Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014TT9
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 - 08/2018]
Title: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: P050500; Idle Control System; 2018 MY Camry [06/2017 - 08/2018]

DTC

P050500

Idle Control System

DESCRIPTION

The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle body with motor assembly; 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; 5) the ECM, which controls the electronic throttle control system. 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

Note

P050500

Idle Control System

The idle speed differs largely from the target idle speed (2 trip detection logic).
  • Electronic throttle control system
  • Intake system
  • PCV hose connection
  • EGR valve assembly
  • ECM

Comes on

DTC stored
  • SAE Code: P0505
  • DTC for Mexico Models: Does not apply

MONITOR DESCRIPTION

The ECM monitors the idle speed and idling air flow volume to conduct idle speed control. The ECM determines that the idle speed control system is malfunctioning if either of the following conditions is met:

  • The difference between the target engine idle speed and actual engine idle speed exceeds the threshold and the idle control correction value is stuck at the upper or lower limit for 5 seconds or more.
  • After driving at a vehicle speed of 10 km/h (6 mph) or more, the difference between the target and actual engine idle speed exceeds the threshold 5 times or more during a driving cycle, and then the system determines that the idle control correction value is stuck at the upper or lower limit, or that the idle control correction value has been changed by an amount that exceeds the threshold.

MONITOR STRATEGY

Related DTCs

P0505: Idle speed control system functional check

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

Continuous

Duration

5 seconds

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module)

P0011 (VVT system - advance)

P0012 (VVT system - retard)

P0013 (Exhaust VVT oil control solenoid)

P0014 (Exhaust VVT system - advance)

P0015 (Exhaust VVT system - retard)

P0016 (VVT system - misalignment)

P0017 (Exhaust VVT system - misalignment)

P0031, P0032, P101D (Air fuel ratio sensor (sensor 1) heater)

P0101, P0102, P0103 (Mass air flow meter)

P0107, P0108 (Manifold absolute pressure)

P0116, P0117, P0118 (Engine coolant temperature sensor)

P011B (Engine coolant temperature/intake air temperature sensor correlation)

P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor)

P0125 (Insufficient coolant temperature for closed loop fuel control)

P014C, P014D, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor (sensor 1))

P0171, P0172 (Fuel system)

P0300, P0301, P0302, P0303, P0304 (Misfire)

P0335, P0337, P0338 (Crankshaft position sensor)

P0340, P0342, P0343 (Camshaft position sensor)

P0365, P0367, P0368 (Exhaust camshaft position sensor)

P0401 (EGR system (closed))

P0500 (Vehicle speed sensor)

P0657, P2102, P2103, P2111, P2112, P2119 (Throttle actuator)

P11EA, P11EC, P11ED, P11EE, P11EF, P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance)

P2228, P2229 (Atmospheric pressure sensor)

Engine

Running

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. Idle control correction value

-7 Nm or less, or 15 Nm or more for 5 seconds or more

2. Both of the following conditions C and D met

-

C. Frequency that all of following conditions (a), (b) and (c) 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) Idle control learning value (value when last idle)

-5 Nm or less, or 10 Nm or more

(c) Vehicle condition

Stopped after being driven at 10 km/h (6.25 mph) or more

D. Amount of change Idle control correction value

-12.09 Nm or less, or 7.16 Nm or more

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2018 - 2024 MY Camry [03/2017 -        ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2018 - 2024 MY Camry [03/2017 -        ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON [A].
  7. Turn the Techstream on.
  8. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the A/C switch and all the accessories off [B].
  9. Idle the engine for 5 minutes or more [C].

    HINT:

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

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
  11. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  13. Input the DTC: P050500.
  14. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • If the judgment result is INCOMPLETE, perform steps [E] through [F].
    • [A] to [D]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
  15. 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.

  16. Repeat step [E] 5 times.
  17. Enter the following menus: Powertrain / Engine / Trouble Codes [F].
  18. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  19. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  20. Input the DTC: P050500.
  21. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [F]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

HINT:

  • The following conditions may also cause DTC P050500 to be stored:
    1. If the floor carpet or floor mat is resting slightly on 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 is not fully released.
  • Refer to "Data List / Active Test" [Engine Speed, ISC F/B Learn Torque and ISC F/B Torque].

    Click here 2018 MY Camry [03/2017 - 08/2018]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST

  • Read Freeze Frame Data using the Techstream. 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.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050500)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P050500 is output

A

DTC P050500 and other DTCs are output

B

HINT:

If any DTCs other than P050500 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK PCV VALVE AND HOSE CONNECTIONS

(a) Check the PCV hose connections.

(b) Check the PCV valve.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; A25A-FKS (EMISSION CONTROL): PCV VALVE: INSPECTION

OK:

PCV hose and PCV valve are connected correctly and are not damaged.

NG

REPAIR OR REPLACE PCV VALVE OR HOSE
OK

3.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; A25A-FKS (INTAKE / EXHAUST): INTAKE SYSTEM: ON-VEHICLE INSPECTION+

OK:

No leaks from the intake system.

HINT:

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

Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NG

REPAIR OR REPLACE INTAKE SYSTEM
OK

4.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

HINT:

The A/C switch and all accessories should be off.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Engine Speed, Intake Manifold Absolute Pressure and Coolant Temperature.

Powertrain > Engine > Active Test

Active Test Display

Control the EGR Step Position

Data List Display

Engine Speed

Intake Manifold Absolute Pressure

Coolant Temperature

(f) Check the engine idling condition and Intake Manifold Absolute Pressure values in the Data List while performing the Active Test.

NOTICE:

  • Do not leave the EGR valve open for 10 seconds or more during the Active Test.
  • Be sure to return the EGR valve to step 0 when the Active Test is completed.
  • Do not open the EGR valve 30 steps or more during the Active Test.

OK:

The value of Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position.

Standard:

-

Control the EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Idling condition

Steady idling

Idling changes from steady to rough idling or engine stalls

Intake Manifold Absolute Pressure

(Data List)

Intake Manifold Absolute Pressure value is 20 to 40 kPa(abs)

(2.9 to 5.8 psi(abs))

(EGR valve is fully closed)

Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

HINT:

During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.

OK

GO TO STEP 6

NG

5.

INSPECT EGR VALVE ASSEMBLY

(a) Remove the EGR valve assembly.

Click here 2018 - 2020 MY Camry [03/2017 - 10/2020]; A25A-FKS (EMISSION CONTROL): EGR VALVE: REMOVAL

(b) Check if the EGR valve is stuck open.

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NG

REPLACE EGR VALVE ASSEMBLY

OK

6.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE)

(a) Check the throttle body with motor assembly condition.

OK:

Throttle valve is not contaminated with foreign matter and moves smoothly.

HINT:

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

Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NG

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

OK

7.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

8.

CONFIRM WHETHER DTC OUTPUT RECURS (DTC P050500)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Trouble Codes.

(c) Read the pending DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P050500 is output

B
A

END
B

REPLACE ECM