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Title: Lost power. Ecu not turning on Post by: dilly on April 02, 2019, 05:07:25 AM Was driving to work a few minutes ago and car shut off. Check engine light does not illuminate either. I checked the engine control fuses and those check out. Also changed the ecu on the side of the road and nothing..
04 Jetta gli 1.8t Ecu isn’t turning on so I can’t check codes.... Any ideas? Title: Re: Lost power. Ecu not turning on Post by: adam- on April 02, 2019, 05:19:27 AM Relay?
Title: Re: Lost power. Ecu not turning on Post by: dilly on April 02, 2019, 05:26:07 AM Relay? Well shit. Didn’t think of that on the road in this freezing temp.Got a ride to work guess I have to wait now and see and try my spare relays I have from the other parts cars Thanks for the input man Title: Re: Lost power. Ecu not turning on Post by: Risky on April 02, 2019, 06:33:46 AM Check your battery connections...may sound stupid but I've had this happen to me at a red light. Had changed the battery two weeks prior, connection had just come loose for the negative terminal. Tightened it and was on my way. Other than that, I agree with Adam about the relay.
Title: Re: Lost power. Ecu not turning on Post by: dilly on April 02, 2019, 03:21:22 PM To get off the side of the road I jumped the relay from the sai hot wire and the car runs
Changed the relay under the dash and still nothing. I get continuity on the ground signal wire for the relay to the ecu There is no voltage on the two 12v wires for the main relay unless obviously if I jump it to a battery hot I’m out of ideas Title: Re: Lost power. Ecu not turning on Post by: adam- on April 02, 2019, 11:52:31 PM It's the relay in the bay.
Title: Re: Lost power. Ecu not turning on Post by: dilly on April 03, 2019, 09:25:46 PM It's the relay in the bay. i bought a new relay from vw and changing that by itself didn't do anything. checked the fuses with a volt meter in continuity mode blah blah nothing. took every fuse from a know working parts car and swapped them over and now the car turns on fine etc. BUT odd thing is that i think the EPC light is supposed to stay illuminated when key is on. when i turn the key to the on position, it blinks quick then turns off(blinks as in turn on for a split second then shuts off) can someone verify this for me? Title: Re: Lost power. Ecu not turning on Post by: cessnas on April 04, 2019, 03:55:28 AM The ESP, EML and Traction controll lights are controlled by the ECU if i remember correctly. Why not just measure with on multimeter if the ECU is getting power?
Might be water ingress into the ECU aswell thats causing the problems Title: Re: Lost power. Ecu not turning on Post by: dilly on April 04, 2019, 01:00:09 PM Ecu gets power.. car runs and no errors.
I’m just concerned as to why the epc light just flashes quick instead of staying on when key on Title: Re: Lost power. Ecu not turning on Post by: dilly on April 04, 2019, 04:02:06 PM Interesting outcome here. Decided to make a few changes to my file and reflashed. Epc light now stays on solid with key on like it is supposed to. I guess consider this problem solved?
Weird behavior Title: Re: Lost power. Ecu not turning on Post by: adam- on April 04, 2019, 11:53:12 PM So, what did you change?
Title: Re: Lost power. Ecu not turning on Post by: dilly on April 05, 2019, 10:40:08 AM My changes weren’t influenced by this issue
Just made some changes regarding readiness. |