Description

Eaton Fuller AC-AS1, AS2-ASX, ASW, CEEMAT, CEM1 2004 Diagnostics Manual

You have a transmission throwing codes, and you’re stuck flipping through aftermarket junk that lists the wrong fault numbers. I’ve been there. The Eaton Fuller AC-AS1, AS2-ASX, ASW, CEEMAT, CEM1 2004 Diagnostics Manual cuts that crap out. This is the factory fault code chart book – 48 pages of actual OEM data, not some reprint that misses half the FMI codes. If you are working on any of these automated transmissions, or the ABS systems tied to them, you need this on your bench.

MID 128 and MID 130: What These Codes Mean

The manual is organized by MID (Message Identifier). MID 128 covers engine controllers from CAT, Cummins, Detroit Diesel, International, and Mack. MID 130 covers transmission controllers – that’s your Eaton units: AC-AS1, AS2-ASX, ASW, CEEMAT, CEM1, plus others like DM2 and Lightning. You get PID/SID and FMI numbers for each fault, with a plain-English description. Page 3 shows a sample chart: PID 110, FMI 003 gives fault code 27 – high coolant temperature warning. That’s the kind of direct lookup you need.

Fault Code Charts: How to Use This Manual

Flip to the “How To Use This Manual” section on page 3. The process is simple: find your MID and model, then go to the page number listed. For example, MID 130 – Eaton AC-AS1 starts on page 17. Each chart lists PID/SID, FMI, fault code number, and description. The manual also includes a sample display showing how the tool will read out “128 PID 110 FMI 003”. No guesswork. You cross-reference the display with the chart and you know exactly what sensor or circuit is bad.

ABS Systems Covered: MID 136 and MID 137

ABS is not an afterthought here. The manual dedicates pages 26 through 41 to MID 136 (tractor ABS) and MID 137 (trailer ABS). You get Bendix, Eaton, Wabco (pneumatic and hydraulic), and Haldex. If you’re chasing an ABS light on a trailer, you can look up the fault code for Eaton Trailer ABS on page 37. The Abs sections are as detailed as the transmission ones. Don’t skip them – many drivability issues trace back to a wheel speed sensor fault.

Why Factory OEM Specs Matter for Eaton Fuller Transmissions

I’ve seen aftermarket code books that list a generic FMI 4 for a short circuit, but they don’t tell you which sensor or what the specific fault code number is. This manual comes from the same source that built the transmission. Every fault code – from AC-AS1 to CEEMAT – is verified against the original factory calibration. You get the actual PID/SID numbers used by the ECU. Without that, you’re replacing parts based on a hunch. That costs you billable hours and parts money.

3 Engine Families Covered

MID 128 covers five engine families: CAT, Cummins, Detroit Diesel, International, and Mack. Each has its own fault code chart. For example, Detroit Diesel starts on page 8. You’ll find codes like PID 111 FMI 1 for low coolant level warning. The manual also includes MID 142 and MID 158 for Mack engines, plus MID 219 for Eaton VORAD collision warning system. That’s a lot of ground in 48 pages.

Diagnostic Connectors: Page 44 Reference

Page 44 lists the diagnostic connectors. You need to know which pinout your tool uses. The manual covers the standard J1939 and J1708 connectors. If you can’t get a connection, you waste time probing blindly. The manual shows the correct locations and pin assignments. Pair it with a good scan tool and you’re set.

Related manuals that might help: Eaton Fuller AutoShift Gen II 2000 Diagnostics Manual – 20 Page Factory Specs for earlier models. Eaton Fuller Automated Transmissions Troubleshooting Guide for deeper diagnostic flowcharts. Eaton Fuller FR-11210B, FR-12210B, FR-13210B, FR-15210B, FR-9210B 2013 Service M for manual transmissions.

For background on how fault codes work, see On-board Diagnostics (OBD) on Wikipedia. For understanding transmission types, read Manual Transmission basics.

Internal reference: AutoRepairManuals Truck Section for more heavy-duty manuals.

Does this manual cover the Eaton Lightning transmission?

Yes. MID 130 – Eaton Lightning is listed on page 23 with its own fault code chart.

Are ABS fault codes for Wabco hydraulic included?

Yes. MID 136 – Wabco Hydraulic ABS starts on page 34. The manual covers both pneumatic and hydraulic systems.

What year is this manual valid for?

Published February 2004. It covers the 2004 model year and earlier. Fault codes for newer versions may differ. Check the Roadranger website for updates.

Can I use this with a generic OBD-II scanner?

Not directly. This manual assumes you have a diagnostic tool that reads MID, PID/SID, and FMI numbers. Most heavy-duty scan tools (like a Pro-Link or Nexiq) can display that data. The manual tells you what the numbers mean, not how to connect. For connector pinouts, see page 44.

Access the Factory Manual and get the exact fault codes your Eaton Fuller transmission is throwing. No more chasing ghosts. This is the same data the dealer techs use.