Step "A"
- Ensure IAC valve is connected. Check for DTCs. Ensure timing is correct, spark plugs and air cleaner are okay, and PCV system is operating properly. See SELF-DIAGNOSTICS - INTRODUCTION article. Connect tachometer.
- Set parking brake. Start engine and run at 3000 RPM with no electrical loads (headlights, blower motor, rear defogger, A/C and cooling fan off) and transmission in Park or Neutral. When radiator cooling fan comes on, allow engine to idle. Check idle speed with no electrical loads. See IDLE SPEED SPECIFICATIONS (CIVIC D16Y8 A/T & D16Y7 A/T ENGINES) table.
- If idle speed is as specified and vehicle is equipped with A/C, go to Step "B" . If idle speed is not as specified, remove idle adjusting screw cap located on top of throttle body. If air cleaner is removed to gain access to adjusting screw, DO NOT disconnect Intake Air Temperature (IAT) sensor valve 2-pin connector. Turn idle adjusting screw in 1/2 turn increments, until idle speed is as specified. See IDLE SPEED SPECIFICATIONS (CIVIC D16Y8 A/T & D16Y7 A/T ENGINES) table. Check idle speed after each 1/2 turn. If vehicle is equipped with A/C, after adjustment, go to Step "B" .