Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-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 any other dtcs output (in addition to dtc p0505)

  8. Check pcv hose connections

  9. Check air induction system

  10. Check throttle valve

DTC P0505 Idle Control System Malfunction


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DESCRIPTION

The idling 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 (TP) sensor, which detects the opening angle of the throttle valve; 4) the Accelerator Pedal Position (APP) sensor, which detects the accelerator pedal position; and 5) the ECM, which controls the ETCS.
Based on the target idling speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

DTC No.
DTC Detection Conditions
Trouble Areas
P0505
Idling speed continues to vary greatly from target idling speed (2 trip detection logic)
  1. ETCS
  2. Air induction system
  3. PCV hose connection
  4. ECM

MONITOR DESCRIPTION

The ECM monitors the idling speed and idling air flow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if the following conditions apply:
  1. The learned idling air flow volume remains at the maximum or minimum volume 5 times or more during a drive cycle.
  2. While driving at 6 mph (10 km/h) or more, the actual engine idling speed varies from the target idling speed by between 100 rpm and 200 rpm, 5 times or more during a drive cycle.
Example:
  1. If the actual idling speed varies from the target idling speed by more than 200 rpm* 5 times during a drive cycle, the ECM illuminates the MIL and sets the DTC.
    *: Threshold idling speed varies with engine load.


    The following conditions may also cause DTC P0505 to be set: 4Runner


MONITOR STRATEGY


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

TYPICAL ENABLING CONDITIONS


The monitor will run whenever these DTC is not present
None
Engine
Running

TYPICAL MALFUNCTION THRESHOLDS


Either of following conditions 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
Less than - 100 rpm, or more than 150 rpm
(b) Vehicle condition
Stop after vehicle was driven by 6.25 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 valve
1.3 L/sec. or less, or 8.5 L/sec. or more

INSPECTION PROCEDURE

HINT:
  1. The following conditions may also cause DTC P0505 to be set:
    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.
  3. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on.

  1. Turn the tester on.

  1. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read DTCs.

    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 DTC CHART
A
next down

2.CHECK PCV HOSE CONNECTIONS
OK:
PCV hose is connected correctly and is not damaged.


NGnext
REPAIR OR REPLACE PCV HOSE
OK
next down

3.CHECK AIR INDUCTION SYSTEM

  1. Check the air induction system for vacuum leakage.

    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.

    OK:
    Normal


NGnext
REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
OK
next down
REPLACE ECM