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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0507: Idle Speed Performance Higher Than Excepted >> Testing

DTC P0507: Idle Speed Performance Higher Than Excepted: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If any other DTCs are present, they must be diagnosed and repaired before continuing this test.
  1. Ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Inspect the air induction system for the following problems. Restrictions; dirty air cleaner, foreign material trapped in the air intake tube, etc. Leaks; air intake tube connection, air cleaner housing, etc. Were any problems found? If yes, repair or replace as necessary. If no, go to next step.
  3. Start the engine. Inspect the vehicle for external vacuum leaks. Inspect the engine for internal leaks. Were any vacuum leaks found? If yes, repair the vacuum leak as necessary. If no, go to next step.
    4. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  4. Inspect the throttle plate for carbon build up or other restrictions. Verify that the throttle cable between the accelerator pedal and the throttle body is not binding. Ensure the throttle plate is in the idle position. Remove the IAC motor and actuate the IAC motor with the DRBIII® scan tool to verify proper operation. Install the IAC motor. With the vehicle is running, lightly tap on IAC motor, with your hand, and listen for idle to raise. Were any problems found? If yes, repair or replace as necessary. If no, go to next step.
    5. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  5. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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