Engine Control System (Diagnostic Codes (P0365 - U0101) & Circuit Tests): Other Lexus GS III facelift

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All

Camshaft Position Sensor Range Check (Chattering, Low voltage, High voltage) P0365, P0367, P0368, P0390, P0392 and P0393

Camshaft Position Sensor Range Check / Rationality P0365 and P0390

TYPICAL MALFUNCTION THRESHOLDS

Camshaft Position Sensor Range Check (Chattering) P0365 and P0390

Camshaft Position Sensor Range Check (Low voltage) P0367 and P0392

Camshaft Position Sensor Range Check (High voltage) P0368 and P0393

Camshaft Position Sensor Range Check / Rationality P0365, P0390

COMPONENT OPERATING RANGE

MONITOR RESULT

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

CONFIRMATION DRIVING PATTERN

HINT

Performing this confirmation pattern will activate the catalyst monitor. This is very useful for verifying the completion of a repair.

Scheme 142

1. (a) Connect the Techstream to the DLC3.
2. (b) Turn the engine switch on (IG).
3. (c) Turn the Techstream on.
4. (d) Clear DTCs (if set) Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) .
5. (e) Select the following menu items: Powertrain / Engine and ECT / Monitor / Catalyst Efficiency / Status 2.
6. (f) Check that Catalyst Efficiency is Incomplete.
7. (g) Start the engine and warm it up.
8. (h) Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10 minutes.
9. (i) Note the state of the Monitor items. Those items will change to Complete as Catalyst Efficiency monitor operates.
10. (j) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending; then check if any DTCs (any pending DTCs) are set.

HINT

If Catalyst Efficiency does not change to Complete, and any pending DTCs fail to set, extend the driving time.

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0420 AND/OR P0430) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P0420 and/or P0430 A P0420 and/or P0430 and other DTCs B HINT: If any DTCs other than P0420 or P0430 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (A/F CONTROL) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage 0B1 S1 and O2S B1 S2 or AFS Voltage B2 S1 and O2S B2 S2) displayed on the Techstream. HINT: 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%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard Tester Display (Sensor) Injection Volume Status Voltage AFS Voltage B1 S1 or AFS Voltage B2 S1 (A/F) +25% Rich Less than 3.1 AFS Voltage B1 S1 or AFS Voltage B2 S1 (A/F) -12.5% Lean More than 3.4 O2S B1 S2 or O2S B2 S2 (HO2) +25% Rich More than 0.55 O2S B1 S2 or O2S B2 S2 (HO2) -12.5% Lean Less than 0.4 Result Status AFS Voltage B1 S1 or AFS Voltage B2 S1 Status O2S B1 S2 or O2S B2 S2 A/F Condition and A/F and HO2 Sensor Condition Misfire Main Suspected Trouble Area Proceed to Lean/Rich Lean/Rich Normal - Three-Way Catalytic Converter (TWC) Gas leakage from exhaust system A Lean Lean/Rich A/F sensor malfunction - A/F sensor B Rich Lean/Rich A/F sensor malfunction - A/F sensor Lean/Rich Lean HO2 sensor malfunction - HO2 sensor Gas leakage from exhaust system C Lean/Rich Rich HO2 sensor malfunction - HO2 sensor Gas leakage from exhaust system Lean Lean Actual air-fuel ratio lean May occur Extremely rich or lean actual air-fuel ratio Gas leakage from exhaust system A Rich Rich Actual air-fuel ratio rich - Extremely rich or lean actual air-fuel ratio Gas leakage from exhaust system Lean: During Control the Injection Volume for A/F Sensor, the A/F sensor output voltage (AFS) is consistently more than 3.4 V, and the HO2 sensor output voltage (O2S) is consistently less than 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS is consistently less than 3.1 V, and the O2S is consistently more than 0.55 V. Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the HO2 sensor alternates correctly. C --> CHECK AND REPLACE HEATED OXYGEN SENSOR, AND CHECK AND REPAIR EXHAUST GAS LEAKAGE B --> CHECK AND REPLACE AIR FUEL RATIO SENSOR A: Go to next step
3. CHECK FOR EXHAUST GAS LEAK OK No gas leakage. NG --> REPAIR OR REPLACE EXHAUST GAS LEAKAGE POINT OK: Go to next step
4. CHECK DTC OUTPUT (DTC P0420 AND/OR P0430) According to the DTCs output in the Check Any Other DTCs Output step, proceed to the next step according to the table below. Result Display (DTC output) Proceed to P0420 A, C P0430 B, C P0420 and P0430 A, B, C B --> See step 7 A --> See step 5 C --> See step 6
5. REPLACE EXHAUST MANIFOLD SUB-ASSEMBLY RH (TWC: FRONT CATALYST). Refer to «REMOVAL - Step 85»(ref-382704-S06161003072011012800000)
6. REPLACE FRONT EXHAUST PIPE ASSEMBLY (TWC: REAR CATALYST)Refer to «COMPONENTS»(ref-382730-S09997881002011012800000)
7. REPLACE EXHAUST MANIFOLD SUB-ASSEMBLY LH (TWC: FRONT CATALYST). Refer to «REMOVAL - Step 84»(ref-382704-S06161003072011012800000)

