151-2106 10R-5608 ECM ECU Engine Controller for Caterpillar CAT 385C 365C
151-2106 / 10R-5608 ECM for Caterpillar 365C, 385C and 5090B.
- Interchangeability: One module, four references: 151-2106, 1512106, 10R-5608, 10R5608. Existing bracket and harness, no rewiring.
- Application: Fits for Caterpillar 365B, 365C, 385B, 385C excavators, 5090B front shovel and mobile hyd power units.
- Check Your Generation: Covers both B and C machines — read the plate designation and the ECM label before ordering.
- Programming Required: Ships unflashed — must be configured to your engine serial number by a workshop.
$1,789.00
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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
151-2106 ECM (1512106), also referenced as 10R-5608 (10R5608) — a remanufactured, direct-replacement engine control module for Caterpillar 365B, 365C, 385B and 385C excavators, the 5090B front shovel and the mobile hydraulic power units built on those platforms.
These machines sit at the heavy end of the excavator range and the modules come back with the wear to match: sustained thermal load, heavy structural shock and years of dust. Each core is dismantled, the board is cleaned and examined under magnification, and the sections that give up first — supply regulators, injector driver outputs and the solder beneath the harness headers — are rebuilt with new components. Continuity is verified through the header pins, the board is re-coated against moisture, the case is resealed with a new gasket, and the finished module is run on a bench harness and function-tested to factory-specified operating parameters.
- One module, four reference formats. 151-2106 and 1512106 are the base reference; 10R-5608 and 10R5608 are the remanufactured-series numbering for the same unit. If your paperwork shows any of the four, this is the part.
- Spans the B-to-C transition on the 365 and 385 platforms, which is unusual — most references in this class cover one generation only.
- Direct replacement on the existing bracket and harness connectors; nothing on the machine side needs altering.
- Rebuilt to restore original operating parameters, with the factory calibration, engine protection and emissions strategy left exactly as defined.
- Driver outputs and supply components renewed rather than cleaned and passed, and the board re-coated for washdown and dust exposure typical of 5090B shovel and large excavator duty.
- Supplied as a bare module requiring a flash before the machine will start — see the notice below.
Programming Required — Supplied Without Engine Software
The module arrives with no application software or personality data loaded, so a workshop with dealer-level service tooling has to flash and configure it against your engine before the machine will run. Because this reference covers both B and C generation machines, the configuration differs meaningfully between them. Please send us:
- Engine Serial Number (ESN) and Vehicle Identification Number (VIN)
- Clear photographs of the ECM currently fitted, with every number on the label legible — note whether it shows 151-2106 or 10R-5608
- A photograph of the engine data plate showing the arrangement number
- The machine designation exactly as it appears on the plate — for example 365B II, 365C L MH or 5090B
Removal and refitting is a job for an experienced technician. Isolate the batteries at the master disconnect before opening any connector, and keep the connectors capped while the module is off the machine. Keep the old unit until the replacement is programmed and running: if the outgoing module still communicates at all, a workshop can usually read the parameters off it first, which shortens commissioning considerably.
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 |
|---|---|---|
| 151-2106 | Base reference, hyphenated | The form printed in machine service literature. |
| 1512106 | Base reference, no hyphen | How the number is normally entered into parts and stores systems. |
| 10R-5608 | Remanufactured-series reference, hyphenated | The same module under remanufactured-series numbering; frequently the number printed on the label of a previously replaced unit. |
| 10R5608 | Remanufactured-series reference, no hyphen | The searchable form of the same remanufactured-series number. |
Related Reference Numbers — Same Replacement Family
All four numbers above refer to this one module, so you do not need to choose between them. The references below are different parts that cover adjacent machines — useful if the label on your unit does not match.
| Reference Number | Typical Coverage Difference |
|---|---|
| 226-7475 / 2267475 | Overlaps on 365C and 385C machines but extends to 627G / 637 scrapers, the 586C and the TH31-E61 petroleum transmission instead of the B-series and the 5090B. |
| 145-7806 / 1457806 | Covers 385B and 345B II machines with 3176C engine builds — the earlier generation, and not a substitute here. |
Application Chart — Fits For Caterpillar
| Machine / Engine Category | Models |
|---|---|
| Front Shovel | 5090B, 385C |
| Excavator | 365B, 365B II, 365B L, 365C, 365C L, 365C L MH, 385B, 385C, 385C FS, 385C L, 385C L MH |
| Mobile Hyd Power Unit | 365C L, 385C, 385C L |
Before You Order
This reference reaches across two machine generations, and that is exactly where ordering mistakes happen. A 365B II and a 365C L are both on the list, but they are different machines with different configurations, so read the designation exactly as it appears on the plate. Then check the label on the module you are removing: it may show 151-2106 or 10R-5608, and either confirms you are on the right part. If the label is unreadable, photograph the module and the engine data plate and send both to us — we will identify it and tell you plainly if a different number is the correct one.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Name | Electronic Engine Control Unit — ECM / ECU Module |
| Reference Numbers | 151-2106, 1512106, 10R-5608, 10R5608 (all four refer to the same module) |
| 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 with engine-specific software using dealer-level service tooling; B and C generation machines take different configurations |
| 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 module 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. Brackets, 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
On 365 and 385 class machines and the 5090B shovel, a failing control module rarely presents as a clean no-start. It usually shows up as behaviour the operator notices before the fault codes do. These are the symptoms that most often trace back to the module itself.
| Symptom | What It Usually Points To |
|---|---|
| Engine runs steadily but the machine will not come off idle when the operator calls for hydraulic power | The module is not delivering a valid engine speed and load signal to the pump control. |
| Engine will not reach rated speed under load, though fuel supply and air restriction both check out | An internal fault limiting the module output, or a degraded speed input stage. |
| Unexplained shutdown events logged overnight or between shifts with no operator present | An intermittent internal fault in the module triggering protection or losing the fuel command. |
| Cooling fan runs at full speed continuously regardless of coolant temperature | The module has lost the input or the output stage that governs fan control and has defaulted to maximum. |
| Machine monitor displays dashes or blanks in place of engine data while the engine keeps running | The module is still controlling the engine but has stopped transmitting on the data link. |
| Hard starting only in cold ambient conditions, normal once the weather warms | A marginal internal supply or a degraded capacitor that cannot hold up at low temperature. |
| Injector fault codes grouped on one bank rather than scattered across cylinders | One driver stage inside the module has failed, rather than several injectors failing together. |
| Sudden derate with a cluster of unrelated sensor codes logged in the same instant | Collapse of the regulated sensor supply generated inside the module. |
Rule Out The Cheap Causes First
Before committing to a module on a machine this size, rule out the cheap causes properly: battery condition under crank, the engine-to-frame ground straps, the ECM supply fuses and relays, and both harness connectors checked for water, green corrosion and back-out terminals. On 5090B and large excavator installations, also inspect the loom where it crosses the engine mounts, since chafe there imitates an internal module fault convincingly. Replacing a healthy ECM is an expensive way to discover the fault was a ground strap.
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 151-2106 / 1512106 / 10R-5608 / 10R5608 are quoted purely as OEM cross-reference data to help you identify the correct fitment.
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