It's under the carpet at the front passenger floorboard. Pull up the carpet a little from the top and you'll see a small glass window directly on the floorboard in the middle which contains a flashing red light when the key is on accessory mode. Count the flashes to find the trouble code.
How i reset the computer on Honda civic ex 2.000
If a Honda Civic is over revving than there may be a problem with the ECU. One of the functions of the ECU is to prevent the engine from over revving.
what are the wires to power up the ecu on a 1994 Honda civic si
Black box top of engine on side, lid lifts up, fuses below.
in the ecu
The main chip of a 1995 Honda Civic is found inside the ECU. The chip is clipped on, on the upper left side of the ECU.
behind the passenger side kick panel
For an OBD2-b (1999+) civic, the TCU is built inside the ECU.
Passenger side bottom right next to the door
the last 4 numbers
below on the right. by the passengers leg
A wiring diagram, for your 1999 Honda Civic, can be obtained from most Honda dealerships. The wiring diagram can be found at most auto-parts stores.