We're having issues with our ignition signal.
When nothing is connected to the IGN_OUTx output, we get a clean 5V ignition signal when starting. When connecting the igniter board to the IGN_OUTx output, the voltage drops to 1,93 V, but the signal remains, if measuring from the Coil x outputs on the igniter board going to our DIS coils, we only have about 0,40V left, but still with the signal in it. This is not enough to have a spark for us unfortunately.
Has somebody here already come across this problem or knows how to fix it? We are out of ideas at the moment.
Thanks in advance!
Ignition signal too low
-
- Posts: 8
- Joined: 22 May 2017, 17:28
- Your CAR: Toyota Yaris 1SZ-FE
- SECU version: official SECU-3T
- Has thanked: 5 times
- Been thanked: 2 times
- STC
- Posts: 13843
- Joined: 30 Apr 2013, 23:41
- Your CAR: AZLK 2140
- SECU version: DIY SECU-3
- Location: North Korea
- Has thanked: 2160 times
- Been thanked: 4335 times
- Contact:
Re: Ignition signal too low
It is normal, because BIP373 consumes some current into base-emitter. It is like a Darlington transistor. 1.92V is base to emitter voltage for BIP373.When connecting the igniter board to the IGN_OUTx output, the voltage drops to 1,93 V, but the signal remains,
I don't understand this. Please clarify measuring conditions.if measuring from the Coil x outputs on the igniter board going to our DIS coils, we only have about 0,40V left, but still with the signal in it
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
Клуб проекта в Facebook https://www.facebook.com/groups/secu3club
Клуб проекта ВКонтакте https://vk.com/secu3club (вступаем!)
Клуб проекта в Facebook https://www.facebook.com/groups/secu3club
Клуб проекта ВКонтакте https://vk.com/secu3club (вступаем!)
-
- Posts: 8
- Joined: 22 May 2017, 17:28
- Your CAR: Toyota Yaris 1SZ-FE
- SECU version: official SECU-3T
- Has thanked: 5 times
- Been thanked: 2 times
Re: Ignition signal too low
Thank you for this answer. We fixed the problem by using another transistor which allows more current to flow through it at the same voltage.
When we were measuring from the coil output on the igniter board, so the output going to the coils of the KMS DIS coil. That's where we got the 0,4 V signal.
When we were measuring from the coil output on the igniter board, so the output going to the coils of the KMS DIS coil. That's where we got the 0,4 V signal.