DTC P050A: Cold Start Idle Air Control System Performance: 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 / Trouble Codes.
5. Read the DTCs.

   Result

   Result	Proceed to
   DTC P050A is output	A
   DTC P050A and other DTCs are output	B

   HINT: 

   If any DTCs other than P050A are output, troubleshoot those DTCs first.

B → See step   16 

A: Go to next step 

HINT: 

Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter.

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2.
5. Read the values displayed on the Techstream at engine idle.
6. Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the total Fuel Trim.

   OK

   Total of Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values is between -20% and 20%.

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   12 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Start the engine and warm it up.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT-iE Linear (Bank 1) or Control the VVT-iE Linear (Bank 2) / VVT-iE Aim Angle #1 and VVT Change Angle #1 or VVT-iE Aim Angle #2 and VVT Change Angle #2.
5. Perform the Active Test operation with the engine speed at 1500 rpm.

   OK

   Active Test Movement Order	Difference between "VVT-iE Aim Angle" and "VVT Change Angle"
   0 deg → 10 deg → 20 deg → 40 deg → 10 deg → 0 deg → 10 deg → END	Within 5 DegFR

NG → See step   8 

OK: Go to next step 

1. Inspect PCV hose connection. Refer to ON-VEHICLE INSPECTION .

   OK

   PCV hose is connected correctly and is not damaged.

NG → See step   9 

OK: Go to next step 

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

   OK

   No leaks from intake system.

NG → See step   10 

OK: Go to next step 

1. Visually check that the air cleaner filter element is not excessively contaminated with dirt or oil.

   OK

   Air cleaner filter element is not excessively contaminated with dirt or oil.

NG → See step   11 

OK: Go to next step 

1. Replace the mass air flow meter. Refer to REMOVAL .

NEXT → See step   15 

1. Check and repair VVT system.

NEXT → See step   15 

1. Repair or replace PCV hose. Refer to ON-VEHICLE INSPECTION .

NEXT → See step   15 

1. Repair or replace intake system. Refer to ON-VEHICLE INSPECTION .

NEXT → See step   15 

1. Replace air cleaner filter element sub-assembly.

NEXT → See step   15 

1. Check for deposits around the throttle valve and throttle valve condition.

   OK

   No deposits around throttle valve and throttle valve moves smoothly.

NG → See step   14 

OK: Go to next step 

1. Replace the ECM. Refer to REMOVAL .

NEXT → See step   15 

1. Repair or replace throttle body assembly. Refer to REMOVAL .

NEXT → See step   15 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear DTCs. Refer to DTC CHECK / CLEAR .
5. Turn the engine switch off and wait for 30 seconds.
6. Turn the engine switch on (IG) and turn the Techstream on.
7. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
8. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
9. Input the DTC: P050A.
10. Check the DTC judgment result.

    OK

    DTC judgment result is NORMAL.

NEXT → END