This Fault Code 43 troubleshooting page from the Eaton Fuller Advantage Heavy Duty service set guides a technician through the fault isolation procedure for the Range Solenoid Valve circuit. Published as TRTS0980, it lists the continuity and short checks that pinpoint the harness, solenoid valve or TECU.
Official document details
| Brand | Eaton |
| Model coverage | Fuller Advantage Heavy Duty (and Fuller Advantage) automated transmissions |
| System / Group | Fuller Advantage Heavy Duty / DTCs |
| Publication no. | TRTS0980 |
| Year / Revision | 2016.06.20 (© 2016 Eaton) |
| Pages | 6 |
| File size | 0.76 MB |
| Format | |
| Language | English |
Document table of contents
- Step A — Check for Active or Inactive fault codes
- Step B — Product Diagnostic (PD) Mode intermittent check
- Step C — Verify continuity of the Range Solenoid circuit at the TECU
- Step D — Check for short to ground
- Step E — Check for short to power
- Step F — Verify Range Solenoid Valve high and low circuits
- Steps G and V — Verify fault status and repair
Applicable truck models
The procedure covers Eaton Fuller Advantage Heavy Duty transmissions equipped with the electric-over-air Range Solenoid Valve controlled by the TECU. Model listings and specifications are published on the Eaton Vehicle Group official website.
Fault Code 43 troubleshooting workflow
The manual measures resistance between 38-Way Connector Pins 28-6 and 34-6 (9–16 ohms each), then checks for shorts to ground and to power at the 4-Way Diagnostic Connector. Valve-body readings across Pins A-C and B-C (9–16 ohms) confirm whether to replace the Transmission Harness or the Range Solenoid Valve, with repair verified in ServiceRanger.
Who needs this Fault Code 43 troubleshooting manual
Workshop technicians chasing a range-shift electrical complaint use this sheet to follow Eaton’s exact resistance ranges and connector pins, so the harness, solenoid valve or TECU is replaced only after the readings prove it.
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