DTC P050A-00: Cold Start Idle Control System Performance [02/2024 - ]: Procedure
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A-00)
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to P050A-00 and other DTCs are output A P050A-00 is output B HINT:
If any DTCs other than P050A-00 are output, troubleshoot those DTCs first.
Result:
A
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2024 - ]
Result:
B
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.
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
Procedure1
- Read the values displayed on the GTS at engine idle.
Powertrain > Engine > Data List
Tester Display Short FT B1S1 Long FT B1S1 - Add the Short FT B1S1 and Long FT B1S1 values to obtain the total fuel trim.
Result
Result Proceed to The sum of the value of Short FT B1S1 and Long FT B1S1 is -20 % or more, and less than 20 % A None of the above conditions are met B Post-procedure1
- None
Result:
B
See step 5
Result:
A
See step 3
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- INSPECT THROTTLE BODY WITH THROTTLE POSITION SENSOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
- Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with throttle position sensor 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 11
Result:
NG
See step 4
- Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with throttle position sensor assembly. Also, check that the throttle valve moves smoothly.
- REPLACE THROTTLE BODY WITH THROTTLE POSITION SENSOR ASSEMBLY
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 34
- CHECK PCV VALVE AND HOSE CONNECTIONS
- Check the PCV hose connections.
- Check the PCV valve.
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
OK
PCV hose and PCV valve are connected correctly and are not damaged.
Result
Proceed to OK NG
Result:
NG
See step 33
Result:
OK
See step 6
- CHECK INTAKE SYSTEM
- Check the intake system for vacuum leaks.
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
OK
No leaks from intake system.
Result
Proceed to OK NG
Result:
NG
See step 32
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 30
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 (CONTROL THE INTAKE VVT OCV DUTY RATIO BANK 1)
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
Procedure1
- Read the Data List while performing the Active Test with the engine idling.
Powertrain > Engine > Active Test
Active Test Display Control the Intake VVT OCV Duty Ratio Bank 1 Data List Display Intake VVT Change Angle Bank 1 Intake VVT OCV Control Duty Ratio Bank 1 OK
GTS Operation Data List (Intake VVT Change Angle Bank 1) -100% to 100% Varies by 70 DegFR or more Result
Proceed to OK NG Post-procedure1
- None
Result:
NG
See step 22
Result:
OK
See step 9
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- PERFORM ACTIVE TEST USING GTS (CONTROL THE EXHAUST VVT OCV DUTY RATIO BANK 1)
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
Procedure1
- Check the engine speed while operating the cam timing oil control solenoid assembly using the GTS.
Powertrain > Engine > Active Test
Active Test Display Control the Exhaust VVT OCV Duty Ratio Bank 1 Data List Display Exhaust VVT OCV Control Duty Ratio Bank 1 OK
GTS Operation Engine Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT:
Refer to "Data List / Active Test" [Exhaust VVT Hold Learn Value Bank 1, Exhaust VVT Change Angle Bank 1, Exhaust VVT OCV Control Duty Ratio Bank 1 and Exhaust VVT Target Angle Bank 1].
Refer to DATA LIST / ACTIVE TEST [02/2024 - ]
Result
Proceed to OK NG Post-procedure1
- None
Result:
NG
See step 13
Result:
OK
See step 10
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- READ VALUE USING GTS (MASS AIR FLOW SENSOR)
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
- Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher with all the accessories switched off and the shift position in P.
Procedure1
- 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 Result
Result Proceed to The value of Mass Air Flow Sensor is between 5 and 15 gm/sec A None of the above conditions are met B Post-procedure1
- None
Result:
B
See step 36
Result:
A
See step 11
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- CLEAR DTC
Pre-procedure1
- None
Procedure1
- Clear the DTCs.
Powertrain > Engine > Clear DTCs
Result
Proceed to NEXT Post-procedure1
- Turn the ignition switch off and wait for at least 30 seconds.
Result:
NEXT
See step 12
- None
- 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).
Pre-procedure1
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - 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.
Procedure1
- Perform the All Readiness.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050A-00.
- Check the DTC judgment result.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(P050A-00 is output)B Post-procedure1
- None
Result:
A
CHECK FOR INTERMITTENT PROBLEMS
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ]
Result:
B
See step 36
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
- INSPECT CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR EXHAUST CAMSHAFT)
Refer to INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
NG
See step 17
Result:
OK
See step 14
- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
NG
See step 19
Result:
OK
See step 15
- CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
Pre-procedure1
- Remove the cylinder head cover sub-assembly.
*a 10.6° *b 21.91° *c Timing Mark *d "0" Timing Mark *e Groove - - - Turn the crankshaft pulley and align its groove with the "0" timing mark of the timing chain cover.
Procedure1
- Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.
HINT:
If the timing marks are not at the positions shown, turn the crankshaft one revolution clockwise.
OK
Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.
HINT:
If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.
Result
Proceed to OK NG Post-procedure1
- None
Result:
OK
See step 31
Result:
NG
See step 16
- Remove the cylinder head cover sub-assembly.
- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
Result
Proceed to NEXT Result:
NEXT
See step 34
- REPLACE CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR EXHAUST CAMSHAFT)
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 18
- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
OK
See step 20
Result:
NG
See step 19
- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 20
- PERFORM ACTIVE TEST USING GTS (CONTROL THE EXHAUST VVT OCV DUTY RATIO)
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
Procedure1
- Check the engine speed while operating the cam timing oil control solenoid assembly using the GTS.
