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Hey I’m new and just got an 88 celica, does it have a diagnostic port for OBD or OBDII? I don’t really know anything about this car so I’m gonna be relying on this forum a lot
 

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Procedures to Retrieve Trouble Codes - Toyota Engine Control Systems (toyotaguru.us) Don't know if this will help you. If you can obtain a service manual it will give step by step how to retrieve any codes. On my '91 there is a port under the hood close to the firewall on the driver side, little flip up plastic cover. A bent paperclip in the right contact points will show readouts with a blinking cel on your dash. Don't know if this is the same on your '88.
 

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Hi GBaez20,
It does have an OBD port on it. My 89 has it on the driver side near top of the engine bay. It says Diagnostic on it. But as far as I can find no handheld diagnostic reader will work with it. Even though they came with the Toyota OBD connector. But the easier way to pull codes is like Sea-J wrote take a paper clip and connect pins E and T1.
 
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