226-7475 2267475 Engine Control Module ECM for Caterpillar 365C 385C C9 C7
226-7475 ECM — direct replacement for Caterpillar 365C, 385C and C7 / C9 engines.
- Interchangeability: Replaces 226-7475 / 2267475. Existing bracket and harness connectors, no rewiring.
- Application: Fits for Caterpillar 365C & 385C excavators, 627G / 637 scrapers, 586C, C7 / C9 engines.
- Programming Required: Ships unflashed — a workshop must configure it to your engine serial number.
- Condition: Remanufactured from a tested core, with new power-supply and injector driver components.
$1,399.00
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Bench-Tested - Every unit powered up and function-tested before dispatch.
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6-Month Warranty - From delivery, against defects in materials and workmanship.
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30-Day Returns - Unused items in original packaging. RMA required.
Product Details
226-7475 (2267475) remanufactured engine control module — a direct-replacement ECM for Caterpillar 365C and 385C excavators, 627G / 637 wheel scrapers, the 586C site prep tractor and C7 / C9 industrial and petroleum engine builds.
Each core is stripped back to the bare board before rebuild. The case is opened, the PCB is washed and inspected under magnification, and the components responsible for most field failures — power-supply electrolytics, injector driver stages and fatigued solder joints around the connector headers — are replaced with new parts rather than simply cleaned. The board is re-coated, the housing is resealed with a fresh gasket, and the finished module is run on a bench harness and function-tested against factory-specified operating parameters before packing.
- Direct replacement: bolts to the existing mounting bracket and mates with the machine harness connectors already on the engine, so no adapters or wiring changes are needed.
- Rebuilt to restore original operating parameters — calibration ranges and engine protection strategies are left exactly as the factory defined them.
- Failure-prone power supply and injector driver components are replaced with new parts, not just tested and passed through.
- Conformal-coated PCB and resealed die-cast housing to stand up to the vibration, dust and washdown conditions typical of 365C / 385C excavator and scraper work.
- Cross-referenced under both the hyphenated 226-7475 and the flat 2267475 formats — the same module either way.
- Supplied as a bare module: flashing with the software for your specific engine is a separate workshop step, covered in the notice below.
Programming Required — This Module Ships Unflashed
The unit is supplied without your engine’s application software or personality data. It must be flashed and configured by a workshop with dealer-level service tooling before the engine will run. Please send the following straight after checkout:
- Engine Serial Number (ESN) and Vehicle Identification Number (VIN)
- Clear photographs of the ECM currently fitted, with every part and serial number on the label legible
- A photograph of the engine data plate showing the arrangement number
- Machine model and serial number prefix
Removal and installation should be carried out by an experienced technician. Isolate the batteries at the master disconnect switch before unplugging anything, keep the connectors capped while the module is off the machine, and never crank or jump-start the engine with the ECM connectors only partially seated.
Fitment & OEM Interchange
Caterpillar and CAT machine model designations appear below only to identify the equipment this aftermarket module is built to fit. The OEM interchange numbers listed are cross-reference data for identification purposes and do not imply that this part is made, supplied or endorsed by the trademark holder.
Part Number Cross-Reference
| Reference Number | Format / Role | Notes |
|---|---|---|
| 226-7475 | Primary reference, hyphenated | The format used in most machine service literature. |
| 2267475 | Same reference, no hyphen | How the number appears in many parts catalogues and search boxes. |
| 226 7475 | Space-separated variant | Occasionally seen on workshop paperwork and hand-written job cards. |
Related Reference Numbers — Same Replacement Family
The reference numbers below sit in the same replacement family and turn up on machines with overlapping application lists. They are not automatically interchangeable — coverage varies by build date and engine arrangement, so read the label on the module currently fitted, or send us a photo of it, before you order.
