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I don't think it has one. You have to pull back the the carpet on passenger side and look at the ecu. Place key into ignition turn to on position and count the number of blinks it gives you. It may give you more then one code so be careful as to your count and amount of codes. you can e-mail and I will let you know what each one stands for. valrey71@hotmail.com is your engine light staying on?

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15y ago
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Q: Where is diagnostic plug for Honda CRX 1989crx?
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