1. Key-off monitor sequence 1 to 8 1. Atmospheric pressure measurement Next sequence is run if following condition is met: - Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) for 1 second 2. First reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2 and 3 1. EVAP pressure just after reference pressure measurement started -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 3. EVAP canister vent valve stuck close stuck check Next sequence is run if following condition is met: - EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more 4. Vacuum introduction Next sequence is run if following condition is met: - EVAP pressure Saturated within 15 minutes 5. EVAP canister purge valve close stuck check Next sequence is run if following condition is met: - EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more 6. Second reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2, 3 and 4 1. EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 4. Difference between first reference pressure and second reference pressure Less than 0.7 kPa (5.25 mmHg) 7. Leak check Next sequence is run if following condition is met: - EVAP pressure when vacuum introduction complete Second reference pressure or less 8. Atmospheric pressure measurement EVAP monitor is complete if following condition is met: - Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa (2.25 mmHg)

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

Key-off monitor

1. Key-off monitor sequence 1 to 8 1. Atmospheric pressure measurement Next sequence is run if following condition is met: - Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) for 1 second 2. First reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2 and 3 1. EVAP pressure just after reference pressure measurement started -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 3. EVAP canister vent valve stuck close stuck check Next sequence is run if following condition is met: - EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more 4. Vacuum introduction Next sequence is run if following condition is met: - EVAP pressure Saturated within 15 minutes 5. EVAP canister purge valve close stuck check Next sequence is run if following condition is met: - EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more 6. Second reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2, 3 and 4 1. EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 4. Difference between first reference pressure and second reference pressure Less than 0.7 kPa (5.25 mmHg) 7. Leak check Next sequence is run if following condition is met: - EVAP pressure when vacuum introduction complete Second reference pressure or less 8. Atmospheric pressure measurement EVAP monitor is complete if following condition is met - Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa (2.25 mmHg) Purge flow monitor Monitor runs whenever following DTCs not present None Engine Running ECT 4.4°C (40°F) or more IAT 4.4°C (40°F) or more EVAP pressure sensor Not detected EVAP canister purge valve Not operated by scan tool EVP system check Not operated by scan tool Battery voltage 10 V or more Purge duty cycle 8 % or more

Purge VSV stuck open

Purge VSV stuck closed

Purge flow

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

P0451 (Noise Monitor)

P0451 (Stuck Monitor)

P0450, P0452 and P0453

1. P0450: Canister pressure sensor chattering

2. P0451: Canister pressure sensor noise

3. P0451: Canister pressure sensor stuck

4. P0452: Canister pressure sensor low voltage

5. P0453: Canister pressure sensor high voltage

Scheme 143

1. Key-off monitor sequence 1 to 8 1. Atmospheric pressure measurement Next sequence is run if following condition is met: - Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) for 1 second 2. First reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2 and 3 1. EVAP pressure just after reference pressure measurement started -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 3. EVAP canister vent valve stuck close stuck check Next sequence is run if following condition is met: - EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more 4. Vacuum introduction Next sequence is run if following condition is met: - EVAP pressure Saturated within 15 minutes 5. EVAP canister purge valve close stuck check Next sequence is run if following condition is met: - EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more 6. Second reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2, 3 and 4 1. EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 4. Difference between first reference pressure and second reference pressure Less than 0.7 kPa (5.25 mmHg) 7. Leak check Next sequence is run if following condition is met: - EVAP pressure when vacuum introduction complete Second reference pressure or less 8. Atmospheric pressure measurement EVAP monitor is complete if following condition is met - Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa (2.25 mmHg)

