
1) HIL
– Wiring shorted to ground, shorted to power or open
– Bent, spread, corroded or loose terminals
– Missing terminating resistor
2) Transmission Harness
– Wiring shorted to ground, shorted to power or open
– Bent, spread, corroded or loose terminals
– Seal failure in 8-Way ECA Connector
– Loss of ignition voltage to ECA before power up
3) ECA
– Bent, spread, corroded or loose terminals
– Contamination in 2-Way ECA Connector
– Contamination in 8-Way ECA Connector
– Internal failure
4) Vehicle Batteries
– Internal failure
5) Vehicle Power and Ground Supply to ECA
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground, shorted to power or open
– Seal failure on 2-Way ECA Connector
– Disconnected 2-Way ECA Connector
6) Vehicle Power and Ground Supply to TECU
– Corroded or loose power supply connections to TECU
7) TECU
– Internal failure
8) PBSC (if equipped)
– Internal failure