11 votes
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Are there requirements for building a car-PC and it's software?

There is legislation known as "E-Mark" that pertains to electronic devices that are permanently installed in a vehicle. This car PC manufacturer is UK based and has a great description of ...
JPhi1618's user avatar
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10 votes

Are there requirements for building a car-PC and it's software?

My 2012 Volkswagen Golf has an RCD510 multimedia unit which features a touch screen, card slot, USB connector, bluetooth and six disc drive, integrated front and rear parking sensors. I know that ...
Steve Matthews's user avatar
8 votes
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ECM vs. PCM vs. ECU?

From my personal experience with this particular subject you have many variables that come into play. My shop specializes in computer systems on some of the newer vehicles (Mostly Japanese), but we do ...
cloudnyn3's user avatar
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8 votes
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Is there a way to use a PC as an ECU for testing CANBUS Sniffer devices?

Sadly you are not going to be able to do what you want simply connecting CAN-H and CAN-L to a serial port. Here is a pointer to the physical interface layer for CANBUS. CANBUS Physical layer ISO ...
cdunn's user avatar
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8 votes

Are there requirements for building a car-PC and it's software?

This article speaks to how Android Auto complies with regulations: Google built Android Auto so that it complies with recognized automobile safety standards, including the National Highway ...
Lynn Crumbling's user avatar
8 votes
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'09 Chevy Malibu - No Crank, No Start - Heavy Troubleshooting Already Completed

On GMs now adays the Engine Control Module controls the starter relay. It will look for a park/neutral signal from the range switch and a crank signal from the ignition switch/Body Control Module. A ...
Ben's user avatar
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8 votes
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OBD-II difference between signal ground and chassis ground

You are over thinking things, just connect your devices (OBD & Pi) to a good chassis ground: The difference between chassis and signal ground is: Chassis Ground Pin 4: Is exactly that, ...
Newbie Noob's user avatar
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7 votes
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Simplest installation of car-powered car-pc

Most everything external of the ECU is going to be 12vdc (+/-2v). (NOTE: As @juhist points out, more and more cars are supporting 5vdc output to charge handheld devices through USB ports. 5vdc may ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes

'09 Chevy Malibu - No Crank, No Start - Heavy Troubleshooting Already Completed

Looking at the video, it appears to be an electrical problem. It looks like the main power leads are losing their continuity when you turn the key to activate the starter. This issue could be ANYWHERE ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes

Can the warning chime tone of a 2007 BMW 525i be changed, or shortened somehow?

I know nothing about BMW, but this might help. My VW Jetta had a "La Cucaracha" warning buzzer that was plugged into the fuse box and looked like a relay with a speaker on it. Rather than unplugging ...
JPhi1618's user avatar
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5 votes

Can the warning chime tone of a 2007 BMW 525i be changed, or shortened somehow?

I'm not sure about BMW, but I used to develop these chimes for Ford and Fiat. They were implemented in the vehicle media system, aka radio. So, in order to change the volume or type of chime one must ...
PDuarte's user avatar
  • 217
5 votes

How to control a car (accelerating, braking, steering) programmatically?

No car has every attribute to be fully autonomous out of the box. Brakes: If a vehicle is equipped with dynamic stability control then software control of the brakes is possible. Dynamic stability ...
vini_i's user avatar
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5 votes
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Installing mobile apps on a car board computer

If I understand you question correctly you want to install your own applications on your on-board computer. To do this you would need extensive reverse engineering and software development knowledge. ...
Newbie Noob's user avatar
  • 2,781
4 votes

Could the OBD2 connector be used to switch gears?

The commands to read out Speed, RPM and some other sensor data was well as fault codes are standardized for all cars and commonly known. That is, one can "easily" develop some software to read out ...
sweber's user avatar
  • 7,057
3 votes

Simplest installation of car-powered car-pc

Electronic modules that take car 12V and make 5V are sold at every convenience store, gas station and grocery store in the developed world. Right next to the phone charging cables. They're not even ...
Harper - Reinstate Monica's user avatar
3 votes
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What computer does a Toyota Corolla use?

