Dtc P014C A/F Sensor Slow Response - Rich To Lean Bank 1 Sensor 1

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P014C, P014D, P015A OR P015B)

INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)

CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

INSPECT AIR FUEL RATIO SENSOR

PERFORM CONFIRMATION DRIVING PATTERN

CHECK WHETHER DTC OUTPUT RECURS (DTC P014C, P014D, P015A OR P015B)

REPLACE AIR FUEL RATIO SENSOR

PERFORM CONFIRMATION DRIVING PATTERN

CHECK WHETHER DTC OUTPUT RECURS (DTC P014C, P014D, P015A OR P015B)

DESCRIPTION

HINT:

1. Refer to DTC P2195 (YARIS_NCP93 RM000000WC40LQX_01.html).
   
2. Sensor 1 refers to the sensor mounted in front of the three-way catalytic converter and located near the engine assembly.
   

1. *: Calculated by ECM based on the air fuel ratio sensor output.
   

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

CONFIRMATION DRIVING PATTERN

HINT:

Performing this confirmation driving pattern will activate the air fuel ratio sensor response monitor.

1. Connect the Techstream to the DLC3.
   
2. Turn the ignition switch to ON.
   
3. Turn the Techstream on.
   
4. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
   
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 / Monitor / Current Monitor.
   
8. Check that O2 Sensor / Current is Incomplete.
   

   HINT:

   The test values for the test items RL RES RATE B1S1, LR RES RATE B1S1, RL DELAY B1S1, and LR DELAY B1S1 do not exist in the Detail of O2 Sensor monitor at this time (the initial value of "0.000" is indicated in each test item).

9. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [A].
   
10. Drive the vehicle at a constant speed between 75 and 100 km/h (47 and 62 mph) for 10 minutes [B].
    

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

11. Check that the O2 Sensor / Current becomes Complete.
    

    HINT:

    Check the test values on the Techstream by entering the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / Details / RL RES RATE B1S1, LR RES RATE B1S1, RL DELAY B1S1, and LR DELAY B1S1.

12. If the monitor item O2 Sensor / Current does not become Complete (if the test values indicated on the Techstream do not change), perform Readiness Monitor Drive Pattern for the air fuel ratio sensor and heated oxygen sensor (YARIS_NCP93 RM000000SXQ06VX.html).
    
13. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
    
14. Read pending DTCs.
    

    HINT:

    1. If a pending DTC is output, the system is malfunctioning.
       
    2. If a pending DTC is not output, perform the following procedure.
       
15. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
    
16. Input the DTC: P014C, P014D, P015A, and P015B.
    
17. Check the DTC judgment result.
    
    

    Techstream Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    If the judgment result shows ABNORMAL, the system has a malfunction.

18. If the DTC judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0T5X.html).
    

    HINT:

    1. If a permanent DTC is output, the system is malfunctioning.
       
    2. If no permanent DTC is output, the system is normal.
       

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

1. A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
   
2. A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
   
3. Sensor 1 refers to the sensor closest to the engine assembly.
   
4. Sensor 2 refers to the sensor farthest away from the engine assembly.
   
5. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
   

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 DTCs.
   

   Result

   Result	Proceed to
   P014C, P014D, P015A or P015B	A
   P014C, P014D, P015A or P015B and other DTCs	B

   HINT:

   If any DTCs other than P014C, P014D, P015A or P015B are output, troubleshoot those DTCs first.

1. Inspect the air fuel ratio sensor (YARIS_NCP93 RM000003VIJ00FX.html).
   

   HINT:

   Perform "Inspection After Repair" after replacing the air fuel ratio sensor (YARIS_NCP93 RM000004NJD006X.html).

1. Disconnect the air fuel ratio sensor 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
   C56-1 (HA1A) - C51-23 (HA1A)	Always	Below 1 Ω
   C56-3 (A1A+) - C51-133 (A1A+)	Always	Below 1 Ω
   C56-4 (A1A-) - C51-134 (A1A-)	Always	Below 1 Ω
   C56-1 (HA1A) or C51-23 (HA1A) - Body ground	Always	10 kΩ or higher
   C56-3 (A1A+) or C51-133 (A1A+) - Body ground	Always	10 kΩ or higher
   C56-4 (A1A-) or C51-134 (A1A-) - Body ground	Always	10 kΩ or higher

1. Check that the proper air fuel ratio sensor is installed to the vehicle.
   

   HINT:

   Perform "Inspection After Repair" after replacing the air fuel ratio sensor (YARIS_NCP93 RM000004NJD006X.html).

1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
   

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 pending DTCs.
   

   Result

   Result	Proceed to
   P014C, P014D, P015A or P015B	A
   No DTCs output (No pending DTCs output)	B

1. Replace the air fuel ratio sensor (YARIS_NCP93 RM000003VIL00HX.html).
   

   HINT:

   Perform "Inspection After Repair" after replacing the air fuel ratio sensor (YARIS_NCP93 RM000004NJD006X.html).

1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
   

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 pending DTCs.
   

   Result

   Result	Proceed to
   No DTCs output (No pending DTCs output)	A
   P014C, P014D, P015A or P015B	B