8
votes
Accepted
Can a car operate without a catalytic converter?
Most vehicles which are OBD-II compliant (newer vehicles are a little different) use just the O2 sensors located before the cat to adjust the air/fuel ratios. The in-cat or after-cat O2 sensors are ...
- 160k
7
votes
Accepted
Will disconnecting battery lead to remaps being reset?
No, it shouldn't. During a remap, there are tables which the ECU reads to know what/when/how fueling and other events should occur. This is in non-volatile memory. There are other parts of the ECU ...
- 160k
7
votes
Do automakers ECU-tune their motors to make new models and versions?
It's absolutely true that auto manufacturers tune engines to give different performance levels. I had a BMW 530d and discovered it was the same engine as the 535d, the only difference was the ...
- 17.1k
6
votes
Accepted
Cannot Access ABS-control-unit with ODB2-adapter
To my knowledge, access to the ABS module will not be possible through a generic OBDII adapter.
The most commonly available option for VW's of this era is a VAG-COM cable with RossTech software on a ...
- 39.2k
6
votes
1986 truck running rough and intermittent fault codes. Faulty capacitor?
The one in your image seems to have some burn marks so I'd be suspicious about it.
Get yourself an LCR component tester for about €$£10. This will allow you to remove each capacitor, check its ...
- 281
5
votes
Can I replace my ignition coil with a ECU?
There are a number of ways to go solid-state ignition and there are a few open source projects that allow you to build your own ECU and loom and utilize an ignition system from something else.
One ...
- 23.4k
5
votes
Shouldn't my post-cat O2 sensors (lambda probes) be reporting varying numbers?
Here's how to decipher INPA
lambdaintegrator
Short-term fuel trim. Both banks have a short-term correction of 28%.
This should settle down to 0% fairly quickly, so the fact that it stays red ...
- 39.2k
5
votes
Cause of limp mode in Vauxhall Astra which ECU code is relevant?
Essentially you have put 10 milliliters of oil in your gastank
I have done this before with more oil than that on accident into my truck.
My solution was to fill the tank to the top and dilute it as ...
- 32.9k
5
votes
Accepted
Why buy an ECU with the highest version alphabet?
As a general rule, you should buy the part number specified for your car. Later (higher version alphabet) may not be compatible. If it is compatible it is unlikely you will notice a difference since ...
- 306
5
votes
Can't detect Proton GEN2 ECU
When a scantool is unable to connect to a vehicles ECU:
Make sure you have power to the OBDII connector under the dash. (Since the adapter lights up, it means you have power)
Try connecting to a ...
- 634
5
votes
Accepted
Considerations for a successful VW 2004 Jetta 2.0L engine swap in place of a 1.6L engine
It would help if we had the engine codes and the two ecu types (EDC15/16, Med7/9 ect) and the fault codes that are present but here goes:
It sounds like the engine was swapped complete with the ...
- 2,790
5
votes
When doing an engine swap , do you have to have a matching ecu
GM engine management software (from your old Impala ECM) is not going to be able to run a Honda engine. If you managed to flash the Honda software onto your GM ECM, you'd likely brick the device.
A ...
- 3,159
4
votes
What voltage does the ECU need?
If you're talking about a regular 12V battery vehicle, then the ECU is likely to work from 7V until 14V with no problem. That's the usual requirement for this kind of component.
- 217
4
votes
Accepted
Relation of VIN of a car with emission norms of a country it is sold
Cars are manufactured to meet the emission standards of the country it is intended to be sold in. If the car was manufactured in Canada with the intent to be sold in India, it will be designed to meet ...
- 12.2k
4
votes
How to calculate fuel consumption and CO2 emission on flex fuel cars using OBDII data?
"Flex Fuel" isn't an issue (I assume you mean E85 and similar) if you use injector duty cycle as the basis of your calculations. Total injector "on" time gives you fuel consumption, regardless of the ...
