How to read OBD1 trouble codes in 1995 and older Honda and Acura vehicles without using a scanner.. In my case I had trouble code 14 which indicated a bad ECU (computer).. I personally don't disconnect the battery when removing/installing the ECU and I've never had a problem.. But it's probably a smart thing to do.. That way you fully restore power to the ECU all at once instead of partially restoring as you connect each of the 3 harnesses..

ECU/TCU Removal How To:   • 94-97 Honda Accord Computer Removal: ...  
Honda/Acura Trouble Codes:https://axleaddict.com/auto-repair/Ho...
ECU Identification Info:https://www.hondata.com/tech-ecu-iden...
Eric The car Guy Vid:   • How To Pull Honda Codes Without a Sca...  
Example : Acura (Integra) OBD1 Code Reading:https://www.acuraworld.com/index_file...