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Mothinator · 03-08-2009, 02:37 PM

Hi everyone,

I have a '03 Hyundai Elantra which I believe is ISO (OBD pins 4,5,7,8,12,14,16 are populated). I haven't been able to find a definitive source to tell me it is ISO though.

Anyway, I built the ISO interface to the specifications on the google code page. However, when I plug it in, I get an ISO9141 init failed error. I'm using v125 of the code. I've checked the connections and the all seem to be fine.

Is there anyway to determine if this is a problem with the chip or with the car? Are there parameters in the code that may need to be changed?

I'm new to microelectronics (this is only my second project), so its possible I'm missing something obvious.

Thanks for your help.

03-08-2009, 02:37 PM	#331 (permalink)
Mothinator EcoModding Lurker Join Date: Mar 2009 Location: California Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	ISO9141 init failed Hi everyone, I have a '03 Hyundai Elantra which I believe is ISO (OBD pins 4,5,7,8,12,14,16 are populated). I haven't been able to find a definitive source to tell me it is ISO though. Anyway, I built the ISO interface to the specifications on the google code page. However, when I plug it in, I get an ISO9141 init failed error. I'm using v125 of the code. I've checked the connections and the all seem to be fine. Is there anyway to determine if this is a problem with the chip or with the car? Are there parameters in the code that may need to be changed? I'm new to microelectronics (this is only my second project), so its possible I'm missing something obvious. Thanks for your help.