DTC P050A-00: Cold Start Idle Control System Performance [10/2014 - 09/2017]: Procedure

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A-00)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P050A-00 is output	A
DTC P050A-00 and other DTCs are output	B

HINT:

If any DTCs other than P050A-00 are output, troubleshoot those DTCs first.

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - 09/2015] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2015 - 09/2016] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2016 - 09/2017]

Result:

See step 2

READ VALUE USING TECHSTREAM (FUEL TRIM)

HINT:

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

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Short FT Bank 1 and Long FT Bank 1.

Powertrain > Engine > Data List

Tester Display
Short FT Bank 1
Long FT Bank 1

Read the values displayed on the Techstream at engine idle.

Add together the Short FT Bank 1 and Long FT Bank 1 values to obtain the total fuel trim.

Standard

Total of Short FT Bank 1 and Long FT Bank 1 values is between -20% and 20%.

Result

Proceed to
OK
NG

Result:

See step 12

Result:

See step 3

INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE VALVE)

Check that there are no deposits around the throttle valve and throttle valve condition.

No deposits around the throttle valve and throttle valve moves smoothly.

Result

Proceed to
OK
NG

Result:

See step 10

Result:

See step 4

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A-00)

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the freeze frame data.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P050A-00.

Check the DTC judgment result.

Result

Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P050A-00 is output)	B

Result:

CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2014 - ]

Result:

See step 5

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)

Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2014 - ]

HINT:

Repair any problems.

Result

Proceed to
NEXT

Result:

See step 6

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A-00)

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the freeze frame data.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P050A-00.

Check the DTC judgment result.

Result

Result	Proceed to
ABNORMAL (DTC P050A-00 is output)	A
NORMAL (DTC is not output)	B

Result:

END

Result:

See step 7

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)

Disconnect the mass air flow meter sub-assembly connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
C1-5 (VG) - C20-92 (VG)	Always	Below 1 Ω
C1-4 (E2G) - C20-91 (E2G)	Always	Below 1 Ω
C1-5 (VG) or C20-92 (VG) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 8

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

Replace the mass air flow meter sub-assembly.

Refer to REMOVAL [10/2014 - ]

HINT:

If the results of the inspections performed in step 16 indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly.
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
Refer to INITIALIZATION [10/2014 - 05/2019]

Result

Proceed to
NEXT

Result:

See step 9

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

HINT:

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the freeze frame data.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P050A-00.

Check the DTC judgment result.

Result

Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P050A-00 is output)	B

Result:

END

Result:

REPLACE ECM. Refer to REMOVAL [10/2014 - 05/2019]

REPAIR OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY

Repair or replace the throttle with motor body assembly.

Refer to REMOVAL [10/2014 - ]

HINT:

Perform "Inspection After Repair" after repairing or replacing the throttle with motor body assembly.

Refer to INITIALIZATION [10/2014 - 05/2019]

Result

Proceed to
NEXT

Result:

See step 11

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A-00)

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the freeze frame data.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P050A-00.

Check the DTC judgment result.

Result

Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P050A-00 is output)	B

Result:

END

Result:

See step 5

CHECK PCV SYSTEM

Check the PCV hose connections.

Refer to PROCEDURE - Step 2

PCV valve and hose are connected correctly and are not damaged.

Result

Proceed to
OK
NG

Result:

See step 20

Result:

See step 13

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Refer to ON-VEHICLE INSPECTION [10/2014 - ]

No leaks from the intake system.

Result

Proceed to
OK
NG

Result:

See step 19

Result:

See step 14

CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

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

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

Result

Proceed to
OK
NG

Result:

See step 18

Result:

See step 15

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)

Operate the VVT system through the Active Test, and check if the VVT system is operating normally.

Perform the Active Test, referring to DTC P0011-00 Procedure (VVT system for intake camshaft).
Refer to PROCEDURE - Step 2
Perform the Active Test, referring to DTC P0014-00 Procedure (VVT system for exhaust camshaft).
Refer to PROCEDURE - Step 2

Result

Proceed to
OK
NG

Result:

See step 17

Result:

See step 16

READ VALUE USING TECHSTREAM (MASS AIR FLOW SENSOR)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor, Coolant Temperature and Engine Speed.

Powertrain > Engine > Data List

Tester Display
Engine Speed
Mass Air Flow Sensor
Coolant Temperature

Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.

Read Mass Air Flow Sensor with the engine speed at 3000 rpm.

Standard

Techstream Display	Condition	Specified Condition
Mass Air Flow Sensor	Shift lever position: N A/C: Off Engine Speed: 3000 rpm	Between 6.0 gm/sec and 18.0 gm/sec

Result

Proceed to
OK
NG

Result:

See step 4

Result:

See step 5

CHECK AND REPAIR VVT SYSTEM

Check and repair the VVT system.

HINT:

Refer to DTC P0011-00 Procedure for intake camshaft.
Refer to DTC P0011-00: Camshaft Position "A" - Timing Over-Advanced or System Performance Bank 1; DTC P0012-00: Camshaft Position "A" - Timing Over-Retarded Bank 1 [10/2014 - ]
Refer to DTC P0014-00 Procedure for exhaust camshaft.
Refer to DTC P0014-00: Camshaft Position "B" - Timing Over-Advanced or System Performance Bank 1; DTC P0015-00: Camshaft Position "B" - Timing Over-Retarded Bank 1 [10/2014 - ]

Result

Proceed to
NEXT

Result:

See step 11

REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

Replace the air cleaner filter element sub-assembly.

Result

Proceed to
NEXT

Result:

See step 11

REPAIR OR REPLACE INTAKE SYSTEM

Repair or replace the intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

Refer to INITIALIZATION [10/2014 - 05/2019]

Result

Proceed to
NEXT

Result:

See step 11

REPAIR OR REPLACE PCV HOSE

Repair or replace the PCV valve or hose.

Result

Proceed to
NEXT

Result:

See step 11