| Reference Number | Typical Coverage Difference |
|---|---|
| 478-7933 / 4787933 | Broader list — adds underground haul trucks, LHD loaders, rotary drills and C11 / C15 / C18 builds. |
| 20R-8182 / 20R8182 | Remanufactured-numbered unit covering 627G / 637 scrapers, the 586C and AD30 underground truck. |
Application Chart — Fits For Caterpillar
| Machine / Engine Category | Models |
|---|---|
| Excavator | 365C, 365C L, 365C L MH, 385C, 385C FS, 385C L, 385C L MH |
| Front Shovel | 385C |
| Industrial Engine | C7, C9 |
| Mobile Hyd Power Unit | 365C L, 385C |
| Petroleum Engine | C7, C9 |
| Petroleum Transmission | TH31-E61 |
| Site Prep Tractor | 586C |
| Wheel Scraper | 627G, 637D, 637E, 637G |
Before You Order
The 365C and 385C ranges were built across several years and more than one control module number was fitted over that period. Order from the number on the label of the ECM currently on the engine, not from the machine model alone. If the label is unreadable, send us photos of the module and the engine data plate and we will confirm the match before you pay.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Name | Electronic Engine Control Unit — ECM / ECU Module |
| Reference Numbers | 226-7475, 2267475 |
| Condition | Remanufactured — rebuilt from a tested core |
| Installation Method | Direct replacement — mounts to the existing bracket and mates with the existing machine harness |
| Programming | Required — flashing and configuration with engine-specific software by a workshop holding dealer-level service tooling |
| System Voltage | 24V nominal on the machines listed — application dependent, confirm on the data plate |
| Housing Material | Sealed die-cast aluminium case with integral heat-sink face |
| Connectors | Sealed multi-pin machine harness connectors — pin count is application dependent, match against the unit being replaced |
| Circuit Protection | Reverse-polarity and transient suppression to factory-specified design; no protection features removed or bypassed |
| Testing | Powered up and function-tested on a bench harness before dispatch |
| Warranty | 6 months from delivery, against defects in materials and workmanship |
| Package Contents | 1 × engine control module. Mounting hardware, harness, gaskets and software licences are not included. |
This module is supplied to restore factory-specified performance and original operating parameters only. Emissions-related calibration and engine protection strategies are left exactly as the factory defined them; we do not supply, alter or support any change to emissions control functions.
Common Failure Symptoms
These are the symptoms most often traced back to a failed engine control module on 365C / 385C excavators, 627G / 637 scrapers and C7 / C9 engine builds. A supply or wiring fault can produce an almost identical picture, so read the note under the table before replacing anything.
| Symptom | What It Usually Points To |
|---|---|
| Engine cranks over normally but never fires, and there is no injector click audible at the valve cover | The injector driver stage or the internal high-side supply has stopped delivering voltage to the injectors. |
| Machine runs for twenty minutes, shuts down, then restarts once the module has cooled | A heat-sensitive component or cracked solder joint going open circuit as the housing warms up. |
| The service tool will not connect to the engine ECM, although other modules on the machine answer | A failed data link transceiver inside the module, or a lost power or ground feed at the ECM connector. |
| Coolant, boost and throttle codes all appear together with no mechanical cause | The regulated sensor supply generated inside the module has collapsed, taking every sensor on that rail down with it. |
| Engine drops to low idle and ignores the throttle, with nothing found mechanically | The module has defaulted to a limp-home strategy after detecting an internal fault. |
| ECM parameter or memory fault codes that reappear the moment they are cleared | Corrupted flash or a failing internal memory device inside the control module. |
| Throttle response cuts in and out while the scraper or excavator works over rough ground | Vibration-related cracking around the connector header pins on the module board. |
| Damp, oil film or green corrosion visible inside the ECM connector shell | Moisture ingress that has already attacked the module inputs — inspect the harness seals at the same time. |
Rule Out The Cheap Causes First
An ECM is one of the most expensive parts on the machine and one of the most frequently replaced by mistake. Before ordering, load-test the batteries, clean and torque the main chassis ground straps, check every fuse and relay feeding the module, and inspect the ECM connectors for bent pins, spread terminals and water. A tired battery or a corroded ground can reproduce nearly every line in the table above.
Shipping & Quality Guarantee
- Dispatch: orders are dispatched in 1–3 business days after the fitment details are confirmed.
- Free express delivery: DHL / FedEx / UPS, 3–8 business days door to door.
- Tracking: a tracking number is issued within 24–48 hours of dispatch.
- Bench-tested: every unit is powered up and function-tested before it leaves the workshop.
- 6-month warranty from delivery, against defects in materials and workmanship.
- 30-day returns on unused items in their original packaging; an RMA number is required before shipping anything back.
- Protective packaging: anti-static bag, foam-lined carton, connector caps fitted to keep the pins clean in transit.
- Technical support: send us your data plate photos and we will confirm the reference number before and after the sale.
Shipping & Customs Notice
The amount charged covers the product and shipping only. Import duties, VAT, GST, customs clearance charges and any other local taxes are not included and remain the responsibility of the buyer. Please check your own country’s import rules before ordering.
Caterpillar®, CAT® and all machine and engine model designations are the registered trademarks of their respective owners. We are an independent supplier of aftermarket replacement parts and have no affiliation with, sponsorship from or authorisation by the trademark holder. Reference numbers including 226-7475 / 2267475 are quoted purely as OEM cross-reference data to help you identify the correct fitment.
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