The controller is called the Powertrain Control Module (PCM). On this model it will be located near the glove box. It is made by Denso Corp. These units and the software that control the system are ...
Fred Wilson's user avatar
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3 votes

OBD-II difference between signal ground and chassis ground

As Ben stated in the comments, they are both usually grounded to the same point on the chassis. My suggestion to you is to just ground it to the chassis and ignore the #4 & #5 pins altogether. The ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

Fuel Economy Gauge Modification

For what it's worth, there is a way to access the instantaneous fuel flow rate inside the secret menu on this model. I know this is not exactly what you're after but this parameter has a very fast ...
Zaid's user avatar
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3 votes

PCM Bench Testing

It's very hard to tease out what your actual problem is. Here is what I've figured out. Your truck won't start and you have no communication with the PCM. This makes you think that the PCM is bad. How ...
vini_i's user avatar
  • 16k
3 votes

ECM vs. PCM vs. ECU?

The term ECM could (just as @cloudnyn3 says) be used for both Electronic Control Module or Engine Control Module. Different brands has different names for the same stuff, and also same name for ...
Markus's user avatar
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2 votes
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Why would my odometer reset to the same mileage whenever I turn off the ignition?

Cause Your car (like most cars) saves the milage in a small memory chip inside the instrument cluster. That chip is called an EEPROM. Like most memory units EEPROMs are subject to wear. If you ...
user5626466's user avatar
  • 1,301
2 votes

'09 Chevy Malibu - No Crank, No Start - Heavy Troubleshooting Already Completed

Thinking more, you turn the key, massive voltage drop as the starter tries, 1) bad earth to the engine: connect the battery's black wire to a good metal part of the engine, as it is trying to earth ...
user26112's user avatar
2 votes
Accepted

How important is it to register the new after-market battery in BMW vehicles?

BMW uses a proprietary software to control the charge rate of the AGM batteries in their vehicles. The computer calculates the needed charge rate based on the age and condition of the battery. BMW ...
mikes's user avatar
  • 19.9k
2 votes

Simplest installation of car-powered car-pc

Bay of fleas and a DC to DC buck converter plugged into the cigarette lighter controlled by ignition. Most cigarette lighters go off when the starter is engaged...
Solar Mike's user avatar
  • 34.7k
2 votes

How can I determine if a 2015 Nissan Leaf can be monitored/controlled via an app?

I know I'm late to the game here, but just FYI, the S-trimmed LEAF (base trim, available 2013-2017) didn't come with any sort of telematics -- hacked, abandoned, or otherwise. Also the Bluetooth is ...
Eric Lloyd's user avatar
2 votes
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How can I determine if a 2015 Nissan Leaf can be monitored/controlled via an app?

Nissan used to have an app called CarWings for the purpose you describe. Problems with it getting hacked caused Nissan to disable that software and move to an app called NissanConnect EV. ...
CharlieRB's user avatar
  • 9,035
2 votes

Ford Figo not starting immobilizer

The very first thing to do with this is get your battery checked. Then if bad, replace it. Then when you have a working battery, check the charging system. Make sure all battery and charging system ...
Jupiter's user avatar
  • 3,187
2 votes

I took the battery off my car 2006 Honda CR-V

I assume an aftermarket car alarm system. Factory-installed security systems generally behave better (with some exceptions and I am not aware if your Honda is among the bad exceptions). It is pretty ...
fraxinus's user avatar
  • 2,042
1 vote

AC compressor stopped working, electrical/program issue

ECUs are generally supposed to disengage the clutch of a clutch equipped AC compressor when WOT is reached. Something is there to check if the engine is in WOT condition, it may be faulty and be ...
Al_'s user avatar
  • 958
1 vote

Simplest installation of car-powered car-pc

Coincidentally working on my carpc right now, although it is a mini-ATX box. I used one of these: http://www.mini-box.com/DCDC-USB-200 - which may be overkill for your application, but provides some ...
jimbofreedman's user avatar

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