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iDatastart CMHCXA0 HC

Digital remote start system — uses a vehicle-specific T-harness (sold separately)

Item # 794ADSHCX

iDatalink makes it easier than ever to add remote start.

Find what Fits your car

iDatalink makes it easier than ever to add remote start.

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Item # 794ADSHCX

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About the iDatastart CMHCXA0 HC

Ladies and gentlemen: start your engines

iDatalink makes it easier than ever to add remote start. Their iDatastart CMHCHXA0 remote start system gives you the luxury of being able to start and warm up (or cool down) your vehicle before you begin your trip or commute. You start your car by pressing the lock button on your factory key three times. You can start your car from as far away as the key will lock and unlock your doors. 

Ladies and gentlemen: start your engines

iDatalink makes it easier than ever to add remote start. Their iDatastart CMHCHXA0 remote start system gives you the luxury of being able to start and warm up (or cool down) your vehicle before you begin your trip or commute. You start your car by pressing the lock button on your factory key three times. You can start your car from as far away as the key will lock and unlock your doors. 

Note: This feature works on most vehicles, but in certain select vehicles, the factory key won't work with this remote start and an RF kit will be required for installation. Please contact us for more details.

Optional RF remotes increase the range and functionality

Want to be able to start your car from inside your home or office? You can extend your remote start range to up to 3000 feet, over a half mile, with one of these RF remote kits.

Each kit contains two remote controls, an antenna module, and connection harness. The 2-way remotes feature LED and chimes to inform you what your vehicle's doing. The 5-button kits let you integrate more fully with your factory security system, letting you remotely lock and unlock the doors, pop open the trunk, honk the horn, flash some lights, and perform other functions in addition to starting your engine.

Vehicle-specific application

The iDatastart module requires a vehicle-specific T-harness, sold separately, to make a fast and fully integrated connection with your vehicle's computer, security, and ignition systems. In addition, you'll need to go to to flash your iDatastart module so that its firmware will match your vehicle exactly and all functions will operate as intended. We include a USB cable in the package to ensure a proper connection to your computer.

Note: At the present time, you must use a Windows PC running Internet Explorer in order flash your iDatastart module.

We ask that you call to order this iDatastart module, so that we can offer you the correct vehicle-specific T-harness that you will need for your installation.

If you know how to use a multimeter and have experience working with your vehicle's electrical system, you should be able to install this remote start system yourself. If not, please consider having your system professionally installed.

To ensure vehicle compatibility, please enter your vehicle information. Your order will be reviewed by our Car Experts group, who will contact you if further information or recommended accessories are needed.


Product highlights:

  • remote start system
  • works in select remote start-ready vehicles
  • requires a vehicle-specific T-harness (sold separately)
  • requires Windows PC running Internet Explorer to flash firmware to module
    • mini-B USB to USB-A cable not included
  • uses your car key's lock button to start vehicle remotely
  • also controls factory security basic functions
  • remote start function is for fuel injected, diesel, and hybrid vehicles with automatic transmissions only
  • optional RF kits extend range up to 3,000 feet
    • RF1111A RF Kit 1-button/1-way
    • RF2312A RF Kit 1-button/2-way
    • RF1151A RF Kit 5-button/1-way
    • RF2352AC RF Kit 5-button/2-way
  • compatible with most SmartStart modules, like:
  • warranty: limited lifetime
  • Our 60-day money-back guarantee

What's in the box:

  • HCX Remote start control module
  • Hood pin-switch
  • 7' Hood pin-switch wire
  • Owner's card (QR code to access installation guides)
  • 2 Engine compartment warning stickers (Eng / Fren)

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Crutchfield response

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More details on the iDatastart CMHCXA0 HC

Russ B.

Features & specs

Lines of Defense
Alarm Factory/optional remote
Pager Warning No
Scan-resistant Remote Codes No
Battery Backup No
Trigger Methods
Glass Break Sensor No
Accessory Pins Hood pin-switch
Current Sensing No
Arming Method Factory/optional remote
Included Remotes None
Number of Remote Buttons ---
Number of Remote Functions ---
Two-way Remote Optional
Smartphone Integration Optional
Factory Security Integration Arm/disarm
Number of Cars ---
Hood/Trunk Release Factory
Remote Door Locks Factory
Remote Start Yes
Manual Transmission Compatible No
Valet Switch No
Manual Override No
Delayed Operations
Entrance No
Exit/Last Door No
Reset/Trigger No
Rearm/Disarm No
Number of Zones 0
Parts Warranty Limited Lifetime
Labor Warranty Limited Lifetime

Product Research


Overview: The iDatastart HCX control module allows you to remote start most vehicles from 1988 on up. It features a user-flashable immobilizer bypass module, with no key required for most cars, that can be activated with 3 presses of the lock button on most factory transmitters. Along with remote starting, the HCX control module can also retain certain factory features such as door locking/unlocking, parking light flash, and trunk or hatch release. Compatibility and available functions will vary depending upon year, make, and model of vehicle. Vehicle specific t-harnesses are available for most cars, making installation much easier by plugging directly into the vehicle's wiring system.

