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Questions tagged [computer]

Catch all tag which can refer to the "brain" of the car which can control the engine and/or transmission of the vehicle. This would include such terms as PCM (powertrain control module), ECM (engine control module), PCU (powertrain control unit), ECU (engine control unit), and many, many others.

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2005 Toyota Corolla intermittently won't start then stalls after 1 mile

Last night I turned the car off, then tried to restart but got nothing... no click no crank... nothing. But have lights (interior and exterior), alarm, horn, radio etc. I set the alarm and left it. ...
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Pontiac Grand Prix won't start, horn would honk, electrical system goes crazy

Some facts: My dad has an aftermarket Remote Keyless Entry Not aware of any aftermarket theft system, does not use keyless start He's used 410 watt power inverters through the cigarette lighter but ...
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What is the best course of action when Jeep Wrangler transmission has been driven with low fluid levels

A small pinhole occurred in the transmission cooler lines near the radiator in a 2012 Jeep Wrangler. It has automatic transmission. Over time the owner kept adding transmission fluid when needed and ...
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AC compressor stopped working, electrical/program issue

My Ac was working fine untill 2 days ago, I was accelrating normally and then generic error messege appeared on the dash and the AC stopped! (fans and compressor). I tested the fans, they are woking ...
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132 views

2008 Saturn Aura: Programming the mileage on a used BCM

HELP! I replaced the BCM in my 2008 Saturn Aura with a Used BCM. I then took it to the dealership to have them program it. Now I notice that my odometer isn't working, so I looked at my invoice from ...
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Forester repair

If anyone can help. I have error code P1700-TPS Circuit Malfunction-Check codes in TCM. Error Code P0731-Gear 1 Incorrect Ratio Error Code P0122 TPS Switch A Circuit-Low Input. I have asked ...
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5answers
911 views

Simplest installation of car-powered car-pc

Am posting here as this question seems to be considered off-topic on both the electronics and the Raspberry sister sites. Would like to install a carputer (Raspberry Pi), and am wondering about the ...
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2000 Chevrolet Silverado 1500 crank won't start

So in 2016, my truck was used like a submarine when it flooded in my area and I was getting a heart patient to safety. (water was up to the windshield) Went to get truck and couldn't find the keys---...
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OBD-II difference between signal ground and chassis ground

Am planning to install a carputer (Raspberry Pi) in a 2005 Ford Mondeo, replacing the car stereo. The Quadlock connector to the stereo apparently includes CAN bus, so I am thinking I will get a USB ...
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Replace old Bosch computer with Motronic?

I have a 1996 B5254S engine that came with a Bosch LH-3.2/EZ-129K computer. The next model year 1997 they started using the Motronic 4.4 computer for this engine. Can I just switch out the Bosch for ...
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Installing mobile apps on a car board computer

I'm an owner of a Honda Accord 2011 and I'm wondering whether it's possible to install mobile apps on my onboard car computer. It would help me because my manufacturer installed a default navigation ...
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Toyota Corolla alarm system problems

I just bought a Toyota Corolla 2013 Special Edition last week. Just after a few days, suddenly once I entered the key, turned and I was going to start the engine, everything started blinking, the ...
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CASE / CKP relearn without GM Tech II. 09 Chevy Malibu

I need to do a CASE Relearn procedure following a CPU swap on an '09 Chevy Malibu. Is there a way I can do this without taking it to a GM dealer who has the Tech ii device? Are there lower cost ...
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How can I determine if a 2015 Nissan Leaf can be monitored/controlled via an app?

I've seen in reviews that Nissan Leaf's have a phone app that can monitor and control its charging and climate functions. For example, you can view on your phone how much power the car's battery has, ...
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'09 Chevy Malibu - No Crank, No Start - Heavy Troubleshooting Already Completed

Answer: Turns out the computer was shot, entirely non-functional. Swapped one out and the car started right up. For future readers: The computer is a likely cause if the vehicle has power, yet ...
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How important is it to register the new after-market battery in BMW vehicles?

