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

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	Compare engine speed and nominal idle speed in idle state	Restriction in intake or exhaust system Misadjusted accelerator cable Contact resistance in connectors Faulty ISCA valve
Enable Conditions	Vehicle speed = 0 Coolant temperature > 75°C (167°F) Engine load < 840 mg/rev. Throttle angle: closed Minimum time after start: 15sec. Canister purge control < 50%
Threshold Value	Target idle speed-Engine speed > 100rpm (Engine speed too low)
Diagnostic Time	35 sec.
Fail Safe	Evaporative System monitoring is inhibited
MIL On Condition	-