2003 Honda S2000 Owner's Manual - Page 220

If Your Engine Won't Start Diagnosing why your engine won't start falls into two areas, depending on what you hear when you press the ENGINE START button. You hear nothing, or almost nothing. The engine's starter motor does not operate at all, or operates very slowly. You can hear the starter motor operating normally, or the starter motor sounds like it is spinning faster than normal, but the engine does not start up and run. Nothing Happens or the Starter Motor Operates Very Slowly When you press the ENGINE START button, you do not hear the normal noise of the engine trying to start. You may hear a clicking sound or series of clicks, or nothing at all. Check these things: Your car has the Immobilizer System. You should use a properly-coded master or valet key to start the engine (see page 59 ). A key that is not properly coded will cause the immobilizer system indicator in the dash panel to blink rapidly. Turn the ignition switch to ON (II). Turn on the headlights and check their brightness. If the headlights are very dim or don't light at all, the battery is discharged. See Jump Starting on page 226 . Press the ENGINE START button, then release it. If the headlights do not dim, check the condition of the fuses. If the fuses are OK, there is probably something wrong with the electrical circuit for the ignition switch or starter motor. You will need a qualified technician to determine the problem. (See Emergency Towing on page 245 .) 224 Taking Care of the Unexpected