P0455: EVAP gross leak

P0456: EVAP small leak

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

Functional check

Functional check

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC output) Proceed to P0505 A P0505 and other DTCs B HINT: If any DTCs other than P0505 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. CHECK VENTILATION HOSE (HOSE CONNECTIONS) OK Ventilation hose is connected correctly and is not damaged. NG --> REPAIR OR REPLACE VENTILATION HOSE OK: Go to next step
3. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
4. CHECK THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> REPLACE THROTTLE BODY OK --> REPLACE ECM

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following the menu items: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P050A A P050A and other DTCs B HINT: If any DTCs other than P050A are output, troubleshoot those DTCs first. B --> See step 16 A: Go to next step
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. Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / A/F Control System / Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2. Read the values displayed on the Techstream while the engine is idling. Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the total Fuel Trim. OK Total of Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values is between -20% and 20%. Result Result Proceed to NG A OK B B --> See step 12 A: Go to next step
3. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 8 OK: Go to next step
4. CHECK PCV HOSE CONNECTIONS OK PCV hose is connected correctly and is not damaged. NG --> See step 9 OK: Go to next step
5. CHECK INTAKE SYSTEM Check the intake system for vacuum leakage. OK No leakage from intake system. NG --> See step 10 OK: Go to next step
6. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element is not excessively contaminated with dirt or oil. OK Air cleaner filter element is not excessively contaminated with dirt or oil. NG --> See step 11 OK: Go to next step
7. REPLACE MASS AIR FLOW METER Replace the mass air flow meter Refer to «REMOVAL»(ref-382728-S38821594132011012800000) . NEXT --> See step 15
8. CHECK AND REPAIR VVT SYSTEM NEXT --> See step 15
9. REPAIR OR REPLACE PCV HOSE NEXT --> See step 15
10. REPAIR OR REPLACE INTAKE SYSTEM NEXT --> See step 15
11. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY NEXT --> See step 15
12. CHECK THROTTLE VALVE Check for deposits around the throttle valve and throttle valve condition. OK No deposits around throttle valve and throttle valve moves smoothly. NG --> See step 14 OK: Go to next step
13. REPLACE ECM Replace the ECM Refer to «REMOVAL»(ref-382728-S20466676072011012800000) . NEXT --> See step 15
14. REPAIR OR REPLACE THROTTLE W/MOTOR BODY ASSY NEXT --> See step 15
15. CHECK WHETHER DTC OUTPUT RECURS (DTC P050A) NOTE: In this operation, the engine must be cold (the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Switch the ECM from normal mode to check mode using the Techstream Refer to «CHECK MODE PROCEDURE»(ref-382723-S26645782532011012800000) . Start the engine to idle for a minute. OK Stable fast idling. Read the DTCs. OK No DTC output. NEXT --> END
16. GO TO DTC CHARTRefer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382723-S22399221492011012800000)

