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Model specific boards => Golf mk4 => Topic started by: mar_k on 10 October 2012, 20:19

Title: EPC light and no throttle at all,
Post by: mar_k on 10 October 2012, 20:19

I haven't scanned the car yet, Its a AUM with fly by wire.
The EPC light is lit and you can't rev the car at all. The throttle pedal doesn't work at all.

I will scan the car tomorrow but does anyone have any ideas?


I am planning to clean the TB

Title: Re: EPC light and no throttle at all,
Post by: rio_gti on 10 October 2012, 21:56

wire come out the throttle body?? or the pedal?  :undecided:

Title: Re: EPC light and no throttle at all,
Post by: mar_k on 11 October 2012, 07:48

problem found, the ECU is fried, The wires on the bottom 02 sensor have been pulled out so I suspect they have shorted out and fried the ECU.

Title: Re: EPC light and no throttle at all,
Post by: Granta Gti on 11 October 2012, 10:30

 :sad: Doesnt sound good  :sad:

Title: Re: EPC light and no throttle at all,
Post by: topher on 11 October 2012, 18:53

That can happen unfortunately, i've seen it a few times now. Did you scan for faults? there are a couple of codes that can cause the epc light to come on with no throttle, max torque limit exceeded is one that i remember

Title: Re: EPC light and no throttle at all,
Post by: mar_k on 11 October 2012, 20:00

Yep,  I scanned it today

I got ................
accelerator position sensor (g79) signal to high
Lamda sensor (g70) signal to high

Title: Re: EPC light and no throttle at all,
Post by: JimBR on 11 October 2012, 21:55

You got a boost gauge by any chance with the vacuum line coming through the white box under the scuttle?

Title: Re: EPC light and no throttle at all,
Post by: mar_k on 13 October 2012, 13:05

Quote from: JimBR on 11 October 2012, 21:55

You got a boost gauge by any chance with the vacuum line coming through the white box under the scuttle?

No boost gauge fitted, I have confirmed its the ECU, I got the pedal working by crudely wiring in to ground wires at the pedal and it works so the ECU has fired where the grounds are,
Looking for another AUM ECU now, If anyone has one Pm me a price please