Dtc P2195 Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1). Corolla Auris

DESCRIPTION

WIRING DIAGRAM

CONFIRMATION DRIVING PATTERN

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P2195 OR P2196)

CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST

READ VALUE USING INTELLIGENT TESTER (TEST VALUE OF AIR FUEL RATIO SENSOR)

READ VALUE USING INTELLIGENT TESTER (OUTPUT VOLTAGE OF AIR FUEL RATIO SENSOR)

REPLACE AIR FUEL RATIO SENSOR

PERFORM CONFIRMATION DRIVING PATTERN

CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196)

INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)

CHECK AIR FUEL RATIO SENSOR (POWER SOURCE)

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

CHECK INTAKE SYSTEM

CHECK FUEL PRESSURE

INSPECT INJECTOR ASSEMBLY

REPLACE AIR FUEL RATIO SENSOR

PERFORM CONFIRMATION DRIVING PATTERN

CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196)

INSPECT FUSE (EFI NO. 2 FUSE)

CHECK FUEL LINE

DESCRIPTION

УКАЗАНИЕ:

1. Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.
   
2. Sensor 1 refers to the sensor mounted in front of the three way catalyst converter and located near the engine assembly.
   

УКАЗАНИЕ:

1. When either of these DTCs is set, check the air fuel ratio sensor output voltage by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / AFS B1 S1.
   
2. Short-term fuel trim values can also be read using the intelligent tester.
   
3. The ECM regulates the voltages at the A1A+ and A1A- terminals of the ECM to a constant level. Therefore, the air fuel ratio sensor output voltage cannot be confirmed without using the intelligent tester.
   
4. If the air fuel ratio sensor is malfunctioning, the ECM sets the DTC P2195 or P2196.
   

WIRING DIAGRAM

CONFIRMATION DRIVING PATTERN

1. This confirmation driving pattern is used in the "PERFORM CONFIRMATION DRIVING PATTERN" procedure of the following diagnostic troubleshooting procedure.
   
   
   
   
   
   
   
   
   
   
   
1. Connect the intelligent tester to the DLC3.
   
2. Turn the ignition switch on (IG).
   
3. Turn the tester on.
   
4. Clear the DTCs (See page Нажмите здесь).
   
5. Start the engine, and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Procedure "A").
   
6. On the intelligent tester, select the following menu items to check the fuel-cut status: Powertrain / Engine and ECT / Data List / All Data / Idle Fuel Cut.
   
7. Drive the vehicle at between 60 km/h (38 mph) and 120 km/h (75 mph) for at least 10 minutes (Procedure "B").
   
8. Change the transmission to the 2nd gear (Procedure "C").
   
9. Drive the vehicle at a proper vehicle speed to perform fuel-cut operation (Procedure "D") (refer to the following HINT).
   

   УКАЗАНИЕ:

   Fuel-cut is performed when the following conditions are met:

   1. Accelerator pedal fully is released.
      
   2. Engine speed is 2500 rpm or more (fuel injection resumes at 1000 rpm).
      
10. Accelerate the vehicle to 64 km/h (40 mph) or more by depressing the accelerator pedal for at least 10 seconds (Procedure "E").
    
11. Soon after performing Procedure "E" above, release the accelerator pedal for at least 4 seconds without depressing the brake pedal in order to execute fuel-cut control (Procedure "F").
    
12. Allow the vehicle to decelerate until the vehicle speed is less than 10 km/h (6 mph).
    
13. Repeat steps from Procedure "C" through Procedure "F" above at least 3 times in one driving cycle.
    

    ПРЕДОСТЕРЕЖЕНИЕ:

    Strictly observe posted speed limits, traffic laws, and road conditions when performing these driving patterns.

INSPECTION PROCEDURE

УКАЗАНИЕ:

Intelligent tester only:

Malfunctioning areas can be identified by performing the "Control the Injection Volume for A/F Sensor" function provided in the Active Test. The "Control the Injection Volume for A/F Sensor" function can help determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

1. Connect the intelligent tester to the DLC3.
   
2. Start the engine.
   
3. Turn the tester on.
   
4. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
   
5. On the tester, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
   
6. Perform the "Control the Injection Volume for A/F Sensor" operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
   
7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS B1 S1 and O2S B1 S2) displayed on the tester.
   

