Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1UR-FE ENGINE CONTROL

DESCRIPTION

MONITOR DESCRIPTION

CONFIRMATION DRIVING PATTERN

INSPECTION PROCEDURE

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

CHECK PCV HOSE CONNECTIONS

CHECK AIR INDUCTION SYSTEM

INSPECT THROTTLE BODY ASSEMBLY

CONFIRM WHETHER DTC OUTPUT RECURS

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 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 idling speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

DTC No.DTC Detection ConditionTrouble Area
P0505Idling speed continues to vary greatly from the target idling speed (2 trip detection logic).
ETCS
Air induction system
PCV hose connections
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 condition is met:


After driving at a vehicle speed of 10 km/h (6.25 mph) or more, the difference between the target and actual engine idling speed exceeds the threshold 5 times or more during a driving cycle, and then the system determines that the IAC flow rate learned value is stuck at the upper or lower limit, or that the IAC flow rate learned value has been changed by an amount that exceeds the threshold.

Dtc P0505 Idle Control System Malfunction. 1UR-FE ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

CONFIRMATION DRIVING PATTERN

Dtc P0505 Idle Control System Malfunction. 1UR-FE ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) and turn the GTS on [A].
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [B].
Idle the engine for 1 minute 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.
Accelerate the vehicle to 10 km/h (6.25 mph) or more, and then idle the engine for 20 seconds or more [D].
  • CAUTION:
  • When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Repeat step [D] 5 times.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
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.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0505.
Check the DTC judgment result.
GTS DisplayDescription
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
N/A
Unable to perform DTC judgment
Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
  • HINT:
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E] again.

INSPECTION PROCEDURE

  • HINT:
The following conditions may also cause DTC P0505 to be stored:
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.
The accelerator pedal being not fully released.
Read freeze frame data using the GTS. 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.
Refer to "Data List / Active Test" [Engine Speed, ISC Feedback Value and ISC Learning Value] ().
1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read DTCs.

Result
ResultProceed to
P0505 is outputA
P0505 and other DTCs are outputB
  • HINT:
  • If any DTCs other than P0505 are output, troubleshoot those DTCs first.
B
GO TO DTC CHART ()
A
2.CHECK PCV HOSE CONNECTIONS

Check the PCV hose connections ().

  • OK:
  • PCV hose is connected correctly and is not damaged.
NG
REPAIR OR REPLACE PCV HOSE ()
OK
3.CHECK AIR INDUCTION SYSTEM

Check the air induction system for vacuum leaks ().

  • OK:
  • No leaks in air induction system.
NG
REPAIR OR REPLACE AIR INDUCTION SYSTEM ()
OK
4.INSPECT THROTTLE BODY ASSEMBLY

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 ASSEMBLY ()
OK
5.CONFIRM WHETHER DTC OUTPUT RECURS

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

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

Read the DTCs.

Result
ResultProceed to
P0505 is outputA
No DTC is outputB
B
END
A
REPLACE ECM ()
1UR-FE ENGINE CONTROL
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
SFI SYSTEM