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Engine management light flashing. \ECU reset
Posted: Sat Dec 02, 2017 1:41 pm
by Foxpig
Evening from a newbie.
Can someone please tell me how to reset my ECU as the engine management light continues to flash but bike runs excellent without any problems.
Someone said you can bridge out the diagnostic plug some way but need to confirm please
Re: Engine management light flashing. \ECU reset
Posted: Sat Dec 02, 2017 8:12 pm
by Jge64
List all modifications you’ve done to this vehicle.
Re: Engine management light flashing. \ECU reset
Posted: Sun Dec 03, 2017 5:00 pm
by Foxpig
No modifications standard bike 642 miles
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 1:59 am
by iceman
If you search google (and often it's good to do that and find links to this forum as the search is a bit quirky) you can find lots of info on doing this.
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 6:44 am
by you you
Foxpig wrote:No modifications standard bike 642 miles
Still under warranty? Take it back to the dealer
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 9:49 am
by aguim
You may think it is running well, but it is probably not (with that MIL blinking) : the ECU, sensing a
problem, has self-adjusted to a pre-set, rideable data value for the defective sensor/component.
BASED ON OTHER SIMILAR HONDA SCOOTS :
Now, if you want to know which component is at fault : locate the RED diagnostic plug (DLC), there
should be a BROWN wire there. Jump that brown wire to ground and a code should appear on
your digital display. I have a list of Honda codes coming soon.
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 11:03 am
by aguim
So here are the codes, from both my Metropolitan and Forza (the PCX 125/150 use the same PGM-FI):
- 1: MAP sensor (intake vacuum)
- 7: ETC sensor (coolant temp)
- 8: TPS sensor (throttle opening degrees)
- 9: IAT sensor (int. air temp)
-12: injector
-21: Oxygen sensor
-29: IACV (idle speed air valve
-33: ECU fault
-54: angle sensor (fall safety cut-off)
Jumping the diag-plug Brown wire to ground will show memorized codes, so may help identify
a crazy, intermittent problem.
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 12:33 pm
by aguim
Update: if similar to the Forza, yours will 'blink' the codes:
Long 'blinks' count for 10. Short 'blinks' count for 1. Examples : 8 short blinks=8= TPS ; 2 long ones followed by 1 short=21= O2 sensor. Etc.
Re: Engine management light flashing. \ECU reset
Posted: Mon Dec 04, 2017 1:17 pm
by aguim
I went down and checked with the Metro and it too will 'blink' the fault codes using the MIL light, not show a code number on the digital display (like many other bikes do).
So forget about the digital display, and just count the MIL (engine light) blinks.
MODERATOR, PLEAAASE : EDIT function is useless for people like me who constantly
revise their copy (I'm french thus changing my mind every minute or so...)