Dtc P0505 Idle Control System Malfunction

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fbe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

INSPECTION PROCEDURE

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

CHECK PCV HOSE CONNECTIONS

CHECK AIR INDUCTION SYSTEM

CHECK THROTTLE VALVE

DTC P0505 Idle Control System Malfunction


DESCRIPTION

The idling speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) a 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 electronic throttle control system. Based on the target idling speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

DTC No.
DTC Detection Condition
Trouble Area
P0505
The idle speed continues to vary greatly from the target speed (2 trip detection logic).
  1. Electronic throttle control system
  2. Air induction system
  3. PCV hose connection
  4. ECM

INSPECTION PROCEDURE

HINT:
  1. The following condition may also cause DTC P0505 to be stored:
    1. The throttle valve is not fully closed (e.g. the accelerator pedal is slightly depressed by something such as the floor carpet overlapping the accelerator pedal).
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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.
1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P0505 is output
    		A
    DTC P0505 and other DTCs are output
    		B

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


B
GO TO DTC CHART (HILUX_TGN26 RM000000PDF0H4X.html)
A


2.CHECK PCV HOSE CONNECTIONS

  1. Check the PCV hose connection.

    OK:
    PCV hose is connected correctly and is not damaged.


NG
REPAIR OR REPLACE PCV HOSE
OK


3.CHECK AIR INDUCTION SYSTEM

  1. Check the air induction system for vacuum leakage (HILUX_TGN26 RM000001A3W025X.html).

    OK:
    No leakage from air induction system.


NG
REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK


4.CHECK THROTTLE VALVE

  1. Check for contamination between the throttle valve and housing, and check that the throttle valve moves smoothly.

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


NG
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (HILUX_TGN26 RM000000VWO01YX.html)
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)