DTC P0505: Idle Control System Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read the DTCs.

   Result

   Result	Proceed to
   DTC P0505 is output	A
   DTC P0505 and other DTCs are output	B

   HINT: 

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

B → See step   8 

A: Go to next step 

1. Check the PCV hose connections. Refer to ON-VEHICLE INSPECTION - Step 2 .

   OK

   PCV hose is connected correctly and is not damaged.

NG → REPAIR OR REPLACE PCV HOSE 

OK: Go to next step 

1. Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION .

   OK

   No leaks in intake system.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
5. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.

   HINT: 

   The A/C switch and all accessory switches should be off.

6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
7. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.

   HINT: 

   • 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 Active Test is completed.

   OK

   MAP and idling condition change in response to EGR step position as follows.

   Standard

   -	EGR Step Position (Active Test)
   	0 Steps	0 to 30 Steps
   Idling condition	Steady idling	Idling changes from steady to rough idling or engine stall
   MAP (Data List)	20 to 40 kPa (150 to 300 mmHg) (EGR valve fully open)	MAP value is at least +10 kPa (75 mmHg) 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 EGR valve.

OK → See step   6 

NG → See step   5 

1. Remove the EGR valve assembly. Refer to REMOVAL .
2. Check if the EGR valve is stuck open.

   OK

   EGR valve is tightly closed.

3. Reinstall the EGR valve assembly. Refer to INSTALLATION .

NG → See step   10 

OK: Go to next step 

1. Check for contamination between the throttle valve and the housing, and check that the throttle valve moves smoothly.

   OK

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

NG → See step   9 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTC. Refer to DTC CHECK / CLEAR .
5. Turn the power switch off.
6. Turn the power switch on (IG) and turn the Techstream on.
7. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
8. Start the engine and warm it up.
9. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
11. Read the pending DTCs.

    Result

    Result	Proceed to
    DTC P0505 is output	A
    DTC is not output	B

B → END 

A → See step   11