DTC P050A: Cold Start Idle Air Control System Performance: Procedure

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read 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 21

A: Go to next step

READ VALUE USING TECHSTREAM (FUEL TRIM)
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 and ECT / Data List / Short FT #1 and Long FT #1.
5. Read the values displayed on the Techstream at engine idle.
6. Add together the Short FT #1 and Long FT #1 values to obtain the total fuel trim.
  Standard
  
  Total of Short FT #1 and Long FT #1 values is between -20% and 20%.
NG → See step 5

OK: Go to next step
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE)
1. Check that there are no deposits around the throttle valve and throttle valve condition.
  OK
  
  No deposits around the throttle valve and throttle valve moves smoothly.
OK → See step 14

NG → See step 4
REPAIR OR REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY
1. Repair or replace the throttle body with motor assembly. Refer to REMOVAL [05/2013 - ] .
  HINT:
  
  Perform "Inspection After Repair" after repairing or replacing the throttle body with motor assembly. Refer to INITIALIZATION [05/2013 - ] .
NEXT → See step 14
CHECK PCV SYSTEM
1. Check the PCV hose connections. Refer to COMPONENTS [05/2013 - ] .
  OK
  
  PCV valve and hose are connected correctly and are not damaged.
NG → See step 10

OK: Go to next step
CHECK INTAKE SYSTEM
1. Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION [05/2013 - ] .
  OK
  
  No leaks from the intake system.
NG → See step 11

OK: Go to next step
CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Visually check that the air cleaner filter element is not excessively contaminated with dirt or oil.
  OK
  
  The air cleaner filter element is not excessively contaminated with dirt or oil.
NG → See step 12

OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)
1. Operate the VVT system through the Active test, and check if the VVT system is operating normally.
  1. Perform the Active Test, referring to DTC P0011 inspection procedure (VVT system for intake camshaft). Refer to PROCEDURE - Step 2 .
  2. Perform the Active Test, referring to DTC P0014 inspection procedure (VVT system for exhaust camshaft). Refer to PROCEDURE - Step 2 .
NG → See step 13

OK: Go to next step
READ VALUE USING TECHSTREAM (MAF). Refer to PROCEDURE - Step 6
OK → See step 14

NG → See step 15
REPAIR OR REPLACE PCV HOSE
1. Repair or replace the PCV valve or hose. Refer to REMOVAL [05/2013 - ] .
NEXT → See step 14
REPAIR OR REPLACE INTAKE SYSTEM
1. Repair or replace the intake system.
  HINT:
  
  Perform "Inspection After Repair" after repairing or replacing the intake system. Refer to INITIALIZATION [05/2013 - ] .
NEXT → See step 14
REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Replace the air cleaner filter element sub-assembly.
NEXT → See step 14
CHECK AND REPAIR VVT SYSTEM
1. Check and repair the VVT system.
  HINT:
  - Refer to DTC P0011 Inspection Procedure (VVT system for intake camshaft). Refer to INSPECTION PROCEDURE .
  - Refer to DTC P0014 Inspection Procedure (VVT system for exhaust camshaft). Refer to INSPECTION PROCEDURE .
NEXT: Go to next step

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A)

NOTE:

In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2013 - ] .
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F).
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P050A.

Check the DTC judgment result.

RESULT

Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P050A is output)	B

B → See step 15

A → See step 22

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER CONNECTOR CONNECTION)
1. Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [05/2013 - ] .
  HINT:
  
  Repair any problems.
NEXT: Go to next step

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A)

NOTE:

In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2013 - ] .
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F).
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P050A.

Check the DTC judgment result.

RESULT

Result	Proceed to
ABNORMAL (DTC P050A is output)	A
NORMAL (DTC is not output)	B

B → END

A: Go to next step

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM). Refer to PROCEDURE - Step 3
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
REPLACE MASS AIR FLOW METER
1. Replace the mass air flow meter. Refer to REMOVAL [05/2013 - ] .
  HINT:
  - If the results of the inspections performed in step 9 indicated no problem, proceed to the next step without replacing the mass air flow meter.
  - Perform "Inspection After Repair" after replacing the mass air flow meter. Refer to INITIALIZATION [05/2013 - ] .
NEXT: Go to next step

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

NOTE:

In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2013 - ] .
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F).
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P050A.

Check the DTC judgment result.

RESULT

Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P050A is output)	B

B → See step 20

A → END

REPLACE ECM. Refer to REMOVAL [05/2013 - ]
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [05/2013 - ]
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [05/2013 - ]