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Home >> Acura >> 2003 >> MDX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Performance System Self-Diagnostics >> Diagnostic Tests >> DTC P0507: Idle Control System Rpm Higher Than Expected

DTC P0507: Idle Control System Rpm Higher Than Expected

CAUTION: When substituting or replacement of PCM is recommended, see PCM REMOVAL & REPLACEMENT  for important precautions.
  1. Turn ignition on. Using Honda PGM Tester or the HDS, do the DTC CLEAR in the CLEAR menu.
  2. Start engine. Hold engine speed at 3000 RPM with no loads (A/T in Park or Neutral) until radiator fan comes on, then let engine idle for 2 minutes.
  3. Test under the following conditions:
    • Engine coolant temperature more than 156°F (70°C).
    • Intake air temperature more than 32°F (0°C).
    • More than 15 seconds elapsed after stating engine.
    • Vehicle not moving.
    • Fuel trim between 0.73 and 1.47.
    • Fuel feedback in closed loop.
  4. Using the Honda PGM Tester or the HDS, monitor OBD STATUS for DTC P0507 in the DTCs menu. If it is FAILED, check for vacuum leaks, go to next step. If it PASSED, problem is intermittent, system is OK at this time. If it is EXECUTING, keep the condition continual until a result comes in. If it is OUT OF CONDITION, go to step  3 and recheck.
  5. Turn ignition on. With the Honda PGM tester or the HDS, do PCM RESET in the CLEAR menu. Do the PCM idle learn procedure. See PCM IDLE LEARN PROCEDURE  . Go to next step.
  6. Start engine. Hold engine speed at 3000 RPM with no loads (A/T in Park or Neutral) until radiator fan comes on, then let engine idle for 2 minutes.
  7. Test under the following conditions:
    • Engine coolant temperature more than 156°F (70°C).
    • Intake air temperature more than 32°F (0°C).
    • More than 15 seconds elapsed after stating engine.
    • Vehicle not moving.
    • Fuel trim between 0.73 and 1.47.
    • Fuel feedback in closed loop.
  8. Check for Temporary DTCs or DTCs in the DTC menu. If DTC P0507 is set, go to  1 and recheck. If any other Temporary DTCs or DTCs are set, troubleshoot those indicated. If Temporary DTCs or DTCs are not set, go to next step.
  9. Using the Honda PGM Tester or the HDS, monitor OBD STATUS for DTC P0507 in the DTCs menu. If it is PASSED, troubleshooting is done. If it FAILED, go to step  1 and recheck. f it is EXECUTING, keep the condition continual until a result comes in. If it is OUT OF CONDITION, go to step  7 and recheck.
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