Questions tagged [ecu]

Electronic Control Unit. The vehicle computer which controls the functions of the engine based upon input from various sensors. The ECU adjusts different aspects of the engine. PCM, PCU, and ECM can all be considered synonyms.

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ECU leaks current

Im the proud owner of an ER-6F from 2009. I just tested my bike for leaking current and noticed it did. When pulling the fuses I found the ECU to be the culprit. I assume this is not normal. What do i ...
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Nissan Almera ECU replacement using thinkgiag tools

How do I program ECU to Nissan Almera by using thinkgiag tools
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Does OBD-II have any means for reporting current oil pressure?

I recently had the low oil pressure warning light come on in my car. After letting the engine cool down, the warning was gone and I was able to drive home (which was just a few km) with no issues. I ...
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how to minimally connect MT-05 so that the LIN communication works

I have an MT05 (DELPHI-II) on the my desk. I tried to communicate with him via LIN, but he didn't answer. I provide the following links: ground, power, ignition and LIN (image below). When I connect ...
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Can i use old ecu on replacement enigine with same model number

so basically head gasket went in my zafira, engine number z16xep. After all the damage to pistons and cylinder etc it is cheaper to get replacement engine.. that's what I did. Its the same 1.6 twin ...
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Chip tuning simultaneously decreasing fuel consumption and increasing performance

Recently, I came across the webpage of a tuning shop where the shop claims that by doing chip tuning they can simultaneously achieve superior performance and less fuel consumption (based on how they ...
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What OBD tool I can use to retard/advance ignition timing? I like to experiment on GM Suburban to burn hydrogen instead of gas

I know Hydrogen burns much faster, so in order to use this fuel in a modern car, the ignition timing tables must be modified. Is it possible to modify the timing so the ignition happens after tdc or ...
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Engine overheating while temp gauge is normal, malfunction ECU due reverse battery connection

A week ago my 2.4L 2009 sonata started transmission shifting problems and the mechanics told me replace the transmission fluid. The mechanics removed the battery and and started flushing transmission ...
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How can i read the 5WP4 208?

i've tried to get the ECU software of my Skoda Felicia lx 1.3 MPI (ECU:047906030B SIEMENS 5WP4248) with the MPPS V13.02, but sadly it couldn't find my ECU. Can someone suggest me a piece of hardware ...
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Do monster Truck Engines have an ECU/ECM

so I was designing a body for the CRD Monstertruck mod for BeamNG.Drive, (so I could design the body within the game before making it IRL) and when considering the engine (I'm coding the JBeam file ...
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What are all the relays and circuitry on the fuse box of a modern car for? [closed]

I have a Peugeot comfort teepee that seems to be going senile and all the faults lead to the fuse box. It started with permanently on reverse lights. Intermittent windscreen wiper and headlights etc.
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Dodge Grand Caravan Won't Turn Over

I have a Dodge Grand Caravan 2001 that was having running rough and the exhaust smelled like raw gas. I replaced some sensors and that didn't work so I decided to replace the ECU. I got a new ECU from ...
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Mitsubishi mirage Code P1590 A/T torque reduction req. comm

The check engine light on my mitsubishi mirage is on and upon scanning the codes, I am getting the following codes: U0131 EPS CAN timeout U0101 T/M CAN timeout U0121 ABS/ASC CAN timeout P1590 A/T ...
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How to find schematics of a PCB?

I have the following ECU Accent 2012 1.4L, 4-Cyl, 4-speed transmission board in the picture, I have searched for the information written on this product but couldn't find any schematics. Is there a ...
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I wanted to change my ecu, will buy used ecu and reprogram on my mercedes c180 w205

I wanted to change my ecu, will buy used ecu and reprogram on my mercedes c180 w205 is that possible? How do I go about it
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Subaru Forester - petrol coming out unlit in bursts out exhaust. Ideas on what could cause it?

I've got a Subaru Forester '02 2.5L that I push kind of hard off road on New Zealand beaches. I had a near dead battery recently so bought a new one but on replacing it I must have wiped the ECU ...
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What are the factors that rev hang depend on? Does rev hand depend on the engine load?

