Sfi System - P0505

Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

2Uz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Inspection procedure

  7. Check other dtc output (in addition to dtc p0505)

  8. Check connection of ventilation hose

  9. Check air induction system

  10. Check throttle valve

DTC P0505 Idle Control System Malfunction


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DESCRIPTION

The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of: 1) 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.
DTC Detection Condition
Trouble Area
P0505
Idle speed continues to vary greatly from target speed (1 trip detection logic)
  1. ETCS
  2. Air induction system
  3. Ventilation hose connection
  4. ECM

MONITOR DESCRIPTION

The ECM detects idle speed and idle air flow amount for Idle Speed Control (ISC). The ECM concludes that the ISC is malfunctioning if: 1) the learned value of the ISC remains at the maximum or minimum 5 times or more during a drive cycle, and 2) while driving at 6 mph (10 km/h) or more, the actual idle rpm varies from the target rpm by between 100 to 150 rpm 5 times or more during a drive cycle.
Example:
If the actual idle rpm varies from the target idle rpm by more than 100 rpm* 5 times during a drive cycle, the ECM will turn on the MIL and a DTC is set.
HINT:
*: rpm threshold varies with engine load.

The detection of DTC P0505 may also be caused by: 1) the floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed (throttle position to be slightly open); or 2) the accelerator pedal not being fully released. 4Runner


MONITOR STRATEGY


Related DTCs
P0505: Idle air control malfunction
Required Sensors/Components (Main)
Crankshaft position sensor
Required Sensors/Components (Related)
ECT sensor, Vehicle speed sensor
Frequency of Operation
Once per driving cycle
Duration
10 minutes
MIL Operation
2 drive cycles
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


Monitor will run whenever these DTCs are not present
None
Engine
Running

TYPICAL MALFUNCTION THRESHOLDS


Either of the following condition is met:
Condition 1 or 2
1. Frequency that both of following conditions (a) and (b) are met
5 times or more
(a) Engine RPM - Target engine RPM (A/C OFF and NSW OFF)
Less than -100 rpm, or more than 150 rpm
(b) Vehicle condition
Stop after vehicle was driven at 6 mph (10 km/h) or more
2. Frequency that both of following conditions (a) and (b) are met
Once
(a) Engine RPM - Target engine RPM
Less than -100 rpm, or more than 150 rpm
(b) IAC flow rate learning value
2.48 L/sec or less, or 11 L/sec or more

INSPECTION PROCEDURE

HINT:
  1. The detection of DTC P0505 may also be caused by: 1) the floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed (throttle position to be slightly open); or 2) the accelerator pedal not being fully released.
  2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505)

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON.

  1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read the DTCs.

    HINT:
    If any other codes besides P0505 are output, perform troubleshooting for those DTCs first.

    Result:

    Display (DTC Output)
    		Proceed to
    P0505
    		A
    P0505 and other DTCs
    		B
    HINT:
    If any DTCs other than P0505 are output, troubleshoot those DTCs first.


Bnext
GO TO RELEVANT DTC CHART
A
next down

2.CHECK CONNECTION OF VENTILATION HOSE
OK:
Ventilation hose is connected correctly and is not damaged.


NGnext
REPAIR OR REPLACE VENTILATION HOSE
OK
next down

3.CHECK AIR INDUCTION SYSTEM

  1. Check for vacuum leaks in the air induction system.

    OK:
    No leakage from air induction system.


NGnext
REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
next down

4.CHECK THROTTLE VALVE

  1. Check the throttle valve condition.



NGnext
REPLACE THROTTLE BODY
OK
next down
REPLACE ECM