SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P0505

DTC Code DTC Name
P0505 Idle Control System Malfunction

DESCRIPTION

The idle speed is controlled by the ETCS (Electronic Throttle Control System). The ETCS is comprised of: 1) the one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; and 5) the ECM, which controls the ETCS. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0505 Idle Control System Malfunction Idle speed continues to vary greatly from the target idle speed (2 trip detection logic).
  • Electronic throttle control system

  • Intake system

  • PCV hose connections

  • ECM

Comes on DTC stored

MONITOR DESCRIPTION

The ECM monitors the idle speed and idling air flow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if either of the following conditions is met:


MONITOR STRATEGY

Required Sensors/Components (Main) Electronic throttle control system
Required Sensors/Components (Related)

Crankshaft position sensor

Engine coolant temperature sensor

Vehicle speed sensor

Frequency of Operation Once per driving cycle
MIL Operation 2 driving cycles

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met 1 or 2
1. Both of the following conditions A and B met -
A. Engine speed - Target engine speed

Less than -100 rpm, or higher than 150 rpm (A/C off and NSW off)

Less than -100 rpm, or higher than 200 rpm (A/C on or NSW on)

B. IAC flow rate learned value 0.9 L/sec. or less, or 6 L/sec. or more for 5 seconds or more
2. Both of the following conditions C and D met -
C. Frequency that both of following conditions (a) and (b) met 5 times or more
(a) Engine speed - Target engine speed

Less than -100 rpm, or higher than 150 rpm (A/C off and NSW off)

Less than -100 rpm, or higher than 200 rpm (A/C on or NSW on)

(b) Vehicle condition Stopped after being driven at 10 km/h (6.25 mph) or more
D. Either of the following conditions is met (c) or (d)
(c) IAC flow rate learned value 0.9 L/sec. or less, or 6 L/sec. or more
(d) Amount of change of IAC flow rate learned value +2.56 L/sec. or more, or -2.56 L/sec. or less

CONFIRMATION DRIVING PATTERN

A01KBC4E26

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on [A].

  6. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [B].

  7. Idle the engine for 5 minutes or more [C].

    Tech Tips

    In order to keep the idling stable, turn off the A/C and all other electric loads and do not perform any shift operations.

  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].

  9. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  11. Input the DTC: P0505.

  12. Check the DTC judgment result.

    GTS Display Description
    NORMAL
    • DTC judgment completed

    • System normal

    ABNORMAL
    • DTC judgment completed

    • System abnormal

    INCOMPLETE
    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [E] and [F].

  13. Accelerate the vehicle to 10 km/h (6.25 mph) or more, and then idle the engine for 20 seconds or more [E].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  14. Repeat step [E] 5 times.

  15. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [F].

  16. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  17. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  18. Input the DTC: P0505.

  19. Check the DTC judgment result.

    GTS Display Description
    NORMAL
    • DTC judgment completed

    • System normal

    ABNORMAL
    • DTC judgment completed

    • System abnormal

    INCOMPLETE
    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

CAUTION / NOTICE / HINT

Tech Tips


  • The following conditions may also cause DTC P0505 to be stored:


    1. The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open.

    2. The accelerator pedal being not fully released.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  • Refer to "Data List / Active Test" [Engine Speed, ISC Feedback Value and ISC Learning Value].

    Click here

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P0505 is output A
      DTC P0505 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0505 are output, troubleshoot those DTCs first.


    B
    A
  2. CHECK PCV HOSE CONNECTIONS


    1. Check the PCV hose connections.

      Click here

      OK
      PCV valve and hose are connected correctly and are not damaged.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  3. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks.

      Click here

      OK
      No leaks from the intake system.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the intake system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  4. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE VALVE)


    1. Check the throttle with motor body assembly condition.

      OK
      Throttle valve is not contaminated with foreign objects and moves smoothly.

      Tech Tips

      Perform "Inspection After Repair" after replacing the throttle with motor body assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0505)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs
    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    10. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P0505 is output A
      DTC is not output B

    A
    B