T-Harnesses: One of the key time saving advantages of installing the iDatastart HCX versus other remote start interfaces is the option of using a vehicle specific T-harness for installation (sold separately). These vehicle specific interface harnesses are designed to plug into the factory wiring (locations vary per vehicle), providing a much faster and easier method of interfacing the factory wiring. T-harnesses are available for most current vehicles, please check for availability.

Note: T-harnesses will take care of the bulk of required wiring, but some hardwiring into the vehicle's wiring system will still be required.

Remotes: The iDatastart HCX remote start module is designed to be activated using either the factory remote or one of iDatalink's optional one-way or two-way remote controls (sold separately).

  • Factory Remote Control: If using the factory remote control, remote starting is activated by pressing the lock button 3 times consecutively. This same series of lock button pushes can also be used to stop the engine once it's been started. All other functions on the factory key fob will perform as they have. Remote starting range will be dependent on the factory key fob range.
  • iDatastart Remote Control: iDatalink offers both 1-button and 5-button optional transmitters in either a 1-way and 2-way design (all sold separately). Both types use FM technology to achieve a maximum range of up to 3000 feet. The 1-way remotes will give a visual confirmation that a command has been sent, via an LED indicator, while the 2-way design will give a "sent" confirmation as well as a "receive" confirmation that the command was performed.
    • 1-Button Transmitter: A single short press of the 1-button transmitter's single button will lock the vehicle doors while 2 short presses will unlock. Pressing and holding for 2.5 seconds will activate the remote starting function while performing the same process twice will shut down the engine. Available 1-button transmitters include the RF1111A 1-way transmitter and the RF2312A 2-way transmitter.
    • 5-Button Transmitter: This option provides 4 main buttons, which are pre-programmed for Lock/Arm, Unlock/Disarm, Trunk/Hatch Release, engine Start/Stop, and a 5th Function button (F) on the side of the remote. Up to 30 programmable functions are available such as; Panic, Silent Lock/Unlock, Valet Mode, Ignition Lock, Passive Arming, and many others. Each of the 4 main buttons (excluding the Function button) includes it's own LED along with a single LED at the top of the remote. The top LED will light to confirm when any button is pressed and the individual function LED will light afterwards to confirm that that command was performed. Available remotes include the RF1151A 1-way transmitter and the RF2352A 2-way transmitter.

Flashing: The iDatalink HCX remote start module will need to be flashed with the appropriate firmware for the vehicle it will be installed in. After downloading the Weblink Updater 6.3 Plugin from the iDatalink's Weblink page, the next step is to register at After registering and logging in, the Weblink page will allow you to enter the vehicle information and then proceed to flash the iDatalink module. The flashing process must be done on a PC (Mac not supported) running one of the following; Windows XP (SP2), 2000 (SP4), Vista, Windows 7, 8.1, or 10, all using Internet Explorer 7.0 or higher (64-bits). Note: A USB cable with a mini-B connector to type-A connector (2.0) will be required for flashing.

Installation Guides: Complete installation guides are provided at the Support page of iDatalink's web site, and can also be quickly accessed from a smartphone or tablet with a QR code reader. An Owner's Card is provided with the iDatastart module that includes a QR code that, once scanned, will pull up the operating instructions.

Hood Pin: An optional hood pin-switch is provided for installation if the vehicle doesn't include a factory installed one. This important safety feature allows the remote starter to shut down the engine if someone opens the hood after the engine has been remotely started.

Engine Runtime: Once the vehicle has been remotely started, with either the factory key fob or the optional long-range transmitters, the engine will run for a programmed amount of time before either being taken over with the key in the ignition or shut down after timing out. The iDatalink's default runtime is 15 minutes but can be user programmed for 3, 5, 10, 25, 30, or 35 minutes.

Smart Phone Control: The iDatastart HCX is designed to work with most smartphone integration systems such as the Viper VSM350 or VSM550 SmartStart modules (sold separately). This allows you to remotely activate the HCX remote start, lock and unlock doors, activate the trunk release, and more, using your Apple or Android smartphone or smartwatch.

