2003 PILOT - DTC Troubleshooting: P0505 (14)
DTC P0505: Idle Control System Malfunction
NOTE: If DTC P1519 is stored at same time as DTC P0505, troubleshoot DTC P1519 first, then recheck for DTC P0505.
1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.
2. Check the engine speed at idle with no-load conditions: headlights, blower fan, rear window defogger, radiator fan, and air conditioner off.
3. Disconnect the idle air control (IAC) valve 3P connector.
4. Turn the ignition switch OFF.
5. Remove the intake air duct from the throttle body.
6. Start the engine and let it idle.
7. Put your finger on the lower port (A) in the throttle body.
Does the engine speed drop below 780 rpm?
YES - Adjust the idle speed. If the idle will not adjust properly, replace the IAC valve, and then adjust the idle.
NO - With the throttle valve completely closed, check for vacuum leaks, and repair as necessary. Download File PDF
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