УКАЗАНИЕ:

1. The "Control the Injection Volume for A/F Sensor" operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
   
2. The sensors react in accordance with increases and decreases in the fuel injection volume.
   

Standard:

Tester Display (Sensor)	Injection Volume	Status	Voltage
AFS B1 S1 (A/F)	+25%	Rich	Less than 3.0
	-12.5%	Lean	More than 3.35
O2S B1 S2 (HO2)	+25%	Rich	More than 0.55
	-12.5%	Lean	Less than 0.4

ПРИМЕЧАНИЕ:

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor (sensor 2) output has a maximum output delay of approximately of 20 seconds.

Case	A/F Sensor (Sensor 1) Output Voltage	HO2 Sensor (Sensor 2) Output Voltage	Main Suspected Trouble Area
1			-
2			Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit
3			Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit Exhaust gas leakage
4			Fuel pressure Exhaust gas leakage (Air fuel ratio extremely lean or rich)

1. Following the "Control the Injection Volume for A/F Sensor" procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
   
2. To display the graph, select the following menu items on the tester: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / View / AFS B1 S1 and O2S B1 S2.
   

УКАЗАНИЕ:

1. DTC P2A00 may be set when the air fuel ratio is stuck rich or lean.
   
2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
   
3. 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.
   
4. 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.
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG).
   

3. Turn the tester on.
   

4. Select the following menu items: Powertrain / Engine and ECT / DTC.
   

5. Read the DTCs.
   
   

   Result:

   
   

   Display (DTC Output)	Proceed to
   P2195 or P2196	A
   P2195 or P2196 and other DTCs	B

УКАЗАНИЕ:

If any DTCs relating to the air fuel ratio sensor (DTCs for the air fuel ratio sensor heater or air fuel ratio sensor admittance) are output, troubleshoot those DTCs first.

1. Has the vehicle run out of fuel in the past?
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG).
   

3. Turn the tester on.
   

4. Clear the DTCs (See page Нажмите здесь).
   

5. Drive the vehicle in accordance with the drive pattern described in the CONFIRMATION DRIVING PATTERN.
   

6. Select the following menu items: Powertrain / Engine and ECT / Utility / Monitor Status.
   

7. Check that the status of "O2 Sensor" is "Complete".
   If the status is still "Incomplete", drive the vehicle according to the driving pattern again.
   

   УКАЗАНИЕ:

   1. "Available" indicates that the component has not been monitored yet.
      
   2. "Complete" indicates that the component is functioning normally.
      
   3. "Incomplete" indicates that the component is malfunctioning.
      

8. Select the following menu items: Powertrain / Engine and ECT / Data List / AFS B1 S1.
   

9. Check the test value of the air fuel ratio sensor output current during fuel-cut (Refer to the Monitor Driving Pattern 2 [Detail for Procedure "C" through Procedure "F"] in the CONFIRMATION DRIVING PATTERN).
   

Result:

Test Value	Proceed to
Within normal range (1.0 mA or more, and less than 3.6 mA)	A
Outside normal range (Less than 1.0 mA, or 3.6 mA or more)	B

1. Connect the intelligent tester to the DLC3.
   

2. Start the engine.
   

3. Turn the tester on.
   

4. Warm up the air fuel ratio sensor at an engine speed of 2500 rpm for 90 seconds.
   

5. On the tester, select the following menu items: Powertrain / Engine and ECT / Data List / AFS B1 S1 and Engine Speed / Function / Snap Shot Record.
   

6. Check the air fuel ratio sensor voltage 3 times, when the engine is in each of the following conditions:
   

   1. While idling (for at least 30 seconds) (Step "A").
      

   2. At an engine speed of approximately 2500 rpm (without any sudden changes in engine speed) (Step "B").
      

   3. Raise the engine speed to 4000 rpm and then quickly release the accelerator pedal so that the throttle valve is fully closed (Step "C").
      
      

      Standard voltage:

      
      

      Condition	A/F Sensor Voltage Variation	Reference
      Step "A" and Step "B"	Remains at approximately 3.3 V	Between 3.1 V and 3.5 V
      Step "C"	Increases to 3.8 V or more	This occurs during engine deceleration (when fuel-cut performed)

УКАЗАНИЕ:

1. For more information, see the diagrams below.
   
   
   
   
   
   
2. If the output voltage of the air fuel ratio sensor remains at approximately 3.3 V (see Malfunction Condition diagram) under any conditions, including those above, the air fuel ratio sensor may have an open circuit. (This will also happen if the air fuel ratio sensor heater has an open circuit.)
   
