Additional information about the ECU device (Honda Accord 3)

After carrying out repair work, disconnect the negative battery cable for at least 10 seconds, or remove the ECU power supply fuse. This is necessary to erase the ECU memory. When disconnecting the battery cable, the clock and radio memory are also erased. After connecting the cable or fuse to its original place, check that the LEDs do not light.

Turn on the ignition. The engine management system indicator light should come on for about 2 seconds. If the light does not come on, check the following:

• a) The light bulb burned out.
• b) Fuse #3 is faulty (which causes problems with components such as the reversing light, seat belt control, clock, radio memory).
• c) Open circuit between the fuse and the combination meter.
• d) Open circuit between the combined meter and the ECU module.

After the control lamp and self-diagnosis indicators light up, turn off the ignition. Turn on the ignition again. If the LEDs do not light up, check the following:

• a) The fuse is defective.
• b) Open circuit between ECU and fuse.

The ECU module should be replaced only after checking the reliability of the connection of all contacts and connectors.