Fault Code 27 troubleshooting is the four-page fault-isolation procedure for a clutch calibration or wear problem on the Eaton Fuller Advantage Heavy Duty transmission. This section of publication TRTS0980 checks the clutch condition and wear tab, reads the Clutch Inertia Brake Touch Point Delta in ServiceRanger against the 16.5 degree limit, runs the Low Capacity Inertia Brake test and, when a TECU has been replaced, performs the clutch adjustment routine. It keeps clutch replacement decisions evidence based.
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 | 4 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Fault Code 27 troubleshooting table of contents
- Step A – Check for active or inactive fault codes
- Step B – Inspect the condition of the clutch
- Step C – Check wear tab position on the Heavy-Duty ECA clutch
- Step D – Verify Inertia Brake Touch Point Delta with ServiceRanger
- Step E – Identify the ECA type installed
- Step F – Perform the Low Capacity Inertia Brake test
- Step G – Perform clutch adjustment with ServiceRanger
- Step V – Verify repair
Applicable truck models covered
The procedure applies to Eaton Fuller Advantage and Fuller Advantage Heavy Duty automated transmissions using the Heavy-Duty ECA clutch. It references the Heavy-Duty Clutch Service Manual CLSM0200 for caged removal, the Fuller Advantage Automated Transmission Guide TRIG0980 for pilot bearings, and Gen1 or Gen2 ECA identification. Transmission specifications are published on the manufacturer’s official Eaton transmissions website.
Who needs this Fault Code 27 troubleshooting manual
Clutch and driveline technicians use this procedure to distinguish a worn or contaminated clutch from a calibration issue, reading the Inertia Brake TP Delta and running the ServiceRanger service routines before installing a new Heavy-Duty ECA clutch.
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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