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following the menu items: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P050B A P050B and other DTCs B HINT: If any DTCs other than P050B are output, troubleshoot those DTCs first. B --> See step 16 A: Go to next step
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. Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2. Read the values displayed on the Techstream while the engine is idling. Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the total Fuel Trim. OK Total of Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values is between -20% and 20%. Result Result Proceed to NG A OK B B --> See step 12 A: Go to next step
3. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 8 OK: Go to next step
4. CHECK PCV HOSE CONNECTIONS OK PCV hose is connected correctly and is not damaged. NG --> See step 9 OK: Go to next step
5. CHECK INTAKE SYSTEM Check the intake system for vacuum leakage. OK No leakage from intake system. NG --> See step 10 OK: Go to next step
6. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element is not excessively contaminated with dirt or oil. OK Air cleaner filter element is not excessively contaminated with dirt or oil. NG --> See step 11 OK: Go to next step
7. REPLACE MASS AIR FLOW METER Replace the mass air flow meter Refer to «REMOVAL»(ref-382728-S38821594132011012800000) . NEXT --> See step 15
8. CHECK AND REPAIR VVT SENSOR NEXT --> See step 15
9. REPAIR OR REPLACE PCV HOSE NEXT --> See step 15
10. REPAIR OR REPLACE INTAKE SYSTEM NEXT --> See step 15
11. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY NEXT --> See step 15
12. CHECK THROTTLE VALVE Check for deposits around the throttle valve and throttle valve condition. OK No deposits around throttle valve and throttle valve moves smoothly. NG --> See step 14 OK: Go to next step
13. REPLACE ECM Replace the ECM Refer to «REMOVAL»(ref-382728-S20466676072011012800000) . NEXT --> See step 15
14. REPAIR OR REPLACE THROTTLE W/MOTOR BODY ASSY NEXT: Go to next step
15. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B) NOTE: In this operation, the engine must be cold (the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Switch the ECM from normal mode to check mode using the Techstream Refer to «CHECK MODE PROCEDURE»(ref-382723-S26645782532011012800000) . Start the engine to idle for a minute. OK Stable fast idling. Read the DTCs. OK No DTC outputs. NEXT --> END
16. GO TO DTC CHARTRefer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382723-S22399221492011012800000)

Scheme 144

1. CHECK DTC Clear DTC Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Turn the engine switch off. Disconnect the battery negative terminal and wait for 1 minutes. Connect the battery negative terminal. Turn the engine switch off. Check DTC. OK P0604 is not present. NG --> REPLACE ECM OK --> CHECK FOR INTERMITTENT PROBLEMS

Scheme 145

1. INSPECT ANY OTHER DTCS OUTPUT Connect the Techstream to the DLC3. Turn the engine switch ON (IG). Turn the tester on. Enter the following menus: Power train / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output A DTC P0606 is output B B --> See step 3 A: Go to next step
2. INSPECT DTC (P0136, P0137, P0138, P0156, P0157 OR P0158) Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart. HINT: If 0136 or P0156 is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If 0137 or P0157 is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If 0138 or 0158 is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If DTC P0606 and P0136, P0137, P0138, P0156, P0157, P0158 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more). NEXT --> See step 6
3. CHECK FOR EXHAUST GAS LEAK Allow the engine to idle and rev the engine. Check for exhaust gas leaks around the heated oxygen sensor. If any exhaust gas leaks are present, repair it and proceed to step 4. If no exhaust gas leaks present proceed to step 4. If no exhaust gas leaks are present, a malfunction in the heated oxygen sensor circuit is suspected. If any exhaust gas leaks are present around the heated oxygen sensor, noise appears in the output voltage of the heated oxygen sensor. NEXT: Go to next step
4. PERFORM CONFIRMATION DRIVING PATTERN Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Connect the Techstream to the DLC3. Warm up the engine until the engine coolant temperature becomes 75°(167°F) or more. Perform the driving pattern. Accelerate the vehicle to 50 mph (80 km/h) and stop the vehicle. Drive the vehicle between 38 to 50 mph (60 to 80 km/h) for 5 minutes. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output A DTC P0606 is output B DTC is not output C C --> See step 6 B --> REPLACE ECM A: Go to next step
5. INSPECT DTC (P0136, P0137, P0138, P0156, P0157 OR P0158) Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart. HINT: If 0136 or P0156is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If 0137or P0157 is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If 0138 or 0158 is output, troubleshoot for that DTC first Refer to «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); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)»(ref-382726-S10770902012011012800000) . Then proceed to step 6. If DTC P0606 and P0136, P0137, P0138, P0156, P0157, P0158 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more). NEXT: Go to next step
6. INSPECT ECM Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Stop the engine and wait for 30 minutes. Connect the Techstream to the DLC3. Start engine and allow it to idle for 2 minutes. Turn the tester on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0606 is output A DTC is not output B A --> REPLACE ECM B --> END

1. CHECK DTC Clear DTC Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Turn the engine switch off. Disconnect the battery negative terminal and wait for 1 minute. Connect the battery negative terminal. Turn the engine switch on (IG). Check DTC. OK P0607 is not present. NG --> REPLACE ECM OK --> CHECK FOR INTERMITTENT PROBLEMS

