J1939 Shift Control Device is Eaton Fault Code 13, set when the TECU loses the data-link shift request or the J1939 and hard-wired neutral signals disagree on a Fuller Advantage Heavy Duty transmission. This three-page section of publication TRTS0980 defines the SPN 751 FMI 8 and FMI 11 conditions, explains the redundant neutral request that still lets the transmission reach neutral if the link fails, and lists the harness and power-supply causes. It supports any data-link shift complaint.
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 | 0.6 MB |
| Format | |
| Language | English |
J1939 Shift Control Device 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 and Fuller Advantage Heavy Duty automated transmissions specified with the data-link shift selector, on any chassis OEM. It relies on the 38-Way Vehicle Harness Connector and the OEM in-cab shift connector, with hard-wired neutral request and confirmation signals for redundancy. Transmission data is published on the manufacturer’s official Eaton transmissions website.
Who needs this Shift Control Device manual
Technicians diagnosing a truck that will not crank or select a gear from neutral use this page to understand the J1939 message loss, the neutral-signal mismatch and the shift-selector power supply before opening the vehicle harness. Knowing that the hard-wired neutral signals remain even when the data link drops helps a technician understand why the truck can still be forced to neutral during the repair.
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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