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Customer Q&A

Crutchfield asked: Why did you buy this?
Plug and play. [ John  Dec 22, 2018 ]
Trish recommended this product because it seems to be easier to install than other systems that require more involved connections. [ Rich  Dec 19, 2018 ]
to install in my car as i live in new jersey and would like to have one. [ Ernest  Dec 15, 2018 ]
Recommend [ Dillon  Dec 12, 2018 ]
Works with factory Key fob [ Conor  Nov 25, 2018 ]
Optional remote & 1 or 2 way signal range extender for iDatastart remote start system. [ Alexander  Oct 13, 2018 ]
Was specific to my vehicle and was told it would be the best purchase for my particular vehicle which is a 2015 Mazda CX-5 Touring AWD/ Automatic / Push button start vehicle. I also purchase the T-Harness which is required if not already part of the vehicle. [ Gary  Sep 30, 2018 ]

4 questions already asked

I have a 2018 RAV4 with push button start (smart access). Will this work with that?
[ Edf1991  Sep 21, 2019 ]
3 answers
Product works great and easy to install. That said, I don't I know if it is compatible with your RAV4.
[ FAF  Sep 21, 2019 ]
As long as you have the right unit it should
[ Mark  Sep 21, 2019 ]
Yes this will work with your vehicle, but will require a specific wire harness( called a T- harness ) depending on the options you have in your vehicle such as your push button start. Very easy install.
[ David  Sep 21, 2019 ]
Can this be put on a manual transmission ?
[ George  Aug 27, 2019 ]
5 answers
remote starters can be installed into manual trans but I'm sure everyone will tell you that it is not recommended due to the car taking off should you leave it in gear
[ marc  Sep 10, 2019 ]
[ MARTEN  Sep 10, 2019 ]
Hi George, thank you for your question. The iDatastart CMHCXA0 HC, is for automatic transmissions only.
[ Jess  Sep 09, 2019 ]  Staff
There is a wire that I had to cut labeled "for automatics" so that would make me think so but I don't know 100%.
[ jamie  Sep 09, 2019 ]
I put in on a 2013 Ford Fusion so I am not sure if it will work with a manual transmission or not. I don't see any reason that it wouldn't.
[ Joseph  Sep 09, 2019 ]
Has anyone installed this on a 2018 Ram 1500 or similar 4th gen RAM? Was looking at getting this for my truck but I wanted some more details on exactly how much, if any at all, wire splicing would need to be done to get this to work with my factory fob. Thanks!
[ Jacob  Jun 27, 2019 ]
1 answer
If they make a wiring harness for your car, it's almost no splicing (maybe 1 or 2 wires). Otherwise you're going to splice 20 or more wires. Check idatalink website or chat with crutchfield for more info.
[ YANG  Jul 03, 2019 ]
Hi Gary from Dayton,OH. I too have a 2015 Mazda CX5 and am thinking of purchasing the same remote start. Can you give me any tips or let me know of any pitfalls before I start? The install seems pretty easy, it's the programming that has me concerned.
[ Mike  Dec 21, 2018 ]
9 answers
I have a camry, so not sure about cx5. Installation was pretty easy, instructions were good. Most difficult part of installation was removing the lower dash panel without any schematics (you might get lucky on YouTube). Program was a breeze. If you decide to use a mini USB cable, instead of the special web link cable, you need to find the windows drivers on the idatalink website. Precreate your account on the idatalink site, they only allow professional installers but I was able to create an account using "crutchfield" on the company field. Program the module via the web interface (its wizard based), install module, then tach program, then remote program (if equipped). Enjoy.
[ YANG  Dec 24, 2018 ]
The Programming is actually the easiest part. The website is very easy to use. Once you hook the module to the computer and do the initial flash, the rest is pretty self-explanatory. For me the part that took the longest was wiring the few connections the T harness didn't cover.Enter an answer to this question.
[ Michael  Dec 23, 2018 ]
I did this remote start on a Toyota and it was very simple I ran into a slight issue but crutchfield was very helpful, the programming wasn't to hard, you plug it into a computer and go to the manufacturer website and put in what vehicle and options you have and it programs it before it's installed
[ nick  Dec 22, 2018 ]
Hi Gary, everyone seems to recommend the Fortin EVO product for our Mazda's, I'm not exactly sure why. I tried the Fortin, had nothing but problems, a Crutchfield representative suggested trying the idatastart... easiest install I've ever done, it's literally plug & play... hook it up to your computer, input your vehicle, the idatastart automatically flashes the module for your vehicle, plug it in to your car and you're good to go. I highly recommend this product.
[ Jeff  Dec 22, 2018 ]
You need to be a powe computer user IMO. Not exactly plug and play, takes some effort.
[ MATT R  Dec 21, 2018 ]
The programming was pretty easy, The biggest issue I had is that you must use a Windows PC for the programming and I have a MAC. I ended up taking the module over to my parents house and using their Windows desktop. Otherwise, the programming software takes you step by step through the process.
[ Brock  Dec 21, 2018 ]
Programming is pretty straight forward. The worse part is you have very little time during the process but it is doable.
[ steven  Dec 21, 2018 ]
Yeah you're right, the installation it's not bad. Also the programing its easy the only thing that I ran into was establishing communication between the module and the computer. It turn out to be the .netframe.2.0 or something If you have any issues, feel free to contact me. Also make sure you have a usb to micro usb cable.
[ Adrian  Dec 21, 2018 ]
The hardest part about programming is getting ur computer to recognize it when u plug it in your computer.. programming it is easy. It tells u step by step.. took about 3 mins to program.
[ DUSTIN  Dec 21, 2018 ]

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