Scheme 146

1. READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P0630 A P0630 and other DTCs B If any DTCs other than P0630 are output, troubleshoot those DTCs first. NOTE: If P0630 is set, the VIN must be input to the ECM using the Techstream. However, all DTCs are cleared automatically by the Techstream when inputting the VIN. If DTCs other than P0630 are set, check them first. B --> GO TO DTC CHART A: Go to next step
2. INPUT VIN WITH TECHSTREAM Refer to REGISTRATION Refer to «REGISTRATION»(ref-382723-S20451870252011012800000) . NEXT --> END

1. CHECK DTC Clear DTC Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Turn the engine switch off. Disconnect the battery negative terminal and wait for 1 minute. Connect the battery terminal. Turn the engine switch on (IG) for 10 seconds. Turn the engine switch off. Turn the engine switch on (IG). Check DTC. OK P0657 is not present. NG --> REPLACE ECM OK --> CHECK FOR INTERMITTENT PROBLEMS

The stop light switch remains on during GO and STOP 5 times.

GO and STOP are defined as follows

1. READ VALUE USING TECHSTREAM (STOP LIGHT SW) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / Stop Light Switch. Read the values displayed on the Techstream. OK Item Measurement Item: Range (display) Normal Condition STOP LIGHT SW Stop light switch status: ON or OFF ON: Brake pedal is depressed OFF: Brake pedal is released OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
2. INSPECT STOP LIGHT SWITCH See step 2 NG --> REPLACE STOP LIGHT SWITCH OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE ECMRefer to «REMOVAL»(ref-382728-S20466676072011012800000)

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1276, P1277,P1278,P1279, P127A OR P127B) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC output) Proceed to P1276, P1277, P1278, P1279, P127A or P127B A P1276, P1277, P1278, P1279, P127A or P127B and other DTCs B B --> GO TO DTC CHART A: Go to next step
2. CHECK HARNESS AND CONNECTOR (TERMINAL VOLTAGE) Disconnect the fuel injector for port injection connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition Injector connector (1) - Body ground 11 to 14 V NG --> CHECK AND REPAIR HARNESS OR CONNECTOR (IG2 RELAY - INJECTOR FOR PORT INJECTION) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (ECM - FUEL INJECTOR FOR PORT INJECTION) Disconnect the E6 and E8 ECM connectors. Disconnect the injector for port injection connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition E79-2 - E8-15 (#1P) Below 1 ohms g1-2 - E6-17 (#2P) Below 1 ohms E80-2 - E8-14 (#3P) Below 1 ohms g2-2 - E6-16 (#4P) Below 1 ohms E82-2 - E8-13 (#5P) Below 1 ohms g3-2 - E6-15 (#6P) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E79-2 or E8-15 (#1P) - Body ground 10 kohms or higher g1-2 or E6-17 (#2P) - Body ground 10 kohms or higher E80-2 or E8-14 (#3P) - body ground 10 kohms or higher g2-2 or E6-16 (#4P) - Body ground 10 kohms or higher E82-2 or E8-13 (#5P) - body ground 10 kohms or higher g3-2 or E6-15 (#6P) - body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK FUEL INJECTOR FOR PORT INJECTION (RESISTANCE) Check the fuel injector for port injection resistance Refer to «INSPECTION»(ref-382714-S41495257602011012800000) . NG --> REPLACE FUEL INJECTOR FOR PORT INJECTION OK --> REPLACE ECM

All

P2102

P2103

P2102

P2103

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected and the engine switch is turned off.

Scheme 152

All

P2111 (Throttle actuator stuck open)

P2112 (Throttle actuator stuck closed)

P2111 (Throttle actuator stuck open)

P2112 (Throttle actuator stuck closed)

When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected and then the engine switch is turned off.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 or P2112) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2111 or P2112 A P2111 or P2112 and other DTCs B HINT: If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> REPLACE THROTTLE BODY ASSEMBLY OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine, and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve). Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to No DTC A P2111 or P2112 B B --> REPLACE ECM A --> CHECK FOR INTERMITTENT PROBLEMS

When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected and then the engine switch is turned off.

