DTC P050B-00: Cold Start Ignition Timing Performance [12/2019 - 10/2022]: Procedure
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B-00)
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to DTC P050B-00 is output A DTC P050B-00 and other DTCs are output B HINT:
If any DTCs other than P050B-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
- Read the DTCs.
- READ VALUE USING GTS (FUEL TRIM)
HINT:
Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter sub-assembly.
- Start the engine.
- 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 - 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
- INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
- Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also, check that the throttle valve moves smoothly.
OK
Throttle valve is not contaminated with foreign matter and moves smoothly.
Result
Proceed to OK NG
Result:
OK
See step 10
Result:
NG
See step 4
- Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also, check that the throttle valve moves smoothly.
- REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY
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
Proceed to NEXT Result:
NEXT
See step 16
- CHECK PCV SYSTEM
Refer to COMPONENTS [12/2019 - 10/2022]
OK
PCV valve and hose are connected correctly and are not damaged.
Result
Proceed to OK NG Result:
NG
See step 15
Result:
OK
See step 6
- CHECK INTAKE SYSTEM
- 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
- Check the intake system for vacuum leaks.
- CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
- 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
- Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.
- PERFORM ACTIVE TEST USING GTS (CHECK VVT SYSTEM)
- 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 - Perform the Active Test, referring to DTC P0011-00 Procedure (VVT system for intake camshaft).
Result:
NG
See step 12
Result:
OK
See step 9
- Operate the VVT system through the Active Test, and check if the VVT system is operating normally.
- READ VALUE USING GTS (MASS AIR FLOW SENSOR)
- Start the engine.
- Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
Powertrain > Engine > Data List
Tester Display Coolant Temperature - 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 rpmBetween 10.6 to 15.8 gm/sec Result
Proceed to OK NG
Result:
NG
See step 18
Result:
OK
See step 10
- CLEAR DTC
- Clear the DTC.
Powertrain > Engine > Clear DTCs
- Turn the ignition switch off and wait for at least 30 seconds.
Result
Proceed to NEXT
Result:
NEXT
See step 11
- Clear the DTC.
- CHECK WHETHER DTC OUTPUT RECURS (DTC P050B-00) NOTE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - 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.
- Check the DTC judgment result.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050B-00.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(DTC P050B-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
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
- CHECK AND REPAIR VVT SYSTEM
- Check and repair the VVT system.
HINT:
- Refer to DTC P0011-00 Inspection Procedure for intake camshaft.
- Refer to DTC P0014-00 Inspection Procedure for exhaust camshaft.
Result
Proceed to NEXT
Result:
NEXT
See step 16
- Check and repair the VVT system.
- REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
Result:
NEXT
See step 16
- 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 [12/2019 - 10/2022]
Result
Proceed to NEXT
Result:
NEXT
See step 16
- Repair or replace the intake system.
- REPAIR OR REPLACE PCV HOSE
Result:
NEXT
See step 16
- CLEAR DTC
- Clear the DTC.
Powertrain > Engine > Clear DTCs
- Turn the ignition switch off and wait for at least 30 seconds.
Result
Proceed to NEXT
Result:
NEXT
See step 17
- Clear the DTC.
- CHECK WHETHER DTC OUTPUT RECURS (DTC P050B-00) NOTE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - 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.
- Check the DTC judgment result.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050B-00.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(DTC P050B-00 is output)B
Result:
A
END
Result:
B
See step 18
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
- 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 [12/2019 - ]
HINT:
Repair any problems.
Result
Proceed to NEXT
Result:
NEXT
See step 19
- Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.
- CLEAR DTC
- Clear the DTC.
Powertrain > Engine > Clear DTCs
- Turn the ignition switch off and wait for at least 30 seconds.
Result
Proceed to NEXT
Result:
NEXT
See step 20
- Clear the DTC.
- CHECK WHETHER DTC OUTPUT RECURS (DTC P050B-00) NOTE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - 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.
- Check the DTC judgment result.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050B-00.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(DTC P050B-00 is output)B
Result:
A
END
Result:
B
See step 21
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
- 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 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
- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY
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
Proceed to NEXT Result:
NEXT
See step 23
- CLEAR DTC
- Clear the DTC.
Powertrain > Engine > Clear DTCs
- Turn the ignition switch off and wait for at least 30 seconds.
Result
Proceed to NEXT
Result:
NEXT
See step 24
- Clear the DTC.
- 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).
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - 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.
- Check the DTC judgment result.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050B-00.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(DTC P050B-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]
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).