DTC P0506 Idle Air Control System-Rpm Lower Than Expected: DTC Detecting Condition

TEST CONDITION SPECIFICATION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	Monitoring high deviation between Target Idle Speed and Actual Engine Speed	Restriction in intake or exhaust system A stuck or binding throttle body Poor connection or damaged harness Faulty ETC system
Enable Conditions	Coolant temp. > 73°C (163°F) Pedal value=0 & Vehicle speed=0 Idle speed controller active (idle status) 11 < Battery voltage < 16 After engine start > 20 sec. No relevant failure
Threshold Value	Actual engine speed-Target idle speed < 100 RPM
Diagnostic Time	21 sec.
MIL On Condition	2 Driving Cycles