- 12.4k
4
votes
Gonna remove my Cat...issues with the ECU 😳?
When the ECU is in closed loop operation is uses the reading obtained from the lambda probe to adjust how much fuel is required by the engine. In order for this to work it has to measure the exhaust ...
- 23.4k
4
votes
How to remove pin from Subaru ECU plug
At the end of each wire is a terminal. In order for the terminal to stay in place while the male pin of the opposing connector is pressed in, there is a small locking tab on the terminal (arrow).
...
- 9,005
4
votes
Accepted
Why modern car networks are known as "unsafe"?
In an ideal world, you are right, the entertainment system should be entirely separate from engine management, navigation, locks, immobiliser etc.
But the world isn't ideal, and many decisions are ...
- 18.6k
4
votes
Accepted
Siemens sim2k-34vr ecu parametrs and service ids
I found its PIDS is under MODE 0x21 and PID 0x01, I hope it helps to other peoples.
- 51
4
votes
Accepted
How are new cars (with HO2Ss) affected by cold starts?
It's true that heated O2 sensors shorten the time the engine is in open loop. So the whole "wasting gas thing" while you wait for the engine to warm up isn't as big an issue. But there are many other ...
- 1,392
4
votes
Original Ecu swap back into my car with correct VIN
The locksmith didn't actually program your keys since keys are stored in the body control module on this model. The programming that needed to be done is called "Parameter reset". This ...
- 3,790
4
votes
Accepted
Charging car battery with charger without disconnecting from car
If you are using your charger on "float mode", you shouldn't have a problem leaving your vehicle battery charging indefinitely. The purpose of the float mode is not to charge the battery, ...
- 160k
4
votes
1986 truck running rough and intermittent fault codes. Faulty capacitor?
It may not be a bad idea to replace the capacitors, but make sure you buy automotive-grade parts rated for 10,000 hours minimum at 100C or more, from recognized distributors like DigiKey, Mouser, ...
3
votes
Shouldn't my post-cat O2 sensors (lambda probes) be reporting varying numbers?
It may depend on how you are gathering that data. Perhaps a "Live Data" OBD Parameter ID or "PID"?
You may need a more specific scan tool or smarter software.
Some (especially higher end) vehicles ...
- 12.4k
3
votes
Accepted
96 Impreza ECU Pinout
The wiring diagram looks correct when comparing against another wiring diagram. I only did a cursory look over comparing random pin colors. Pin 32 should be Light Green/Black.
This may be easier to ...
- 10.7k
3
votes
Cannot Access ABS-control-unit with ODB2-adapter
That particular sensor doesn't check ABS codes. ABS errors are frequently on a different circuit entirely than check engine codes, and that particular device is only checking engine codes.
If you ...
- 5,235
3
votes
Cause of limp mode in Vauxhall Astra which ECU code is relevant?
I'm having trouble seeing the "oil event" and the "limp mode" as being related. When you added the oil, it was – as @DucatiKiller pointed out – only about 10 ml. This went into about 48 liters of fuel....
- 14.5k
3
votes
Accepted
Reading Vehicle Speed Sensor on 2005 Honda Accord from Cruise Control Unit Port
The VSS input pin is probably pulled high by the CCU. The ECM/PCM VSS output can probably only pull it low. If this is the case, you would expect to see what you are seeing. You could use a 10k ...
- 25.5k
3
votes
97 Infiniti J30 died out at stoplight, unknown electrical issue
It sounds like you have a few things going on.
If your OBD scanner reports "error", it's that your ECU isn't
responding. Maybe your ECU isn't getting power, maybe it's defective.
Your power windows ...
- 12.2k
3
votes
Car stalls and won't restart, but disconnecting the battery fixes it?
It sounds like you have an intermitant failing sensor. On most of the systems I have worked with the crank sensor isn't required and wouldn't inhibit the engine from starting. The cam sensor or ...
- 163
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