Can self reset CEL on sunny N16

[Ruggles]

I had disonnected the air sensor on the air box to clean the contact & now the cel is perm on. Can self reset?

[Fuzzylogic]

You can bring your car down to autosaver. They have the CONSULT diagnostic tool that will be able to remove the CEL.

 

Otherwise you can try disconnecting the battery for 5 minutes. That will do a hard reset of the ecu.

[Ruggles]

I did think of disconnecting batt however abt 1 mth back i was at autosaver to tune my idle lower & was told by mech that if ever need to chg batt to leave engine running then chg batt or the lower idle speed setting may run & go back to default fast idle speed. So juz wonder shld i disconn batt to try reset cel?

[Fuzzylogic]

How are u going to change battery with the engine running? The electronics of the car are all dependent on the battery. What he said makes no sense at all.

[Ken4555]

  On 4/20/2010 at 3:29 PM, Ruggles said:

I did think of disconnecting batt however abt 1 mth back i was at autosaver to tune my idle lower & was told by mech that if ever need to chg batt to leave engine running then chg batt or the lower idle speed setting may run & go back to default fast idle speed. So juz wonder shld i disconn batt to try reset cel?

 

hi... which autosaver and which mech pls... thanks....

[Fcw75]

  On 4/20/2010 at 4:35 PM, Fuzzylogic said:

How are u going to change battery with the engine running? The electronics of the car are all dependent on the battery. What he said makes no sense at all.

 

You can change the battery while the engine is running. Just in case you dun know, when the engine is running, it is actually the alternator powering the car and not the battery. The battery is being charged by the alternator at the same time while the engine is running. In other words, the battery is only use to power the electronics on the car when the engine is not running and to start the car engine.

 

I have seen it being done before by a workshop thought I think it's not recommended.

 

Someone please correct me if I am wrong.

Edited April 20, 2010 by Fcw75

[Nlstch]

  On 4/20/2010 at 5:19 PM, Fcw75 said:

You can change the battery while the engine is running. Just in case you dun know, when the engine is running, it is actually the alternator powering the car and not the battery. The battery is being charged by the alternator at the same time while the engine is running. In other words, the battery is only use to power the electronics on the car when the engine is not running and to start the car engine.

 

I have seen it being done before by a workshop thought I think it's not recommended.

Yes, mine car battery was changed this way, while engine was on, the battery was changed. Nothing was affected.

 

For TS, if you don't want the idling speed to be affected, use diagnotic tools to remove, else you will have to spend money to retune again

[Ruggles]

For disconn batt is it sufficient to juz disconn the black terminal only?

Edited April 20, 2010 by Ruggles

[Ruggles]

Use diagnostic tools or hard reset either way also got to spend money haiz

[Yeobh]

Looks like you are not getting reliable and technically correct solution to yr simple problem. You will get more problems if you take most of the adv give to you here and the mech as mentioned by you.

The system will not reset for sure.

The resetting can only be carried out by a code fault reader or scanner.

By disconnecting yr car battery while the engine is running is allowing high amp to get the chance to damage yr electronic/computer system. The alternator current is AC rectified to DC and without the battery in connection the air gap between both terminals is creating a very high resistance and therefore encourage the alternator to pump up more amp. The high amp will need to go somewhere, and this may result in some electronic components partial damage without the mech knowing it ( no smoke).

If you need to disconnect the car battery, what you need is a very simple device that will provide the back-up voltage . It can be plugged either into yr car cigarette lighter socket or OBD socket and powered by a small 9volt or 12volt battery.

Hope this helps

[Fuzzylogic]

  On 4/20/2010 at 5:19 PM, Fcw75 said:

You can change the battery while the engine is running. Just in case you dun know, when the engine is running, it is actually the alternator powering the car and not the battery. The battery is being charged by the alternator at the same time while the engine is running. In other words, the battery is only use to power the electronics on the car when the engine is not running and to start the car engine.

 

I have seen it being done before by a workshop thought I think it's not recommended.

 

Someone please correct me if I am wrong.

 

Ok...thanks for the info. Since the alternator is powering the electronics when running, the idea of voltage stabilisers connected to the battery do nothing for the electrical system then I suppose.

Edited April 21, 2010 by Fuzzylogic

[Yeobh]

This memory saver holds the data codes from the vehicles ECU when the car battery is disconnected. Simply plug straight into the 180pin EOBD socket and attach the battery clips to a slave battery.Very safe ,no way to loose data codes such as keyless, seat, radio, clock etc settings.

Edited April 22, 2010 by Yeobh