Car is hard to start and runs rough. Cant get data or codes. Tried everything on my verus. Finally borrowed a red brick from my dealer and get the same results.
94 lexus LS 400 no communication
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Cant even pull codes manually. Can it be a PCM issue? Tried it at the connector inside and the one outside under the hood. -
You could try to scope the data line(s) and see if the PCM is trying to communicate. My past experience with these symptoms has turned out to be a faulty module. HTH.S. BrelandComment
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May be too late for you, but Most of the Early 90's Lexus ecus are starting to fail pretty rapidly. You may get codes for fuel pump controllers or a constant rich idle. If it isn't communicating the ecu is dead.Comment
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