This Eaton Fault Code 52 guide, part of Eaton Fault Isolation Procedure TRTS0980, gives a technician the ordered steps for diagnosing a Gear Position Sensor circuit fault on the Fuller Advantage X-Y Shifter. The chart checks the Rail Position circuit for a short to ground, then measures Gear Position Sensor resistance at the 38-Way and 3-Way connectors. Every lettered step lists the pin numbers, resistance windows and voltage ranges to check, and ends with a clear go-to branch so the diagnosis stays repeatable from one workshop to the next.
Official document details
| Field | Detail |
|---|---|
| Brand | Eaton |
| Model coverage | Fuller Advantage Heavy Duty automated transmissions |
| System / Group | DTCs / Fault Isolation Procedures |
| Publication no. | TRTS0980 |
| Year / Revision | 2016 / Rev. 2016.06.20 |
| Pages | 3 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Check for Active or Inactive fault codes
- Product Diagnostic (PD) Mode intermittent-failure check
- Check for a short to ground in the Rail Position circuit
- Verify Gear Position Sensor circuit resistance
- Verify which FMI set
- Measure resistance of the Gear Position Sensor at the 3-Way connector
- Verify repair
Applicable trucks for Eaton Fault Code 52
The procedure applies to Fuller Advantage Heavy Duty transmissions where the Gear Position Sensor in the X-Y Shifter reports through the 38-Way Transmission Harness Connector. Stated windows are 150-200 ohms from Pin 10 to Pin 11 and 5.5k-6.5k ohms from Pin 10 to Pin 12, with an open circuit expected from Pin 10 to ground. For manufacturer specifications and OEM cross-references, visit the Eaton Roadranger website.
Who needs this Eaton Fault Code 52 manual
Driveline technicians use this chart to separate a shorted or open Gear Position circuit from a failed X-Y Shifter or a control unit that must be replaced with the harness. Because the PDF preserves the original component names, connector callouts and measurement ranges, it also helps parts specialists confirm the correct sensor, harness or actuator before a repair order is raised.
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it, along with the related Fuller Advantage fault-code manuals listed below.
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