DTC P0506 Idle Air Control System-Rpm Lower Than Expected: DTC Detecting Condition
DTC DETECTING CONDITION CHART
| ITEM |
DETECTING CONDITION |
POSSIBLE CAUSE |
| DTC Strategy |
- Compare engine speed and nominal idle speed in idle state
|
- Restriction in intake or exhaust system
- Carbonustment of the 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: 10 sec.
- Canister purge control < 70%
|
| Threshold Value |
- Target idle speed - Engine speed > 100 RPM (Engine speed too low)
|
| Diagnostic Time |
|
| Fail Safe |
- Evaporative System monitoring is inhibited
|