ECU resetting after BROLA install yes or no?
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From: nj
ECU resetting after BROLA install yes or no?
I am trying to decide if I should reset my ECU after installation of the exhaust by disconnecting the battery?
Does anyone know if there is any downside to doing this?
Thanks
DMonte
Does anyone know if there is any downside to doing this?
Thanks
DMonte
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Joined: Mar 2003
Posts: 532
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From: Long Island, NY
I don't think that there is any reason to disconnect the battery if you do exhaust mods since nothing is measured by the ECU in the exhaust. If you did INtake mods, I would think it would be a good idea to disconnect it.
don't think that there is any reason to disconnect the battery if you do exhaust mods since nothing is measured by the ECU in the exhaust. If you did INtake mods, I would think it would be a good idea to disconnect it.
It takes 24 hours according to the shop manual to reset the ECU if you just pull the battery.
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
Thread Starter
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Joined: Nov 2002
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From: nj
Originally posted by MannishBoy
It takes 24 hours according to the shop manual to reset the ECU if you just pull the battery.
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
It takes 24 hours according to the shop manual to reset the ECU if you just pull the battery.
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
I guess I'm just not really sure what the ECU exactly does, by resetting it will that just speed up the process of equaling out the power again it seems like a lot of people are losing their gained performance after a while because of the ECU.
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From: Arkansas
hell, why don't you just do this every morning when you get in the car, then you don't have to worry about the ECU learning your mods and erasing the gains.
I'd like to see someone thats had an exhaust and intake for a while go get a dyno done, then do this pedal thing to clear the ECU then dyno again to see the difference.
I'd like to see someone thats had an exhaust and intake for a while go get a dyno done, then do this pedal thing to clear the ECU then dyno again to see the difference.
So would I! If this sequence truely resets the ECU then theoretically one should see an increase in HP with a mod, then a loss of HP back to baseline then a regaining of HP after this resetting.
This would be a great experiment for someone who has the services of a Dyno!
Anyone?......Anyone?.....
This would be a great experiment for someone who has the services of a Dyno!
Anyone?......Anyone?.....
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Joined: Mar 2003
Posts: 532
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From: Long Island, NY
Originally posted by peptidbond
Umm, are not the O2 sensors in the exhaust system? Not sure what kind of information the ECU would be able to glean from the sensors, but I suspect that an abundance of O2 would mean that a mod has been installed. Just a conjecture.
Umm, are not the O2 sensors in the exhaust system? Not sure what kind of information the ECU would be able to glean from the sensors, but I suspect that an abundance of O2 would mean that a mod has been installed. Just a conjecture.
Originally posted by D_Nyholm
umm, aren't the O2 sensors BEFORE the exhaust? That would mean that the exhaust would have nothing to do with the O2 sensors and their readings. The only thing they may read differently is the amount of flow, but O2 sensors do not read that, only the ratio of air to exhaust/unburnt fuel.
umm, aren't the O2 sensors BEFORE the exhaust? That would mean that the exhaust would have nothing to do with the O2 sensors and their readings. The only thing they may read differently is the amount of flow, but O2 sensors do not read that, only the ratio of air to exhaust/unburnt fuel.
Originally posted by MannishBoy
It takes 24 hours according to the shop manual to reset the ECU if you just pull the battery.
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
It takes 24 hours according to the shop manual to reset the ECU if you just pull the battery.
You can also do it this way:
1) Make sure the ignition is switched off.
2) Wait at least 10 secs, then switch On (not started)
3) Wait 3 seconds
4) Press and release accelerator quickly 5 times within 5 seconds
5) Wait 7 seconds
6) Fully push and hold accelerator for 10 seconds until the MIL starts to blink
7) Release accelerator (you are in diagnostic mode)
8) To erase, press the accelerator fully and hold for at least 10 seconds
Idle Air Volume Learning Description:
“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
_ Each time electric throttle control actuator or ECM is replaced.
_ Idle speed or ignition timing is out of specification.
Without CONSULT-II
NOTE:
_ It is better to count the time accurately with a clock.
_ It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
1. Perform EC-50, "Accelerator Pedal Released Position Learning" .
2. Perform EC-51, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL goes off.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, “Idle Air Volume Learning” will not be carried
out successfully. In this case, find the cause of the incident by referring to the “DIAGNOSTIC PROCEDURE”
“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
_ Each time electric throttle control actuator or ECM is replaced.
_ Idle speed or ignition timing is out of specification.
Without CONSULT-II
NOTE:
_ It is better to count the time accurately with a clock.
_ It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
1. Perform EC-50, "Accelerator Pedal Released Position Learning" .
2. Perform EC-51, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL goes off.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, “Idle Air Volume Learning” will not be carried
out successfully. In this case, find the cause of the incident by referring to the “DIAGNOSTIC PROCEDURE”