Scheme 153

When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected and then the engine switch is turned off.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2119) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2119 A P2119 and other DTCs B HINT: If any DTCs other than P2119 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS (DTC P2119) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Allow the engine to idle for 15 seconds. WARNING: Exercise extreme care and take precautions at procedure "A" and "B" below. Failure to do so may result in the vehicle unexpectedly rolling away. Securely apply the parking brake and move the gear selector lever to the D position (Procedure "A"). While depressing the brake pedal securely, fully depress the accelerator pedal for 5 seconds (Procedure "B"). Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. HINT: The output voltage of the throttle position sensor can be checked during procedure "B" using the Techstream. Variations in the output voltage indicate that the throttle actuator is in operation. To check the output voltage using the Techstream, select the following menu items: Powertrain / Engine and ECT / Data List / Throttle Position No. 1. OK No DTC output. NG --> REPLACE THROTTLE BODY ASSEMBLY OK --> END

P2120

P2122

P2123

P2125

P2127

P2128

P2138

When any of DTCs P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM uses the remaining circuit to calculate the accelerator pedal position to allow the vehicle to continue driving. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

Fail-safe mode continues until a pass condition is detected and then the engine switch is turned off.

Scheme 154

The accelerator pedal position sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal opening angle to allow the vehicle to continue driving. If both circuits malfunction, the ECM regards the opening angle of the accelerator pedal as being fully closed. In this case, the throttle valve remains closed as if the engine is idling.

If a pass condition is detected and then the engine switch is turned off, the fail-safe operation stops and the system returns to a normal condition.

1. READ VALUE USING TECHSTREAM (ACCEL POS #1 AND ACCEL POS #2) See step 1 OK --> See step 3 NG: Go to next step
2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY Replace the accelerator pedal rod assembly Refer to «REMOVAL»(ref-382728-S15765327222011012800000) . NEXT: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine. Allow the engine to idle for 15 seconds. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2121 A No output B B --> SYSTEM OK A --> REPLACE ECM

All

Sensor voltage detection monitor

Sensor current detection monitor

Sensor voltage detection monitor (Lean side malfunction P2195, P2197)

Sensor voltage detection monitor (Rich side malfunction P2196, P2198)

Sensor current detection monitor (High side malfunction P2195, P2197)

Sensor current detection monitor (Low side malfunction P2196, P2198)

Refer to CHECKING MONITOR STATUS Refer to CHECK MODE PROCEDURE .

Scheme 155

Scheme 156

Scheme 157

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) .
5. Start the engine, and warm it up until the ECT reaches 75°C (167°F) or higher (Procedure "A").
6. Select the following menu items: Powertrain / Engine and ECT / Data List / Idle Fuel Cut.
7. Drive the vehicle at between 38 mph (60 km/h) and 75 mph (120 km/h) 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 (refer to the following HINT) (Procedure "D"). HINT: Fuel-cut is performed when the following conditions are met: Accelerator pedal is fully released. Engine speed is 2500 rpm or more (fuel injection returns at 1000 rpm).
10. Accelerate the vehicle to 40 mph (64 km/h) 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 declines to less than 6 mph (10 km/h).
13. Repeat procedure from C through F above at least 3 times in one driving cycle. HINT: Completion of all A/F sensor monitors is required to change the value in Test Results. WARNING: Strictly observe posted speed limits, traffic laws, and road conditions when performing these drive patterns.

All

A/F sensor - open circuit between A1A+ and A1A-/A2A+ and A2A- P2237 and P2240

A/F sensor - Low impedance P2238 and P2241

Other

A/F sensor - open circuit between A1A+ and A1A-/A2A+ and A2A- P2237 and P2240

A/F sensor - short circuit between A1A+ and A1A-/A2A+ and A2A- P2238 and P2241

A/F sensor - short circuit between A1A+ and GND/A2A+ and GND P2238 and P2241

A/F sensor admittance Low P2238 and P2241

A/F sensor - short circuit between A1A+ and +B/A2A+ and +B P2239 and P2242

A/F sensor - short circuit between A1A- and GND/A2A- and GND P2252 and P2255

A/F sensor - short circuit between A1A- and +B/A2A- and +B P2253 and P2256

1. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM). Refer to «PROCEDURE - Step 13»(ref-382726-S23637917462011012800000) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. REPLACE AIR FUEL RATIO SENSOR Replace the A/F sensor Refer to «REMOVAL»(ref-382716-S20672511762011012800000) . NEXT: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine. Allow the engine to idle for 5 minutes or more. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. Read pending DTCs. Result Display (DTC Output) Proceed to No output A P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255 or P2256 B B --> REPLACE ECM A --> END