Powertrain > Engine > Active Test
Active Test Display Control the Exhaust VVT OCV Duty Ratio Bank 1 Data List Display Exhaust VVT OCV Control Duty Ratio Bank 1 OK
GTS Operation Engine Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT:
Refer to "Data List / Active Test" [Exhaust VVT Hold Learn Value Bank 1, Exhaust VVT Change Angle Bank 1, Exhaust VVT OCV Control Duty Ratio Bank 1 and Exhaust VVT Target Angle Bank 1].
Refer to DATA LIST / ACTIVE TEST [02/2024 - ]
Result
Proceed to OK NG Post-procedure1
- None
Result:
OK
See step 34
Result:
NG
See step 21
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 34
- INSPECT CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR INTAKE CAMSHAFT)
Refer to INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
NG
See step 26
Result:
OK
See step 23
- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
NG
See step 28
Result:
OK
See step 24
- CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
Pre-procedure1
- Remove the cylinder head cover sub-assembly.
*a 10.6° *b 21.91° *c Timing Mark *d "0" Timing Mark *e Groove - - - Turn the crankshaft pulley and align its groove with the "0" timing mark of the timing chain cover.
Procedure1
- Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.
HINT:
If the timing marks are not at the positions shown, turn the crankshaft one revolution clockwise.
OK
Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.
HINT:
If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.
Result
Proceed to OK NG Post-procedure1
- None
Result:
OK
See step 31
Result:
NG
See step 25
- Remove the cylinder head cover sub-assembly.
- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
Result
Proceed to NEXT Result:
NEXT
See step 34
- REPLACE CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR INTAKE CAMSHAFT)
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 27
- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
Refer to ON-VEHICLE INSPECTION [02/2024 - ]
Result
Proceed to OK NG Result:
OK
See step 29
Result:
NG
See step 28
- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 29
- PERFORM ACTIVE TEST USING GTS (CONTROL THE INTAKE VVT OCV DUTY RATIO BANK 1)
Pre-procedure1
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - Start the engine.
Procedure1
- Read the Data List while performing the Active Test with the engine idling.
Powertrain > Engine > Active Test
Active Test Display Control the Intake VVT OCV Duty Ratio Bank 1 Data List Display Intake VVT Change Angle Bank 1 Intake VVT OCV Control Duty Ratio Bank 1 OK
GTS Operation Data List (Intake VVT Change Angle Bank 1) -100% to 100% Varies by 70 DegFR or more Result
Proceed to OK NG Post-procedure1
- None
Result:
OK
See step 34
Result:
NG
See step 31
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
Result:
NEXT
See step 34
- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
HINT:
Refer to REMOVAL [02/2024 - ]
Result
Proceed to NEXT Result:
NEXT
See step 34
- 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 [02/2024 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 34
- Repair or replace the intake system.
- REPAIR OR REPLACE PCV VALVE OR HOSE
Result:
NEXT
See step 34
- CLEAR DTC
Pre-procedure1
- None
Procedure1
- Clear the DTCs.
Powertrain > Engine > Clear DTCs
Result
Proceed to NEXT Post-procedure1
- Turn the ignition switch off and wait for at least 30 seconds.
Result:
NEXT
See step 35
- None
- 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).
Pre-procedure1
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - 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.
Procedure1
- Perform the All Readiness.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050A-00.
- Check the DTC judgment result.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(P050A-00 is output)B Post-procedure1
- None
Result:
A
END
Result:
B
See step 36
- 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.
HINT:
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [02/2024 - ]
Repair any problems.
Result
Proceed to NEXT
Result:
NEXT
See step 37
- Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.
- CLEAR DTC
Pre-procedure1
- None
Procedure1
- Clear the DTCs.
Powertrain > Engine > Clear DTCs
Result
Proceed to NEXT Post-procedure1
- Turn the ignition switch off and wait for at least 30 seconds.
Result:
NEXT
See step 38
- None
- 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).
Pre-procedure1
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - 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.
- 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.
Procedure1
- Perform the All Readiness.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050A-00.
- Check the DTC judgment result.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(P050A-00 is output)B Post-procedure1
- None
Result:
A
END
Result:
B
See step 39
- 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)
Pre-procedure1
- Disconnect the mass air flow meter sub-assembly connector.
- Disconnect the ECM connector.
Procedure1
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C52-4 (VCC) - C105-92 (VCVG) Always Below 1 Ω C52-3 (FG) - C105-151 (VG) Always Below 1 Ω C52-2 (E2G) - C105-91 (E2G) Always Below 1 Ω C52-4 (VCC) or C105-92 (VCVG) - Body ground and other terminals Always 10 kΩ or higher C52-3 (FG) or C105-151 (VG) - Body ground and other terminals Always 10 kΩ or higher C52-2 (E2G) or C105-91 (E2G) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 40
- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY
HINT:
- Refer to INSPECTION [02/2024 - ]
- If the result of the inspection performed in step 10 (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.
Result
Proceed to NEXT Result:
NEXT
See step 41
- CLEAR DTC
Pre-procedure1
- None
Procedure1
- Clear the DTCs.
Powertrain > Engine > Clear DTCs
Result
Proceed to NEXT Post-procedure1
- Turn the ignition switch off and wait for at least 30 seconds.
Result:
NEXT
See step 42
- None
- 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).
Pre-procedure1
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
Powertrain > Engine > Data List
Tester Display Coolant Temperature - Put the engine in Inspection Mode (for measuring Exhaust Gas).
Powertrain > Hybrid Control > Utility
Tester Display Inspection Mode - 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.
Procedure1
- Perform the All Readiness.
Powertrain > Engine > Utility
Tester Display All Readiness - Input the DTC: P050A-00.
- Check the DTC judgment result.
Result
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(P050A-00 is output)B Post-procedure1
- None
Result:
A
END
Result:
B
REPLACE ECM
Refer to REMOVAL [02/2024 - ]
- Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).