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Home >> Toyota >> 2016 >> Highlander LE Plus, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 40 (SFI System [1AR-FE] - Diagnostic Codes - (Except Hybrid) (8 Of 8)) >> SFI System >> DTC P050B: Cold Start Ignition Timing Performance [08/2014 - 11/2016] >> Procedure

DTC P050B: Cold Start Ignition Timing Performance [08/2014 - 11/2016]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B) 
    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 and ECT / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

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

      HINT: 

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

    Result: 

    B 

    Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2014 - 11/2015]  or  DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 11/2016] 

    Result: 

    A 

    See step  2

  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.

    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas AF Control / Short FT #1 and Long FT #1.

      Powertrain > Engine > Data List 

      Tester Display
      Short FT #1
      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

      The total of the Short FT #1 and Long FT #1 values is between -20% and 20%.

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE) 
    1. Inspect 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: 

    OK 

    See step  10

    Result: 

    NG 

    See step  4

  4. REPAIR OR REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY 

    Refer to REMOVAL [12/2013 - ]

    HINT: 

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

    Refer to INITIALIZATION [12/2013 - ]

    NEXT 

    See step  15

  5. CHECK PCV SYSTEM 
    1. Check the PCV hose connections.

      Refer to COMPONENTS [12/2013 - ]

      OK

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

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  6

  6. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leaks.

      Refer to ON-VEHICLE INSPECTION [12/2013 - ]

      OK

      No leaks from intake system.

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  7

  7. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 
    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: 

    NG 

    See step  12

    Result: 

    OK 

    See step  8

  8. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINER) 
    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 Procedure (VVT system for intake camshaft).

        See step  2

      2. Perform the Active Test, referring to DTC P0014 Procedure (VVT system for exhaust camshaft).

        Refer to PROCEDURE - Step 2

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  9

  9. READ VALUE USING TECHSTREAM (MAF) 

    Refer to PROCEDURE - Step 6

    Result: 

    NG 

    See step  16

    Result: 

    OK 

    See step  10

  10. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B) 
    NOTE:

    In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

    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 [12/2013 - 11/2016]

      Powertrain > Engine > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON and turn the Techstream on.
    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temp
    8. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
    9. 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.
    10. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine > Utility 

      Tester Display
      All Readiness
    12. Input the DTC: P050B.
    13. Check the DTC judgment result.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      NORMAL
      (DTCs are not output)      		 A
      ABNORMAL
      (DTC P050B is output)      		 B

    Result: 

    A 

    Refer to  CHECK FOR INTERMITTENT PROBLEMS [12/2013 - ] 

    Result: 

    B 

    See step  16

  11. CHECK AND REPAIR VVT SYSTEM 

    NEXT 

    See step  15

  12. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 
    1. Replace the air cleaner filter element sub-assembly.

    NEXT 

    See step  15

  13. REPAIR OR REPLACE INTAKE SYSTEM 

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

    Refer to INITIALIZATION [12/2013 - ]

    NEXT 

    See step  15

  14. REPAIR OR REPLACE PCV HOSE 
    1. Repair or replace the PCV valve or hose.

    NEXT 

    See step  15

  15. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B) 
    NOTE:

    In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

    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 [12/2013 - 11/2016]

      Powertrain > Engine > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON and turn the Techstream on.
    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temp
    8. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
    9. 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.
    10. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine > Utility 

      Tester Display
      All Readiness
    12. Input the DTC: P050B.
    13. Check the DTC judgment result.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      NORMAL
      (DTCs are not output)      		 A
      ABNORMAL
      (DTC P050B is output)      		 B

    Result: 

    A 

    END 

    Result: 

    B 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) 
    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 [12/2013 - ]

      HINT: 

      Repair any problems.

    NEXT 

    See step  17

  17. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B) 
    NOTE:

    In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

    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 [12/2013 - 11/2016]

      Powertrain > Engine > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON and turn the Techstream on.
    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temp
    8. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
    9. 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.
    10. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine > Utility 

      Tester Display
      All Readiness
    12. Input the DTC: P050B.
    13. Check the DTC judgment result.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      ABNORMAL
      (DTC P050B is output)      		 A
      NORMAL
      (DTCs are not output)      		 B

    Result: 

    B 

    END 

    Result: 

    A 

    See step  18

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

    Refer to PROCEDURE - Step 3

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  19

  19. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY 

    Refer to REMOVAL [12/2013 - ]

    HINT: 

    • If the result of the inspection performed in step 9 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 [12/2013 - ]

    NEXT 

    See step  20

  20. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B) 
    NOTE:

    In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data).

    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 [12/2013 - 11/2016]

      Powertrain > Engine > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON and turn the Techstream on.
    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temp
    8. Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
    9. 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.
    10. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine > Utility 

      Tester Display
      All Readiness
    12. Input the DTC: P050B.
    13. Check the DTC judgment result.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      NORMAL
      (DTCs are not output)      		 A
      ABNORMAL
      (DTC P050B is output)      		 B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE ECM. Refer to  REMOVAL [12/2013 - ] 

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