SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE PERFORMANCE SYSTEM SELF-DIAGNOSTICSDIAGNOSTIC TESTSDTC P0507: IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED (2004 3.5RL)DIAGNOSTIC PROCEDURE
2004 Acura 3.5RL

Diagnostic Procedure

2004 Acura 3.5RLSECTION Diagnostic Procedure
  1. Start engine. Hold engine speed at 3000 RPM with no load and transmission in Park or Neutral until radiator fan comes on, then allow engine to idle. Using scan tool, check idle speed under no-load conditions (all accessories off). If idle speed is 600-700 RPM, problem is intermittent. System is okay at this time. If idle speed is not 600-700 RPM, go to next step.
  2. Turn ignition switch off. Remove cover from IAC thermal valve. See Figure . Start engine and allow to idle. Place finger on valve seat area and check for airflow. If airflow is not present in valve seat area, go to next step. If airflow is present in valve seat area, check coolant level and for air in cooling system. If cooling system is okay, replace IAC thermal valve.
  3. Check for vacuum leaks and ensure throttle valve is fully closed. Repair as necessary. Adjust idle speed. If idle speed cannot be adjusted, replace IAC valve.
NOTE: Perform PCM reset procedure if IAC thermal valve was removed. See PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.