OBD-II problem - Subaru WRX Forum
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#1 Old 05-02-2004, 11:34 PM
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OBD-II problem

I have an 04 STI, when I hooked up my snap on scanner to scan the CEL i have no communication with the ECU. I'm not able to get into the factory ECU to verify that my CEL is caused by the replacement performace exhaust system(no cats). Is there another way of pulling codes out of the system or do you have to hook something else up(like a connector) to allow the scanner to communicate with the ECU. i am planning on putting on a o2 sim as soon as i can verify the code in the system.

Thanks For The Input

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#2 Old 05-03-2004, 10:04 AM
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Its hard to understand what you are getting at. All I know is that with my OBDII Scanner I have an OBD II connector cable that plugs in under then Steering wheel, which then goes into my palm pilot. You then have to sync the OBD II program with your ECUs OBD II Signal. If you already have the cable that plugs in under the steering wheel and you still don't have a connection, either you have the wrong type of connector, the wrong program, or some other software problem. The only other thing it could be is that the 04s use a different system. That's all I can think of.

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#3 Old 05-03-2004, 11:20 AM
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i service the car collision industry and have used this tool on other cars many times. the snap on tool is an odb-II generic scanner i know that i have the right connections the only thing that i can think of is that the 04's are somewhat different. i can clear the light buy disconnecting the battery for a few minutes. Is there another way on the subarus to get codes without the scanner?
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