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Alfa Romeo Giulietta

Type 940

In Motortune Pro
Control units17
On any adapter7 of 17
Service resetYes
Actuator tests186

Need to read fault codes, reset the service light or check a warning lamp on your Giulietta without a workshop trip? Motortune turns your iPhone and an ELM327 / OBD-II adapter into a scanner for the Alfa Romeo Giulietta (type 940): it walks every control unit it can reach, names each fault in plain language, resets the service reminder and runs guided service routines. Free to scan; the one-time $18.99 Motortune Pro adds the write features.

Control units

Every unit the catalog lists for this model, across its model years — your car carries a subset, which the app finds when it connects. The tag says what reaches each one: Any adapter MS-CAN adapter vLinker MS Special cable

  • Engine
    • Dosing Control Unit FGAAny adapterActuators
    • Engine control unitAny adapterServiceActuators
  • Gearbox
    • Marelli DDCT transmissionAny adapterActuators
  • Brakes / ABS
    • ABS Bosch/ContinentalAny adapterActuators
  • Steering
    • Electric Steering ZFAny adapterActuators
  • Airbags
    • Airbag BOSCH/TRW/ZF EPvLinker MS
  • Driver assistance
    • Parking Valeo EPvLinker MS
  • Instrument cluster
    • Instrument Panel Siemens 3vLinker MSServiceActuators
  • Body
    • Body Computer Marelli 10vLinker MSActuators
  • Seats
    • Driver seat LearvLinker MSActuators
    • Passenger seat LearvLinker MS
  • Lighting
    • Headlights Automotive Lighting (EP)Any adapterActuators
  • Climate
    • Climate Control Marelli EPvLinker MSActuators
  • Infotainment
    • Blue&MevLinker MS
    • RadioNav Marelli EPvLinker MS
    • UCONNECT module EPvLinker MSActuators
  • Gateway
    • Security GatewayAny adapter

What you can do

  • Read fault codes, every reachable unit
  • Freeze frame
  • Vehicle & control-unit info
  • Clear fault codesPRO
  • Service / oil resetPRO
  • Adaptations & resetsPRO
  • CalibrationsPRO
  • DPF & exhaustPRO
  • Gearbox learnsPRO
  • Battery registrationPRO
  • Actuator tests (186)PRO
  • Live data per control unitPRO
  • Control-unit browser, DID explorer, raw consolePRO

Service functions and actuator tests are matched to each unit’s software version when you connect, so your car may show a subset.

Adapter

7 of 17 control units — including the engine — sit on the standard OBD pins, which any ELM327 v1.5+ adapter reaches. 10 sit on a second CAN or the body bus that only a vLinker MS switches to by itself (untested on hardware so far).

See the recommended adapters →

Other Alfa Romeo models: 4C 960 · 145 930A · 146 930B · 147 937 · 155 167 · 156 932 · 156 932 · 159 939 · 164 164 · 166 936 · Brera / Spider 946/939 · Giulia 952 · GT 937 · GTV 916 · MiTo 955 · Spider 916 · Stelvio 949 · Tonale 965

Giulietta — frequently asked

Does Motortune work with the Alfa Romeo Giulietta?

Yes. The Alfa Romeo Giulietta (type 940) is in Motortune’s catalog with 17 control units, 17 of which Motortune can reach with the right adapter. Coverage is mapped from the diagnostic catalog; try Demo mode and the in-app compatibility check on your car before relying on it.

How do I read fault codes on a Alfa Romeo Giulietta?

Plug an ELM327 / OBD-II adapter into the Giulietta’s diagnostic socket, switch the ignition on, and connect from Motortune on your iPhone. It walks every control unit it can reach — engine, gearbox, brakes / abs, steering and more — and lists each fault in plain language with the unit that reported it. Reading codes is free; clearing them is part of the one-time Motortune Pro.

Can I reset the service light on a Giulietta myself?

Yes. Motortune resets the service / oil-change reminder on the Alfa Romeo Giulietta the way a workshop tester does, with a guided step-by-step sheet. The service reset is part of the one-time $18.99 Motortune Pro.

Which service functions does Motortune run on the Giulietta?

Adaptations & resets, Calibrations, DPF & exhaust, Gearbox learns, Battery registration — 14 guided routines across this model’s control units. The app confirms each unit’s software version before offering one, so what you see on your car can be a subset. Part of Pro.

What adapter do I need for the Giulietta?

7 of 17 control units — including the engine — sit on the standard OBD pins, which any ELM327 v1.5+ adapter reaches. 10 sit on a second CAN or the body bus that only a vLinker MS switches to by itself (untested on hardware so far).

How much does Motortune cost?

Motortune is free to download and scan. The one-time $18.99 Motortune Pro adds clearing codes, the service reset, service functions, actuator tests and per-unit live data. No subscription, and one purchase covers every Alfa Romeo, Fiat, Abarth, Lancia, Jeep, Chrysler, Dodge, RAM, Peugeot and Citroën you own.

Motortune Pro

On the Giulietta

$18.99 one-time

Reading fault codes is free. One purchase covers every Alfa Romeo, Fiat, Abarth, Lancia, Jeep, Chrysler, Dodge, RAM, Peugeot and Citroën in your garage, with Family Sharing. Try Demo mode first — no adapter needed.

Coming soon to the App Store

Coverage is mapped from a diagnostic catalog of these models and is provided as-is, with no warranty. Some cars may not respond, some features may be unavailable on your car’s software version, and some adapters may be incompatible — always confirm with Demo mode and the in-app compatibility check before relying on any result. Motortune is an independent diagnostic tool and is not affiliated with, sponsored by, or endorsed by Stellantis or any of its brands. Make, model and control-unit names appear here only to describe vehicle compatibility. All trademarks remain the property of their respective owners.