check out these links i found, i couldnt' find an 89:

http://hybrid2.honda-perf.org/tech/codes.html
http://www.iapecc.com/ecu_codes.htm
http://tech.hybridgarage.com/tech/codes.html
http://www.geocities.com/octapimp/ecucodes.html
http://londonautoclub.kicks-ass.org/..._CEL_Codes.htm

a couple pages of how-to's on checking the code.. u might want to double check that..