Part 2
1AR-FE ENGINE CONTROL: SFI SYSTEM: P0136-P0139: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
DTC P0136 - Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
DTC P0137 - Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)
DTC P0138 - Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
DTC P0139 - Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2)
(CONTINUED)
PROCEDURE
1. READ OUTPUT DTC (DTC P0136, P0137, P0138 OR P0139)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result:
D -- READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
C -- READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
B -- CHECK FOR EXHAUST GAS LEAK
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2.
(e) Allow the engine to idle.
(f) Read the heated oxygen sensor output voltage while idling.
Result:
B -- PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME)
A -- Continue to next step.
3. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
(a) Turn the ignition switch off and wait for 5 minutes or more.
(b) Disconnect the heated oxygen sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(d) Reconnect the heated oxygen sensor connector.
NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Short):
Text in Illustration
(c) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
5. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine and warm it up.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume.
(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of the air fuel ratio and heated oxygen sensors displayed on the Techstream.
HINT:
- Change the fuel injection volume within the range of -12% to +12%. The injection volume can be changed in 0.1 or 0.2% graduations within the range.
- The air fuel ratio sensor is displayed as AFS Voltage B1 S1, and the heated oxygen sensor is displayed as O2S B1 S2 on the Techstream.
Result:
HINT: A normal heated oxygen sensor voltage (O2S B1 S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either below or higher than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning.
NG -- REPLACE AIR FUEL RATIO SENSOR
OK -- Continue to next step.
6. INSPECT AIR FUEL RATIO SENSOR
HINT: This air fuel ratio sensor test is to check the air fuel ratio sensor current during fuel-cut. When the sensor is normal, the sensor current indicates below 3.0 mA in this test.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Drive the vehicle according to the drive pattern listed below:
(1) Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or higher.
(2) Drive the vehicle at 37 mph (60 km/h) or more and decelerate the vehicle for 5 seconds or more.
(3) Repeat the step above at least 3 times.
(e) Enter the following menus: Powertrain / Engine / Monitor / O2 Sensor / Details.
(f) Confirm that RANGE B1S1 / Result is either Pass or Fail. If the Techstream shows Fail, recheck RANGE B1S1 / Result after performing the drive pattern.
(g) Select the RANGE B1S1 / Details.
(h) Read the test value.
Standard current:
Below 3.0 mA
HINT: If the Techstream shows Fail again, accelerate the vehicle and use second gear to decelerate the vehicle. Refer to the Confirmation Driving Pattern.
NG -- REPLACE AIR FUEL RATIO SENSOR
OK -- REPLACE HEATED OXYGEN SENSOR
7. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2.
(f) After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes.
(g) Read the output voltage of the heated oxygen sensor when the engine speed is suddenly increased.
HINT: Quickly accelerate the engine to 4000 rpm 3 times using the accelerator pedal.
Standard:
Fluctuates between 0.4 V or less and 0.5 V or higher.
NG -- CHECK FOR EXHAUST GAS LEAK
OK -- Continue to next step.
8. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine and warm it up.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume.
(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of the air fuel ratio and heated oxygen sensors displayed on the Techstream.
HINT:
- Change the fuel injection volume within the range of -12% to +12%. The injection volume can be changed in 0.1 or 0.2% graduations within the range.
- The air fuel ratio sensor is displayed as AFS Voltage B1 S1, and the heated oxygen sensor is displayed as O2S B1 S2 on the Techstream.
Result:
HINT: A normal heated oxygen sensor voltage (O2S B1 S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either below or higher than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning.
NG -- REPLACE AIR FUEL RATIO SENSOR
OK -- CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO
9. CHECK FOR EXHAUST GAS LEAK
(a) Check for exhaust gas leaks.
OK:
No gas leaks.
NG -- REPAIR OR REPLACE EXHAUST GAS LEAK POINT
OK -- Continue to next step.
10. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) P0037
NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)
(a) Disconnect the heated oxygen sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
Text in Illustration
(d) Reconnect the heated oxygen sensor connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
12. REPLACE HEATED OXYGEN SENSOR
(a) Replace the heated oxygen sensor Removal.
NEXT -- Continue to next step.
13. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure) DTC Check / Clear.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON and turn the Techstream on (Step A).
(f) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B).
(g) With the transmission in 4th gear or more, drive the vehicle at 37 to 75 mph (60 to 120 km/h) for 10 minutes or more (Step C).
NEXT -- Continue to next step.
14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
(e) Input DTCs: P0136, P0137 and P0138.
(f) Check the DTC judgment.
Result:
B -- REPLACE AIR FUEL RATIO SENSOR
A -- REPAIR COMPLETED
15. REPLACE AIR FUEL RATIO SENSOR
(a) Replace the air fuel ratio sensor Removal.
NEXT -- Continue to next step.
16. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure) DTC Check / Clear.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON and turn the Techstream on (Step A).
(f) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B).
(g) With the transmission in 4th gear or more, drive the vehicle at 37 to 75 mph (60 to 120 km/h) for 10 minutes or more (Step C).
NEXT -- Continue to next step.
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136 OR P0138)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
(e) Input DTCs: P0136 and P0138.
(f) Check the DTC judgment.
Result:
B -- REPLACE HEATED OXYGEN SENSOR
A -- REPAIR COMPLETED
18. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2.
(e) After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes.
(f) Allow the engine to idle.
(g) Depress the accelerator pedal quickly until the engine speed reaches 2500 rpm 3 times.
Result:
B -- READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN)
A -- Continue to next step.
19. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
(a) Turn the ignition switch off and wait for 5 minutes or more.
(b) Disconnect the heated oxygen sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(d) Reconnect the heated oxygen sensor connector.
NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.
20. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Short):
Text in Illustration
(c) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
21. READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure) DTC Check / Clear.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON and turn the Techstream on (Step A).
(f) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B).
(g) Drive the vehicle at 37 mph (60 km/h), and then decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut (Step C).
(h) Turn the Techstream on.
(i) Enter the following menus: Powertrain / Engine / Utility / All Readiness (Step D).
(j) Input DTCs: P0139.
(k) Check the STATUS is NORMAL. If STATUS is INCOMPLETE, perform the drive pattern adding the vehicle speed and using the second gear to decelerate the vehicle.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS
A -- REPLACE HEATED OXYGEN SENSOR