HIL Shift Device Communication is Eaton Fault Code 15, set when the TECU loses contact with the Push Button Shift Control device over the High Integrity Link. This three-page section of publication TRTS0980 defines the J1939 SPN 751 FMI 9 condition, the five-second detection window, the fallback that limits the transmission to down shifts and the wiring causes. It is the definition companion to the separate Fault Code 15 troubleshooting steps.
Official document details
| Brand | Eaton |
|---|---|
| Model coverage | Fuller Advantage & Fuller Advantage Heavy Duty automated transmission |
| System / Group | DTCs – Fault Isolation Procedures |
| Publication no. | TRTS0980 |
| Year / Revision | 2016 (Rev. 2016.06.20) |
| Pages | 3 |
| File size | 0.7 MB |
| Format | |
| Language | English |
HIL Shift Device Communication table of contents
- Overview and fault description
- Detection method
- Conditions to set the fault code active
- Fallback and dashboard symptoms
- Conditions to set the fault code inactive
- Possible causes
- Component identification
Applicable truck models covered
This definition covers Eaton Fuller Advantage Heavy Duty automated transmissions specified with the Eaton Push Button Shift Control device (PBSC) and the 38-Way Vehicle Harness. The link between the TECU and PBSC runs inside the vehicle harness, while the ECA link runs in the transmission harness, and pin-outs are OEM proprietary. Transmission model details are published on the manufacturer’s official Eaton transmissions website.
Who needs this Shift Device Communication manual
Technicians facing a truck stuck in gear or that will not select a start gear use this page to understand the loss of communication, the terminating-resistor requirement and the power and ground supply to the shift controller before opening the harness. It also records the ten-second window that must pass before the code clears, and points technicians to the matching troubleshooting steps for the resistance and continuity measurements.
The complete PDF, published under Eaton document TRTS0980, is available in the DiagTechPro manuals library; a free account is required to download it.
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