Accord L4-1955cc 2.0L SOHC FI (1987)
"D4").
Idle speed should remain: 750 ± 50 rpm (in "D3" or "D4")
9. Check the idle speed with headlights, heater blower, rear window defroster, and cooling fan on but air conditioner off.
It should be the same as normal idle speed.
NOTE: If the idle speed is not within specifications, see Symptom-to-Sub System Chart. see Diagnosis by Symptom / Idle Control System. See:
Computers and Control Systems/Testing and Inspection