DTC P0505: Idle Control System Malfunction: Procedure

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

   Result	Proceed to
   P0505 is output	A
   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 3 .

   OK

   PCV hose is connected correctly and is not damaged.

NG → See step   9 

OK: Go to next step 

1. Check the air induction system for vacuum leaks. Refer to ON-VEHICLE INSPECTION - Step 3 .

   OK

   No leaks in air induction system.

NG → See step   10 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

   HINT: 

   • When performing the Active Test, make sure the shift lever is in P or N.
   • The A/C switch and all accessory switches should be off.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
5. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP 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 the Active Test is completed.

   OK

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

   Standard

   -	EGR Step Position (Active Test)
   	Step 0	Step 0 to 30
   Idling condition	Steady idling	Idling changes from steady to rough idling or engine stalls
   MAP (Data List)	20 to 40 kPa (150 to 300 mmHg)	MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed

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.

NG → See step   13 

OK: Go to next step 

1. 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 → See step   11 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
5. Read the DTCs.
   RESULT
   
   

   Result	Proceed to
   P0505 is output	A
   No DTC is output	B

B → END 

A → See step   12