Part 2
2GR-FXE ENGINE CONTROL: SFI SYSTEM: P0136-P0139,P0156-P0159: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
6. CHECK AIR FUEL RATIO SENSOR
HINT
This air fuel ratio sensor test is to check the air fuel ratio sensor current during the fuel-cut. When the sensor is normal, the sensor current will indicate below 3.0 mA in this test.
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Drive the vehicle by the drive pattern as listed below:
(1) Put the engine in inspection mode Component Tests and General Diagnostics.
(2) Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or more.
(3) Drive the vehicle at 37 mph (60 km/h) or more with the shift lever in S, select the S2 range, and decelerate the vehicle for 5 seconds or more.
(4) Repeat the deceleration above at least 3 times.
(e) Enter the following menus: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details.
(f) Confirm that RANGE B1S1and RANGE B2S1 are either Pass or Fail. If the Techstream shows Incomplete, re-check RANGE B1S1 and RANGE B2S1 after performing the drive pattern.
(g) Select the RANGE B1S1 and RANGE B2S1.
(h) Read the Test Value.
Standard Current:
Less than 3.0 mA
HINT
If the Techstream shown Incomplete again, add the vehicle speed and use the S2 range to decelerate the vehicle.
NG -- REPLACE AIR FUEL RATIO SENSOR
OK -- REPLACE HEATED OXYGEN SENSOR
7. READ VALUE USING TECHSTREAM (O2S B1S2 OR O2S B2S2)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Warm up the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test/ Control the Injection Volume.
(g) Change the fuel injection volume using the Techstream, and monitoring the voltage output of heated oxygen sensor displayed on the Techstream.
HINT
- Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range.
- The heated oxygen sensor is displayed as O2S B1S2 or O2S B2S2 on the Techstream.
- The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
Standard:
Fluctuates between 0.4 V or less and 0.55 V or more.
NG -- INSPECT 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) Start the engine.
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Warm up the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume.
(g) Change the fuel injection volume using the Techstream, and monitoring the voltage output of air fuel ratio and heated oxygen sensors displayed on the Techstream.
HINT
- Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range.
- The air fuel ratio sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the heated oxygen sensor is displayed as O2S B1S2 or O2S B2S2, on the Techstream.
- The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
Result:
HINT
A normal heated oxygen sensor voltage (O2S B1S2 or O2S B2S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more 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 AND REPLACE EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (INJECTOR, FUEL PRESSURE, GAS LEAK, EGR VALVE, ETC.)
9. INSPECT FOR EXHAUST GAS LEAK
(a) Inspect for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes.
OK:
No gas leaks.
NG -- REPAIR OR REPLACE EXHAUST GAS LEAK POINT
OK -- Continue to next step.
10. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)
(a) Disconnect the heated oxygen sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Reconnect the heated oxygen sensor connector.
NG -- REPLACE HEATED OXYGEN SENSOR Removal
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 (HEATED OXYGEN SENSOR - ECM)
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 power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off and wait for 30 seconds.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137, P0138, P0156, P0157 and P0158.
NEXT -- Continue to next step.
14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158)
(a) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(b) Input DTC: P0136, P0137, P0138, P0156, P0157 or P0158.
(c) Check that the DTC monitor is NORMAL. If DTC monitor is INCOMPLETE, perform the driving pattern adding the vehicle speed.
Result:
B -- END
A -- Continue to next step.
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 power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off and wait for 30 seconds.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137, P0138, P0156, P0157 and P0158.
NEXT -- Continue to next step.
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158)
(a) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(b) Input DTC: P0136, P0137, P0138, P0156, P0157 or P0158.
(c) Check the DTC monitor is NORMAL. If DTC monitor is INCOMPLETE, perform the driving pattern adding the vehicle speed.
Result:
B -- END
A -- Continue to next step.
18. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.
HINT
The A/C switch and all accessory switches should be off.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
(g) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.
HINT
- Do not leave the EGR valve open for 10 seconds or more during the Active Test.
- Be sure to return the EGR valve to step 0 when Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
HINT
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve.
Result:
B -- REPLACE ECM Removal
A -- Continue to next step.
19. INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly Removal.
(b) Check if the EGR valve assembly is stuck open.
OK:
EGR valve is tightly closed.
(c) Reinstall the EGR valve assembly Installation.
NG -- REPLACE EGR VALVE ASSEMBLY Removal
OK -- REPLACE ECM Removal
20. REPLACE AIR FUEL RATIO SENSOR
(a) Replace the air fuel ratio sensor Removal.
NEXT -- Continue to next step.
21. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off and wait for 30 seconds.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137, P0138, P0156, P0157 and P0158.
NEXT -- Continue to next step.
22. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0138, P0156 OR P0158)
(a) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(b) Input the DTC: P0136, P0138, P0156 or P0158.
(c) Check the DTC judgment result.
Result:
B -- END
A -- Continue to next step.
23. REPLACE HEATED OXYGEN SENSOR
(a) Replace the heated oxygen sensor Removal.
NEXT -- Continue to next step.
24. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off and wait for 30 seconds.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137, P0138, P0156, P0157 and P0158.
NEXT -- Continue to next step.
25. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0138, P0156 OR P0158)
(a) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(b) Input the DTC: P0136, P0138, P0156 or P0158.
(c) Check the DTC judgment result.
Result:
B -- END
A -- Continue to next step.
26. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.
HINT
The A/C switch and all accessory switches should be off.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
(g) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.
HINT
- Do not leave the EGR valve open for 10 seconds or more during the Active Test.
- Be sure to return the EGR valve to step 0 when Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
HINT
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve.
Result:
B -- REPLACE ECM Removal
A -- Continue to next step.
27. INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly Removal.
(b) Check if the EGR valve assembly is stuck open.
OK:
EGR valve is tightly closed.
(c) Reinstall the EGR valve assembly Installation.
NG -- REPLACE EGR VALVE ASSEMBLY Removal
OK -- REPLACE ECM Removal
28. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Allow the engine to idle.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List / A/F Control System / O2S B1S2 or O2S B2S2.
(g) Read the heated oxygen sensor output voltage while idling.
Result:
B -- READ DTC OUTPUT (DTC P0139 OR P0159 IS OUTPUT AGAIN)
A -- Continue to next step.
29. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
(a) Disconnect the heated oxygen sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Reconnect the heated oxygen sensor connector.
NG -- REPLACE HEATED OXYGEN SENSOR Removal
OK -- Continue to next step.
30. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
(a) Turn the power switch off and wait for 5 minutes.
(b) Disconnect the ECM connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Short):
Text in Illustration
(d) Reconnect the ECM connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM)
OK -- REPLACE ECM Removal
31. READ DTC OUTPUT (DTC P0139 OR P0159 IS OUTPUT AGAIN)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs DTC Check / Clear.
(d) Turn the power switch off and wait for 30 seconds.
(e) Turn the power switch on (IG) and turn the Techstream on [A].
(f) Put the engine in inspection mode Component Tests and General Diagnostics.
(g) Start the engine.
(h) Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or more [B].
(i) Drive the vehicle at 37 mph (60 km/h) with the shift lever in S, select S2 range, and decelerate the vehicle for 6 seconds or more [C].
(j) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness [D].
(k) Input the DTC: P0139 or P0159.
(l) Check the DTC monitor is NORMAL. If DTC monitor is INCOMPLETE, perform the driving pattern adding the vehicle speed and using the S2 range to decelerate the vehicle.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- REPLACE HEATED OXYGEN SENSOR Removal