DTC P050A-00: Cold Start Idle Control System Performance [12/2019 - 10/2022]: Procedure

1. 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: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022] 

Result: 

A 

See step  2

HINT: 

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

1. Start the engine.
2. Read the values displayed on the GTS at engine idle.

   Powertrain > Engine > Data List 

   Tester Display
   Short FT B1S1
   Short FT B2S1
   Long FT B1S1
   Long FT B2S1

3. Add together the Short FT B1S1 and Long FT B1S1 values, and the Short FT B2S1 and Long FT B2S1 values to obtain the total fuel trim.

   Standard

   GTS Display	Specified Condition
   Total of the Short FT B1S1 and Long FT B1S1	Between -20 and 20%
   Total of the Short FT B2S1 and Long FT B2S1	Between -20 and 20%

   Result

   Proceed to
   OK
   NG

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

   Proceed to
   OK
   NG

Result: 

OK 

See step  10

Result: 

NG 

See step  4

Refer to REMOVAL [12/2019 - 10/2022]

HINT: 

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

Refer to INITIALIZATION [12/2019 - 10/2022]

Result

Result: 

NEXT 

See step  16

Refer to COMPONENTS [12/2019 - 10/2022]

OK

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

Result

Result: 

NG 

See step  15

Result: 

OK 

See step  6

1. Check the intake system for vacuum leaks.

   Refer to ON-VEHICLE INSPECTION [12/2019 - 10/2022]

   OK

   No leaks from the intake system.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  14

Result: 

OK 

See step  7

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

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  13

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 P0011-00 Procedure (VVT system for intake camshaft).

      Refer to PROCEDURE - Step 2

   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: 

NG 

See step  12

Result: 

OK 

See step  9

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

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

3. Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.

   Powertrain > Engine > Data List 

   Tester Display
   Engine Speed
   Mass Air Flow Sensor

   Standard

   GTS Display	Condition	Specified Condition
   Mass Air Flow Sensor	Engine warmed up Shift lever position: P A/C: Off Engine Speed: 3000 rpm	Between 10.6 to 15.8 gm/sec

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  18

Result: 

OK 

See step  10

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11

1. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

2. 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.
3. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
4. Check the DTC judgment result.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

5. Input the DTC: P050A-00.

   Result

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

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 10/2022] 

Result: 

B 

See step  18

1. Check and repair the VVT system.

   HINT: 

   • Refer to DTC P0011-00 Inspection 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; DTC P0021-00: Camshaft Position "A" - Timing Over-Advanced or System Performance Bank 2; DTC P0022-00: Camshaft Position "A" - Timing Over-Retarded Bank 2 [12/2019 - 10/2022]

   • Refer to DTC P0014-00 Inspection 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; DTC P0024-00: Camshaft Position "B" - Timing Over-Advanced or System Performance Bank 2; DTC P0025-00: Camshaft Position "B" - Timing Over-Retarded Bank 2 [12/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  16

1. Replace the air cleaner filter element sub-assembly.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  16

1. Repair or replace the intake system.

   HINT: 

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

   Refer to INITIALIZATION [12/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  16

1. Repair or replace the PCV valve or hose.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  16

1. Clear the DTC.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  17

1. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

2. 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.
3. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
4. Check the DTC judgment result.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

5. Input the DTC: P050A-00.

   Result

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

Result: 

A 

END 

Result: 

B 

See step  18

1. 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 [12/2019 - ]

   HINT: 

   Repair any problems.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  19

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  20

1. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

2. 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.
3. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
4. Check the DTC judgment result.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

5. Input the DTC: P050A-00.

   Result

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

Result: 

A 

END 

Result: 

B 

See step  21

1. Disconnect the mass air flow meter sub-assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C30-3 (VCC) - C54-90 (VC)	Always	Below 1 Ω
   C30-1 (FG) - C54-116 (VG)	Always	Below 1 Ω
   C30-2 (E2G) - C54-115 (E2G)	Always	Below 1 Ω
   C30-3 (VCC) or C54-90 (VC) - Body ground and other terminals	Always	10 kΩ or higher
   C30-1 (FG) or C54-116 (VG) - Body ground and other terminals	Always	10 kΩ or higher
   C30-2 (E2G) or C54-115 (E2G) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  22

Refer to REMOVAL [12/2019 - 10/2022]

HINT: 

• If the results of the inspections performed in step 9 (READ VALUE USING GTS (MASS AIR FLOW SENSOR)) 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 [12/2019 - 10/2022]

Result

Result: 

NEXT 

See step  23

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  24

HINT: 

In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).

1. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

2. 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.
3. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
4. Check the DTC judgment result.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

5. Input the DTC: P050A-00.

   Result

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

Result: 

A 

END 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022]