I know that rev hangs are intentionally introduced to modern vehicles that operate on electronic throttle bodies, by programming the ecu to close the throttle valve slowly (in gasoline engines) even ...
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Does car ECU subtract atmospheric pressure from MAP reading

In calculation of MAF (g/sec), Does the ECU subtract local atmospheric pressure (baro sensor reading) from Manifold Absolute Pressure (MAP sensor reading) to determine the actual air mass entering the ...
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How to open Ford PCM

I have a 2008 Sport Trac with a dying PCM whose symptoms overwhelmingly suggest that it has one or more bad electrolytic capacitors. It's likely to be an easy repair... assuming I can figure out how ...
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Turboing a 4B11

I own a 2015 base model lancer with the 4b11 and I want to turbo it so I’m going to get another 4b11 and put all my mods on it and when it’s done pull my stock engine and put the built one in my ...
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ECU after engine swap

I have a 2005 wrx, previous owner engine swapped it to the STI short block (EJ257) so now it’s a 2.5 instead of a 2.0, i’m trying to buy an accessport for it, but i don’t know which one to get because ...
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What kinds of tuning can ruin a car's ability to pass emissions testing?

Suppose I want to tune a car for performance, like doing an ECU re-map for a Toyota Supra. Could this affect the car's ability to pass emissions testing? If so, how? And in general, what kinds of ...
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VW Jetta 2000 ECU swap

I've read the forums and my question isn't answered. I have swapped my 2.0 to 1.6 in my 2000 Jetta still using my 2.0 ecu for the 1.6l engine. Is it safe? How will the fuel economy be and any effects?
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How to find out if your ECU has been reflashed?

Vehicle 2010 Audi A4 Quattro, 2.0L TFSI engine, automatic transmission, 180,000 km. Recent History Friend bought this car used 2 months ago from a private party. The check engine light comes on with a ...
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ECU tuning exhaust - why?

When a sports exhaust is fitted to a car apparently a re-tune of the ECU is required. For a simple example consider a regular unmodified normally aspirated petrol car which then has a sports exhaust ...
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I have a 2000 ford contour 2.0 runs fine but will not get any faster then 40 mph no matter how much throttle I give,

Motor runs fine transmission shits fine has full rpm range all gears but at 40 it will not run any faster no matter how much throttle you give
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Rough idle and stop when I first start the engine in the morning

I have 2005' Legacy 2.0 4AT. Problem 1 As I mentioned in the subject. When I first start to the engine it's quickly working but somehow if I try to change gear to D it stops (sometimes it's not but ...
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Understanding ECU hex changes for language change

Is there a way to understand the ECU files hex changes applied by the software? I'm new to ECU files and struggling to understand possible areas of interest in the file. For example, when the language ...
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Daihatsu Materia 2005 model 1.5 engine smother while driving

we have a Daihatsu materia 2005 , we replaced the plugs,cam sensor , petrol pump, body sensor, air intake temp and catelis converter. The car drive fine when cold, but after a few kilometres it doesn’...
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Why Long Term Fuel Trims Remains in Negative?

Dear Experts here im attaching log of 1SZ-FE, 1.0L engine for your kind consideration, please advice why my LTFT remains in -ive though MAF, Intake Air Temp sensor, ECT sensor and O2 sensor is working ...
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Vehicle is stationary but live data from ECU says Vehicle Speed is 255 km/h, throwing codes P0717 & P0793 and no reversing

I'm repairing Toyota Harrier ACU# (Automatic transmission) with no reversing problem. When gear is shifted to R she throws codes P0717 (input speed sensor A no signal) and P0793 (Intermediate shaft ...
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Low LTFT, high STFT

Disclaimer: I am a novice, so I possibly have made many errors during the process. I have a Mercedes-Benz A Class w168 (2001). It has a problem that sometimes, when running low RPMs it shuts down (...
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Will disconnecting battery lead to remaps being reset?

Civic Coupe VTI 1999. If car has been remapped, will disconnecting battery for a long time cause any remaps to be reset?
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Will ECU with slightly different part number work for my 2001 Toyota Camry?