1. Key-off monitor sequence 1 to 8 1. Atmospheric pressure measurement Next sequence is run if following condition is met: - Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) for 1 second 2. First reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2 and 3 1. EVAP pressure just after reference pressure measurement started -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 3. EVAP canister vent valve stuck close stuck check Next sequence is run if following condition is met: - EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more 4. Vacuum introduction Next sequence is run if following condition is met: - EVAP pressure Saturated within 15 minutes 5. EVAP canister purge valve close stuck check Next sequence is run if following condition is met: - EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more 6. Second reference pressure measurement Next sequence is run if all of the following conditions are met: Conditions 1, 2, 3 and 4 1. EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or less 2. Reference pressure -4.85 to -1.057 kPa (-36.4 to -7.93 mmHg) 3. Reference pressure Saturated within 60 seconds 4. Difference between first reference pressure and second reference pressure Less than 0.7 kPa (5.25 mmHg) 7. Leak check Next sequence is run if following condition is met: - EVAP pressure when vacuum introduction complete Second reference pressure or less 8. Atmospheric pressure measurement EVAP monitor is complete if following condition is met - Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa (2.25 mmHg)

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

Case 1

Case 2

Case 3

Case 1

Case 2

Case 3

1. REPLACE ECM NEXT: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG). Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine and wait for 10 minutes or more. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. If no pending DTC is displayed, the repair has been successfully completed. NEXT --> END

HINT

Performing this confirmation pattern will activate the A/F sensor response monitor.

Scheme 158

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs (if set).
5. Select the following menu items: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details.
6. Check that RES RATE B1S1 and B2 S1 are Fail.
7. Start the engine and warm it up. (Proceed "A")
8. Drive the vehicle at a constant speed of between 25 mph and 75 mph (40 km/h and 120 km/h) for 3 minutes. (Proceed "B")
9. Check the monitor result values on the Techstream by selecting the following menu items: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details / RES RATE B1S1 / Details.
10. If the values indicated on the Techstream do not change, perform READINESS MONITOR DRIVE PATTERN for the A/F sensor and the heated oxygen sensor. Refer to «WIRING DIAGRAM»(ref-382724-S25277521642011012800000) . HINT: Completion of all A/F sensor monitors is required to change the value in Test Result.
11. Note the value of the Monitor Result.
12. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
13. Check if any DTCs (any pending DTCs) are set.

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2A00 AND/OR P2A03) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2A00 and/or P2A03 A P2A00 and/or P2A03 and other DTCs B HINT: If any DTCs other than P2A00 or P2A03 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE). Refer to «PROCEDURE - Step 1»(ref-382726-S18098091762011012800000) NG --> REPLACE AIR FUEL RATIO SENSOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM). Refer to «PROCEDURE - Step 13»(ref-382726-S23637917462011012800000) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00 AND/OR P2A03) Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2A00 and/or P2A03 A No output B B --> CHECK FOR INTERMITTENT PROBLEMS A: Go to next step
6. REPLACE AIR FUEL RATIO SENSOR Replace the A/F sensor Refer to «REMOVAL»(ref-382716-S20672511762011012800000) . NEXT: Go to next step
7. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00 AND/OR P2A03) Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to No output A P2A00 and/or P2A03 B B --> REPLACE ECM A --> END

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0101) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC output) Proceed to U0101 A U0101 and other DTCs B B --> GO TO DTC CHART A --> REPLACE ECM

RELATED DTCS

If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

Scheme 159

Note. If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.

Scheme 160

Note. The canister is located near the fuel tank, underneath the body.

Scheme 161

Note. In this vehicle's EVAP system, turning ON the vent valve does not seal off the EVAP system. To check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from the atmosphere side of the canister.

