This Fault Code 64 troubleshooting guide is the official Eaton fault isolation procedure for an Electronic Clutch Actuator problem on the Fuller Advantage Heavy Duty automated transmission. It load tests the batteries, verifies ECA supply voltage and inspects the Clutch Release Yoke and Cross Shaft.
Official document details
| Brand | Eaton |
| Model coverage | Fuller Advantage Heavy Duty automated transmission with Gen1 ECA |
| System / group | Fuller Advantage Heavy Duty / DTCs — Diagnostic Trouble Codes |
| Publication no. | TRTS0980 |
| Revision | 2016.06.20 |
| Pages | 6 |
| File size | 0.54 MB |
| Format | |
| Language | English |
Fault Code 64 troubleshooting contents
The document is organised as a set of numbered fault isolation steps, each with a stated purpose and a clear go-to branch that sends the technician to the next step, a repair or the final verification. The main sections cover:
- Identifying a Gen1 versus Gen2 ECA installation
- Load testing each vehicle battery
- Inspecting the ECA Power Supply Harness and 40-amp fusible link
- Verifying battery voltage and polarity at the 3-Way ECA Connector
- Determining which FMI (2, 7 or 12) has set
- Inspecting the Clutch Release Yoke and Cross Shaft per CLSM0200 and verifying the repair
Applicable truck models
This Eaton fault isolation procedure applies to trucks fitted with the Fuller Advantage Heavy Duty automated manual transmission, its Electric Clutch Actuator (ECA) and Heavy-Duty ECA Clutch. Every step is performed with ServiceRanger, the Eaton diagnostic software, and cross-referenced to the wider TRTS0980 Fault Isolation Procedures manual. Manufacturer background and current service literature are published on Eaton’s official transmission website.
Who needs the Fault Code 64 troubleshooting manual
Clutch technicians diagnosing an ECA that will not actuate use this Eaton procedure to rule out the power supply and batteries before inspecting the Clutch Release Yoke and Cross Shaft for wear.
Because it is drawn straight from Eaton document TRTS0980, the page gives shop staff the same decision trees, connector pin references and pass-or-fail values the manufacturer uses, which shortens diagnosis time and supports accurate warranty documentation.
Related manuals library
The full 6-page PDF, published as Eaton document TRTS0980, is available in the DiagTechPro manuals library; a free account is required to download.
