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Home/Acura/RDX/Acura RDX I facelift (2009-2012)/Repair manual/Testing & Diagnostics/Idle Control System: Overview
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Idle Control System: Overview Acura RDX I facelift

Testing & Diagnostics 1 illustration ~1108 words

Scheme 304

Scheme 304: Component Location Index
Scheme 304: Component Location Index

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle 20 seconds or more.
  4. Check under these DATA LIST parameter conditions with the HDS: ECT SENSOR 1 above 158 °F (70 °C) IAT SENSOR above 32 °F (0 °C) Vehicle speed is 0 mph (0 km/h) ST FUEL TRIM between 0.69-1.47 FSS is CLOSED
  5. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the HDS indicate FAILED? YES -Go to step 6. NO -If the HDS indicates PASSED, go to step 15 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 4 and recheck.
  6. Remove the charge air cooler (see «REMOVAL»(ref-513843-S00579136532012111600000) ) and intake air duct (charge air cooler outlet tube) (see «TURBOCHARGER AND EXHAUST MANIFOLD REMOVAL AND INSTALLATION»(ref-513843-S10459103682012111600000) ).
  7. Check for dirt, carbon, or damage in the throttle bore. Is there dirt, carbon, or damage in the throttle bore? YES -If there is dirt or carbon, clean the throttle body (see «THROTTLE BODY TEST»(ref-513845-S25603876972012111600000) ). Also check for damage to the air cleaner element (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-513845-S33658369072012111600000) ), then go to step 9. If there is damage in the throttle bore, go to step 8. NO -Check the A/C system or power steering system, then go to step 9.
  8. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-513845-S33658369072012111600000) ).
  9. Reset the PCM with the HDS.
  10. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513856-S30291526352012111600000) ).
  11. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle 20 seconds or more.
  12. Check under these DATA LIST parameter conditions with the HDS: ECT SENSOR 1 above 158 °F (70 °C) IAT SENSOR above 32 °F(0°C) Vehicle speed is 0 mph (0 km/h) ST FUEL TRIM between 0.69-1.47 FSS is CLOSED
  13. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0506 indicated? YES -Go to step 1 , and recheck. NO -Go to step 14.
  14. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 13, go to the indicated «DTC'S TROUBLESHOOTING»(ref-513856-S37098811802012111600000). NO -If the HDS indicates FAILED, check the A/C system and/or the power steering system, then go to step 1. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 12.
  15. Remove the charge air cooler (see «REMOVAL»(ref-513843-S00579136532012111600000) ) and intake air duct (charge air cooler outlet tube) (see «TURBOCHARGER AND EXHAUST MANIFOLD REMOVAL AND INSTALLATION»(ref-513843-S10459103682012111600000) ).
  16. Check for dirt, carbon, or damage in the throttle bore. Is there dirt, carbon, or damage in the throttle bore? YES -If there is dirt or carbon, clean the throttle body (see «THROTTLE BODY TEST»(ref-513845-S25603876972012111600000) ). Also check for damage to the air cleaner element (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-513845-S03333557432012111600000) ), then go to step 9. If there is damage in the throttle bore, go to step 8. NO -Go to step 17.
  17. Recheck with different load conditions (turn on the headlights, blower motor, rear window defogger and/or A/C, change the gear position, etc.).
  18. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Intermittent failure, the system is OK at this time. NO -If the HDS indicates FAILED, check the A/C system and/or power steering system, then go to step 1 and recheck. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 12 and recheck.

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle for 20 seconds.
  4. Monitor the OBD STATUS for DTC P0507 in the DTCs MENU with the HDS. Does the HDS indicate FAILED? YES -Go to step 5. NO -If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, recheck with different load conditions (electrical, A/C, gear position, etc.), then go to step 3 .
  5. Check for vacuum leaks at these parts: PCV valve PCV hose EVAP canister purge valve Throttle body Intake air duct (air flow tube) Intake manifold Turbocharger Intake air duct (turbocharger inlet tube and pipe) Intake air duct (turbocharger outlet pipe) Charge air cooler Intake air duct (charge air cooler inlet hose) Intake air duct (charge air cooler outlet tube) Turbocharger bypass control solenoid valve Pressure regulator Brake booster hose Brake booster Are there any leaks? YES -Repair or replace the leaking part(s), then go to step 6. NO -Go to step 6.
  6. Turn the ignition switch to ON (II).
  7. Reset the PCM with the HDS.
  8. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513856-S30291526352012111600000) ).
  9. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle for 20 seconds.
  10. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0507 indicated? YES -Check for poor connections or loose terminals at the throttle body and the PCM, then go to step 1 . NO -Go to step 11.
  11. Monitor the OBD STATUS for DTC P0507 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 10, go to the indicated «DTC'S TROUBLESHOOTING»(ref-513856-S37098811802012111600000). NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the throttle body and the PCM, then go to step 1. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 9.

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