3. If the output voltage of the air fuel ratio sensor remains at either approximately 3.8 V or more, or 2.8 V or less (see Malfunction Condition diagram) under any conditions, including those above, the air fuel ratio sensor may have a short circuit.
   
4. The ECM stops fuel injection (fuel cut) during engine deceleration. This causes a lean condition and results in a momentary increase in the air fuel ratio sensor output voltage.
   
5. The ECM must establish a closed throttle valve position learning value to perform fuel cut. If the battery terminal has been reconnected, the vehicle must be driven over 16 km/h (10 mph) to allow the ECM to learn the closed throttle valve position.
   
6. When the vehicle is driven:
   The output voltage of the air fuel ratio sensor may be below 2.8 V during fuel enrichment. For the vehicle, this translates to a sudden increase in speed with the accelerator pedal fully depressed when trying to overtake another vehicle. The air fuel ratio sensor is functioning normally.
   
7. The air fuel ratio sensor is a current output element; therefore, the current is converted into a voltage inside the ECM. Measuring the voltage at the connectors of the air fuel ratio sensor or ECM will show a constant voltage result.
   

1. Replace the air fuel ratio sensor (See page Нажмите здесь).
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG).
   

3. Turn the tester on.
   

4. Select the following menu items: Powertrain / Engine and ECT / DTC.
   

5. Read the pending DTCs.
   
   

   Result:

   
   

   Display (DTC Output)	Proceed to
   No output	A
   P2195 or P2196	B

1. Disconnect the air fuel ratio sensor connector.
   

2. Measure the resistance according to the value(s) in the table below.
   

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   B89-1 (HA1A) - B89-2 (+B)	20°C (68°F)	1.8 to 3.4 Ω
   B89-1 (HA1A) - B89-4 (A1A-)	Always	10 kΩ or higher

3. Reconnect the air fuel ratio sensor.
   

1. Disconnect the air fuel ratio sensor connector.
   

2. Turn the ignition switch on (IG).
   

3. Measure the voltage according to the value(s) in the table below.
   

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   B89-2 (+B) - Body ground	Ignition switch on (IG)	9 to 14 V

4. Reconnect the air fuel ratio sensor connector.
   

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 (Check for open):

   Tester Connection	Condition	Specified Condition
   B89-1 (HA1A) - B31-109 (HA1A)	Always	Below 1 Ω
   B89-3 (A1A+) - B31-112 (A1A+)	Always	Below 1 Ω
   B89-4 (A1A-) - B31-113 (A1A-)	Always	Below 1 Ω

   Standard resistance (Check for short):

   Tester Connection	Condition	Specified Condition
   B89-1 (HA1A) or B31-109 (HA1A) - Body ground	Always	10 kΩ or higher
   B89-3 (A1A+) or B31-112 (A1A+) - Body ground	Always	10 kΩ or higher
   B89-4 (A1A-) or B31-113 (A1A-) - Body ground	Always	10 kΩ or higher

4. Reconnect the ECM connector.
   

5. Reconnect the air fuel ratio sensor connector.
   

   
   
   
   

1. Check the intake system from vacuum leakage (See page Нажмите здесь).
   

   OK:

   No leakage from intake system.
   

1. Check the fuel pressure (See page Нажмите здесь).
   

1. Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor) (See page Нажмите здесь).
   

1. Replace the air fuel ratio sensor (See page Нажмите здесь).
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG).
   

3. Turn the tester on.
   

4. Select the following menu items: Powertrain / Engine and ECT / DTC.
   

5. Read the DTCs.
   
   

   Result:

   
   

   Display (DTC Output)	Proceed to
   No output	A
   P2195 or P2196	B

1. Remove the EFI No. 2 fuse from the integration relay block.
   

2. Measure the resistance according to the value(s) in the table below.
   

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   EFI No. 2 fuse	Always	Below 1 Ω

3. Reconnect the EFI No. 2 fuse.
   

1. Check the fuel lines for leaks or blockage (See page Нажмите здесь).