Idle Too Low When Warm

SYMPTOM
Warm idle speed too low.

CHECK:
1. Electronic Control Unit *
2. Electronic Air Control Valve (EACV) (14)
3. Air Intake
4. Idle Controls

NOTE:
Numbers in parentheses are the blink codes displayed on the back of the ECU.
* LED on the ECU is not on, or stays on without blinking.