P0507

DTC PO5O7
IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED (ISC - H)

Description
- Idle air control solenoid valve consists of an air cut valve, duty control valve, intake air passage and a coolant passage.
- Air cut valve contains a bimetallic substance which responds to coolant temperature, and a duty control valve which is operated by a signal sent from Engine Control Module (ECM).
- When engine coolant temperature is low, air cut valve is fully opened by the action of the bimetallic substance so that the air flow required for low engine coolant temperatures is maintained.
- ECM controls duty control valve to bring the operating engine speed as close to preset idle speed as possible.

DTC Detecting Condition
Two consecutive trips with fault.

Trouble Symptom
Engine keeps running at higher revolution than specified idling revolution.





1. Check DTC P0505 on display.

2. Check air intake system.
a. Turn ignition switch to "ON".
b. Start engine and idle it.
[CHECK]: Check intake manifold, idle air control, solenoid valve and throttle body for loose installation and gasket for cracks.
Check by-pass hose for loose connection and cracks.
Check vacuum hoses for disconnections.
[YES]: Repair air suction and leaks.
[NO]: Replace idle air control solenoid valve.