Toyota RAV4 manuals

Toyota Sienna Service Manual: Idle Control System Malfunction

DTC P0505 Idle Control System Malfunction

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.

DESCRIPTION

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 are met:

Example: If the actual idling speed varies from the target idling speed by more than 200 rpm* 5 times in a drive cycle, the ECM illuminates the MIL and sets the DTC.

*: Threshold idling speed varies according to the engine load.

MONITOR DESCRIPTION

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

 

INSPECTION PROCEDURE

HINT:

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

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to the ON position.
  3.  Turn the tester on.
  4.  Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
  5.  Read the DTCs.

Result

Result

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

2 CHECK PCV HOSE CONNECTIONS

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

3 CHECK INTAKE SYSTEM

  1. Check the intake system for vacuum leakage.

OK: No leakage from intake system.

4 CHECK THROTTLE VALVE

  1. Check the throttle valve condition.

OK: No foreign objects between the throttle valve and housing.

REPLACE ECM

Brake Switch
DTC P0504 Brake Switch "A" / "B" Correlation DTC P0724 Brake Switch "B" Circuit High DESCRIPTION The stop light switch is a duplex system that transmits two signals: S ...

Cold Start Idle Air Control System Performance
DTC P050A Cold Start Idle Air Control System Performance DESCRIPTION This monitor will run when the engine is started at -10 to 50C (14 to 122F) of the engine coolant temperature. The DTC will se ...

Other materials:

Removal
1. REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH LH 2. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG LH 3. REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY 4. REMOVE FRONT DOOR TRIM BOARD SUBASSEMBLY LH 5. REMOVE SEAT MEMORY SWITCH  Disengage the 4 claws and remove the seat memor ...

Power window regulator motor
INSPECTION 1. INSPECT POWER WINDOW REGULATOR MOTOR (FRONT RH)  Remove the power window regulator motor.  Apply battery voltage to the motor connector according to the table below. NOTICE: Do not apply battery to any terminals except terminals 1 and 2. Standard 2. INS ...

DTC check / clear
1. DTC CHECK/CLEAR (USING INTELLIGENT TESTER:)  DTC check  Connect the intelligent tester to the DLC3. Turn the ignition switch to the ON position.  Read the DTCs on the tester screen.  DTC clear  Connect the intelligent tester to the DLC3. &n ...

В© 2011-2025 Copyright www.tsienna.net