According to BMW dealership the new after-market battery must be registered to the on-board computer, because, otherwise, the car would think that the old battery is still in and it would end up being ...
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How do I unlock the computer that controls the dash?

My Toyota car would not start so I had the fuel pump changed. It still would not start so we changed the computer. Now, it is throwing all kinds of codes when I drive. It starts shutting itself down ...
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Ignition causing problems with Electrics?? Ford Focus 06

Really hoping someone can help as taken to a mechanics and they keep charging me $$ although they cant find the fault! My computer system in 2006 Ford Focus doesn't work sometimes ( usually at the ...
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1answer
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What computer does a Toyota Corolla use?

I have a 2000 Toyota Corolla. I took it to AutoZone because my check engine light was on, and they plugged in some electronic thing that read the problems. What computer / electronic system is keeping ...
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4answers
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Are there requirements for building a car-PC and it's software?

I am currently rebuilding a car as a hobby. As a part of it I am planning on building in a car PC with custom software for some multimedia usage, navigation and some diagnose usage. I know there are ...
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1answer
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Is there a way to use a PC as an ECU for testing CANBUS Sniffer devices?

Is there a way to connect CANBUS sniffer device to a PC (computer) with CAN-H and CAN-L pairs and test the sniffer device? I want to convert my PC to an ECU emulator, connect a CANBUS sniffer device'...
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Can the warning chime tone of a 2007 BMW 525i be changed, or shortened somehow?

Can the warning chime tone of a 2007 BMW 525i be changed, or shortened somehow? The chime of this car comes from the computer and is used for most warnings such as seatbelt, temperature, door-open, ...
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PCM Bench Testing

1997 Ford F350, 7.3, 2 wheel drive. PCM part number F6TF-12A650-AYG. OK the question is how to diagnose the PCM without codes due to the battery being dead? I have it out of the truck and was hoping ...
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ECM vs. PCM vs. ECU?

Engine Control Module Powertrain Control Module Engine Control Unit Reading about them online, they seem to be the same thing, computers. So what are the spcific difference between them? Is the other ...
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How to control a car (accelerating, braking, steering) programmatically? [closed]

I would like to make a prototype autonomous car out of an off–the–shelf car (Toyota Yaris to be exact, but the instructions should be universal). One of the first steps is to get access to the on-...
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1answer
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Expose Car Hardware information

I am looking for way via which i can access my car information when it is running like speed,acceleration,gear information,oil information,etc . My Car details : Hyundai Verma : Model 2006 , Manual ...
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ECM replacement - starter runs during reprogramming?

(mid-90's Buick) Someone I know had an ECM injector drive output go bad. He got a replacement ECM online, but had to take it to a shop (not a dealer) to get it 'initialized' (If that's the right word....
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Why would my odometer reset to the same mileage whenever I turn off the ignition?

I have a 2000 Nissan Altima and the odometer (not trip meter) reads 86186 miles when I first start the car. As it's driven, the odometer seems to work correctly, incrementing miles. But if I turn off ...
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1answer
7k views

OBD2 to USB Cable for Windows 10

One could put an argument that this question is about software and not mechanics, however now-days everything is computerized (including cars and their diagnostic tools) so I believe this question ...
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2answers
172 views

Fuel Economy Gauge Modification

I have a little digital screen in my dash that re-evaluates my average fuel consumption (L/100km) every thirty seconds. How can I modify this to increase the reporting frequency? Preferably, at least ...
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1answer
393 views

Where is Cadillac CTS 2007 3.6 OBD2 connector?

I changed my pertol cap since old one wore down to the point where I am unsure it will open in petrol station. The one that I got shuts tank ok, but sensor is indicating that cap is open - which in ...
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1answer
173 views

Information from an EEC-IV on 92 Ford F150

Good evening. My general question is, what information, preferably real time, can be obtained from the EEC on a 92 Ford F150? I'm particularly looking to hook up an Arduino and digitizing the gauges ...
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6answers
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Since when is CAN bus mandatory for new vehicles?

