DTC P050A: Cold Start Idle Air Control System Performance; DTC P050B: Cold Start Ignition Timing Performance [12/2017 - 07/2018]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC P050A or P050B is output	A
   DTC P050A or P050B and other DTCs are output	B

   HINT: 

   If any DTCs other than P050A or P050B are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2017 - 07/2018] )

Result: 

A 

See step  2

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.
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%.

Result: 

NG 

See step  5

Result: 

OK 

See step  3

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.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

Result: 

B 

See step  14

Result: 

A 

See step  4

1. Replace the throttle with motor body assembly (Refer to REMOVAL [06/2016 - ] ).

Result: 

NEXT 

See step  14

1. Check the PCV hose connections (Refer to ON-VEHICLE INSPECTION [06/2016 - ] ).

   OK

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

Result: 

NG 

See step  10

Result: 

OK 

See step  6

1. Check the intake system for vacuum leaks (Refer to ON-VEHICLE INSPECTION [06/2016 - ] ).

   OK

   No leaks from the intake system.

Result: 

NG 

See step  11

Result: 

OK 

See step  7

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.

Result: 

NG 

See step  12

Result: 

OK 

See step  8

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 P000A inspection procedure (VVT system for intake camshaft) (Refer to PROCEDURE - Step 2 ).
   2. Perform the Active Test, referring to DTC P000B inspection procedure (VVT system for exhaust camshaft) (Refer to PROCEDURE - Step 2 ).

Result: 

NG 

See step  13

Result: 

OK 

See step  9

Refer to PROCEDURE - Step 14

Result: 

OK 

See step  14

Result: 

NG 

See step  15

1. Repair or replace the PCV valve or hose.

Result: 

NEXT 

See step  14

1. Repair or replace the intake system.

Result: 

NEXT 

See step  14

1. Replace the air cleaner filter element sub-assembly (Refer to PROCEDURE - Step 2 ).

Result: 

NEXT 

See step  14

1. Check and repair the VVT system.

   HINT: 

   • Refer to DTC P000A Inspection Procedure (VVT system for intake camshaft) (Refer to DTC P000A: Camshaft Position "A" - Timing Slow Response Bank 1; DTC P000C: Camshaft Position "A" - Timing Slow Response Bank 2; DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0021: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2) [12/2017 - ] ).
   • Refer to DTC P000B Inspection Procedure (VVT system for exhaust camshaft) (Refer to DTC P000B: Camshaft Position "B" - Timing Slow Response Bank 1; DTC P000D: Camshaft Position "B" - Timing Slow Response Bank 2; DTC P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1); DTC P0024: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2) [12/2017 - ] ).

Result: 

NEXT 

See step  14

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs (Refer to DTC CHECK / CLEAR [06/2016 - ] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
7. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
8. Input the DTC: P050A or P050B.
9. Check the DTC judgment result.
   RESULT
   
   

   Result	Proceed to
   NORMAL (DTC is not output)	A
   ABNORMAL (DTC P050A or P050B is output)	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2016 - ] )

Result: 

B 

See step  15

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 [06/2016 - ] ).

   HINT: 

   Repair any problems.

Result: 

NEXT 

See step  16

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs (Refer to DTC CHECK / CLEAR [06/2016 - ] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
7. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
8. Input the DTC: P050A or P050B.
9. Check the DTC judgment result.
   RESULT
   
   

   Result	Proceed to
   ABNORMAL (DTC P050A or P050B is output)	A
   NORMAL (DTC is not output)	B

Result: 

B 

END 

Result: 

A 

See step  17

Refer to PROCEDURE - Step 3

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  18

1. Replace the mass air flow meter (Refer to REMOVAL [06/2016 - ] ).

   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.

Result: 

NEXT 

See step  19

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs (Refer to DTC CHECK / CLEAR [06/2016 - ] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
7. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
8. Input the DTC: P050A or P50B.
9. Check the DTC judgment result.
   RESULT
   
   

   Result	Proceed to
   NORMAL (DTC is not output)	A
   ABNORMAL (DTC P050A or P050B is output)	B

Result: 

A 

END 

Result: 

B 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )