H!cks

Hi all
Rather unfortunately the battery died on the S and had to be emergency jump started (I know, I know, we were sort of out of options). Anyway, on the restart I noticed the CEL light on. I have a WiFi code reader (very handy btw - on a separate note the Lyl WiFi code reader and Dash Command are very good!) and so I pulled down the code which is a P1607. A quick search looks to show this is an ECM problem (P1607 Engine Control Module (ECM)/Powertrain Control Module (PCM) Internal Circuit Malfunction).

I've searched the forum for advice (including results like this https://www.s2ki.com/s2000/topic/448...rcuit-failure/) and given the flat battery/jump start scenario and hoping its just a minor glitch, but I'm still slightly worried.

So I guess I'm asking what I should do? I can:
a) Clear down the code (but I'm worried that this may affect the PCM/ECM and therefore the keys - can someone confirm that clearing a code isn't going to do this)?
b) Take it straight to Honda all dewey eyed in a fluster and pray to god they don't just say 'you'll need another one mate' (the car seems to drive fine btw, although naturally I haven't gone VTEC)
c) Panic mr Manwaring
d) Something else.

So as ever I bow to your humble experience. Thoughts?
Appreciate as always in advance
Will

BenRNBP

Clear down the trouble code, it's not a reset of anything so you'll be OK.

I'd be praying the jump start didn't put too much current through the ECU because of a dodgy earth connection somewhere (starter motor current draw goes through the ECU and burns out the earth track)

Irish TuneR

ECM, is that the ECU? If it is id do the reset after checking if for any corrosion first.

H!cks

Yes my fingers are praying exactly that. I know you're not supposed to jump start really but we were in a fix. I don't think there are any dodgy earths (the car has always been 100%, of course thats not to say it is now!) but its a nervous time :/ Glad you agree I can clear down the code and see what happens - I was 95% sure I could do that with no ill effects (baring the CEL coming back on of course) but that 5% combined with a very steep inaccessible drive made me think I should seek advice first!

Yes pretty much the same thing. Do you mean reset or clear down of codes?

Cheers
Will

richmc

You know what the code means so clear it.

Next do an ECU reset, (search on here for how)

After the sequence go for a drive and if it doesn't come back relax!

H!cks

But if I do the ECU reset won't I have to re-program the keys etc? Is that as easy as resetting the ECU?

BenRNBP

Hang on do you mean bump start (pushing the car and dropping the clutch) - I'm not sure the ECU likes that, there are similar posts after a spin at the track - clearing code sorts it. The keys are stored in "non-volatile" memory on the ECU which means you can disconnect the power and it'll still remember. The trouble codes are stored in a special bit of memory that is designed to be cleared without affecting anything else - so you'll be fine.

H!cks

No, it was jump started (from the only vehicle around - a Volvo XC60 - using cables) :/
I thought that to reset the ECU you needed to do more than disconnect the power?

BenRNBP

Just wanted to double check, jump starting is fine. The main reason for only pulling the ECU backup fuse is so you don't lose you clock and have to re-enter a radio code - but if you've had a totally flat battery you've probably had to reset your clock anyway!

The only extra thing is leave it to idle for 3 activations of the radiator fan after the ECU reset so it can find its idle point again.

richmc

No just reprogram the radio code. Maybe the alarm if it's not a Honda one.