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

DTC DETECTING CONDITION CHART

Item	Detecting Condition & Fail Safe	Possible Cause
DTC Strategy	Monitor deviation between target idle speed and actual engine speed	Restriction in intake or exhaust system Adjustment of the accelerator cable Contact resistance in connectors Faulty ISCA
Enable Conditions	Coolant temperature > 74°C (165°F) Throttle angle: closed Vehicle speed = 0 20 seconds after engine start. Engine load < 1000mg/rev. 10V < Battery voltage < 16 No relevant failure
Threshold Value	Target idle speed-Engine speed < -100rpm (Engine speed too low)
Diagnostic Time	16 seconds
Mil On Condition	2 Driving Cycles