I would like to replace ECU of my 2001 Toyota Camry (1MZ engine) because it has very high fuel consumption. The part number of current ECU is 89661-33880. I couldn't find an ECU with the exact same ...
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Ford Figo not starting immobilizer

I have a ford figo 2012 petrol automatic that is not starting. When I turn the ignition to “ON”, all the lights on the dashboard come on and the immobilizer light blinks. The car used to start before. ...
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E34 BMW V8: unusual CAMshaft sensor signal voltage from ECU

My BMW is an E34 with an M60 engine (OBDI) and one morning started idling and running poorly enough to not be drivable. Unplugging the camshaft sensor with the engine running made no change to the way ...
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Volkswagen GTI OBDII Readiness

I have a 2015 Volkswagen GTI SE (2.0T) which is (a little over) due for an emissions test. A few weeks ago I had some rear-end bumper damage repaired, and while in the shop they cleared the trouble ...
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Shall I disconnect an EFB start/stop car battery before charging it?

I have a 64Ah EFB car battery in a 2018 Volkswagen car with start/stop technology. I have an Optimate 5 charger which supports EFB and AGM start/stop batteries:https://optimate1.com/om5ss/ I would ...
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New ECM, car will not crank, VIN is programmed correctly

I have a 2013 2.5L Chevy Malibu LS, which had a bad ECM (Water got in and destroyed part of the board causing random sensor errors and randomly killing the car when driving, randomly deciding not to ...
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Random Battery Voltage Drops

I have a 2008 Pegout 207 that does not start anymore, since the car has parked for a while, I assumed it was the battery (the battery icon was flashing). Even with a new battery the car does not start,...
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OBD2 Scanner can not detect ECU 2002 Mitsubishi Lancer

I bought a OBD2 Bluetooth scanner online. However, when I connect it to the OBD2 port in the car, the app while connecting to the OBD2 scanner gives an error message that it cannot connect to the cars ...
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2003 GSXR 600 ECU Toast?

So I've been back and forth with why my bike keeps fouling a plug in cylinder 4. Intermittent firing and real poor performance. Motor would shut down while in 4th gear. Sketchy clutch at start, super ...
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I have a seemingly very hard wiring problem to solve

Further to my last question : I have a Renault Clio 1.2 2010 that keeps coming up with a P0638 (Throttle Actuator Control Range/Performance) error (according the the OBD2 device I have). One thing I ...
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Delphi MT05 ECU mph to kph

Is there an ignition key sequence for changing MPH to KPH reading for a Delphi MT05 ECU? The bike is a Brixton BX125, had to perform a hard reset of the ECU to clear out a fault code and that switched ...
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Can I find out the unique code of my original car ECU?

I recently got my ECU changed although it was not causing any symptoms. I was still able to use my car with my original ECU. After getting my ECU changed, my original ECU does not seem to work anymore....
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How are new cars (with HO2Ss) affected by cold starts?

New cars have H2OSs to warm the O2Ss. Is this, and any other new tech in new cars, enough to remove all the negative effects of a cold start? How does a cold engine behave differently now (2019) ...
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Siemens sim2k-34vr ecu parametrs and service ids

I need to read parametres like RPM of the engine from siemens sim2k-34vr ECU from obd2 port through K-line protocol,I tried standard service id 0x01 to read current data but ECU said 0x01 service id ...
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Is it possible to reset the mileage of relatively new vehicles and is there a way to identify whether milate has been reset?

In my country, people believe that some vehicle sellers reset the mileage of vehicles to a lower number when selling the vehicles. I want to know whether it is actually possible to do this in modern ...
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2004 Vitz door/trunk control(ler?) problem

I have a 2004 Vitz which uses a key with built in 1 button remote. This remote is supposed to unlock the doors and allow the boot switch to operate. (Car is started with a regular key) The doors work ...
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Secondhand ECU recoding

I have a Passat 1.6 blue motion 2014 and the car has suddenly becomes immobile when trying to start and responds with many warning lights,on occasions it does start and run but not for long.I have ...
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