The CAN bus Wikipedia page states that: CAN bus is one of five protocols used in the on-board diagnostics (OBD)-II vehicle diagnostics standard. The OBD-II standard has been mandatory for all ...
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1answer
344 views

2006 Solstice - car won't turn over following engine replacement

I recently installed an engine (complete from oil pan to the valve cover) from a 2010 Malibu in my 2006 Solstice. (Replacing a blown engine.) The car will not crank / turn over. Symptoms include: My ...
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684 views

Renault/Dacia Logan 2014+ engine temperature indicator?

the Renault/Dacia Logan 2014 and above have indicators like this: As you can see, the dial at the right has the total mileage and the fuel indicator only. I'm wondering if there is an indicator for ...
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1answer
1k views

Ford Figo Door light on when all doors are closed

I have a Ford Figo 2012, the last few weeks the door light on the dashboard has been on even through, all the doors are closed. (The light only comes on when I start my engine, as expected with Figo's)...
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3answers
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How does the Dodge Avenger know when it's time for an oil change?

Just a couple weeks ago, I took my 2012 Dodge Avenger to the shop for (among other things) an oil change. However, the car is already alerting me that it needs an oil change barely 1,000 miles later. ...
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2answers
772 views

Can I access the signal from the wheel speed sensors?

We have a bunch of trucks in the workplace that drive inside the premises. I want to calculate their exact running time. Currently, we can capture engine hour data by tapping the signal of the ...
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856 views

Convert Manual to Computerized “Automatic”

I'm wondering if this is possible. With a conventional manual transmission (say, Tremec T56), could I install a small computer to press the clutch, change the gears, etc? Obviously, I would have to ...
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1answer
36 views

Is there something that will need to configure with OBD2 or computer if I dissemble?

The new cars has a lot of electronic devices and computers. As I like to maintain my family's cars I would like to know if I don't need to plug any OBD2 or computer after assemble or fix the cars. I'm ...
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1answer
6k views

Manual ECU with Automatic Car

Have 92 Accord with 1.8 VTEC. The Installed Engine is From 98 Accord. The transmission is the original which came with 92 accord. This transmission is operated by Kick Down cable and does not have any ...
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2answers
10k views

Do I need computer reprogramming when transmission is replaced?

Honda Odyssey 2003: I'm replacing a transmission, and a local mechanic will help me to swap it in my garage. I've been told at a local shop, that in order to install remanufactured transmission ...
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2answers
714 views

Trip computer reported MPG with engine remap or chip

A question related to Car average mpg display correctness I suppose, but say if a piggy back chip (e.g. http://www.dieselandpetroltuning.co.uk/) was added to a diesel car with trip computer, would the ...
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4k views

2008 Kia: stalls at idle, disconnect battery reset computer, works now, good to go?

A 2008 Kia Spectra started stalling out when idle. Revving the engine as soon as it started would prevent stalling, but as soon as it dropped below 1500 or so it would stall out again. Check engine ...
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2answers
97 views

Where should I mount the engine management electronics in a 1993 Ford Mustang?

Bought myself a 1993 Ford Mustang (2.3L I4, the 5.0L V8 was sold with it but the car was an I4 from the factory, so it lacks the stronger brakes, suspension, etc. -- The engine would be a drop-in/bolt-...
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2answers
785 views

Do I have to change my speedometer setting if I get larger tires?

I bought a jeep with very small tires (not sure the exact size). I recently bought a new pair of tires that are probably 2 or 3 inches larger radius. Do I have to update my jeep so the speed is ...
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1answer
3k views

How do I find the correct pins in a CAN-BUS connector?

This question might be too technical for this forum, but I'll give it a go. I have a 2012 BMW R1200R motorcycle with CAN-BUS. I'd like to make an Arduino interface to the connector on the bike, but I ...