While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is opened by the ECM and stored fuel vapors in the canister are purged into the intake manifold. The ECM changes the duty cycle ratio of the purge VSV to control purge flow volume.

The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when the negative pressure (vacuum) is applied to the canister.

The following 2 monitors run to confirm appropriate EVAP system operation.

Scheme 162

Scheme 163

1. Key-off monitor This monitor checks for EVAP (Evaporative Emission) system leaks and canister pump module malfunctions. The monitor starts 5 hours * after the engine switch is turned off. More than 5 hours are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system monitor more accurate. The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the canister pump module and purge VSV, based on the EVAP pressure. HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the engine switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the engine switch is turned off, the monitor check starts 2.5 hours later.
2. Purge flow monitor The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary. The 1st monitor While the engine is running and the purge VSV (Vacuum Switching Valve) is ON (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor. The 2nd monitor The vent valve is turned OFF (open) and the EVAP pressure is measured. If the variation in the pressure is less than 0.5 kPa (3.75 mmHg), the ECM interprets this as the purge VSV being stuck closed, illuminates the MIL and sets DTC P0441 (2 trip detection logic). Atmospheric pressure check: In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM. Component Operation Canister Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank. Cut-off valve Located in fuel tank. Valve floats and closes when fuel tank 100% full. Purge VSV (Vacuum Switching Valve) Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake manifold controlled by purge VSV duty cycle ratio (current-carrying time). (Open: ON, Closed: OFF) Refueling valve Controls EVAP pressure from fuel tank to canister. Valve consists of diaphragm, spring and restrictor (diameter: 0.08 inch). When fuel vapor and pressure inside fuel tank increase, valve opens. While EVAP purged, valve closes and restrictor prevents large amount of vacuum from affecting pressure in fuel tank. Valve opened while refueling. Roll-over valve Located in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out. Soak timer Built into ECM. To ensure accurate EVAP monitor, measures 5 hours (+/-15 minutes) after engine switch turned off. This allows fuel to cool down, stabilizing EVAP pressure. When approximately 5 hours elapsed, ECM activates see scheme 3 Canister pump module Consists of (a) to (d) below. Canister pump module cannot be disassembled. (a) Vent valve Vents and closes EVAP system. When ECM turns valve ON, EVAP system closed. When, ECM turns valve OFF, EVAP system vented. Negative pressure (vacuum) created in EVAP system to check for EVAP leaks by closing purge VSV, turning on vent valve (closed) and operating leak detection pump see scheme 1 (b) Canister pressure sensor Indicates pressure as voltages. ECM supplies regulated 5 V to canister pressure sensor, and uses feedback from sensor to monitor EVAP system pressure see scheme 2 (c) Leak detection pump Creates negative pressure (vacuum) in EVAP system for leak check. (d) Reference orifice Has opening with 0.02 inch diameter. Vacuum produced through orifice by closing purge VSV, turning off vent valve and operating leak detection pump, to monitor reference pressure. Reference pressure indicates small leak of EVAP.

Scheme 164

HINT

After a repair, check the Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below.

1. Key-off monitor confirmation Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway) The fuel tank is less than 90% full The altitude is less than 8000 ft (2400 m) The Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F) The Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F) The vehicle remains stationary (the vehicle speed is 0 mph [0 km/h]) Monitor Conditions Allow the engine to idle for at least 5 minutes. Turn the engine switch off and wait for 6 hours (8 or 10.5 hours). HINT: Do not start the engine until checking MONITOR STATUS. If the engine is started, the steps described above must be repeated. Monitor Status Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Utility / Monitor. Check the Monitor Status displayed on the tester. HINT: If Incomplete is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the Monitor Conditions again.
2. Purge flow monitor confirmation (P0441) HINT: Perform this monitor confirmation after the Key-Off Monitor Confirmation shows Complete. Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway) The ECT is between 4.4°C and 35°C (40°F and 95°F) The IAT is between 4.4°C and 35°C (40°F and 95°F) Monitor Conditions Release the pressure from the fuel tank by removing and reinstalling the fuel cap. Warm the engine up until the ECT reaches more than 75°C (167°F). Increase the engine speed to 3000 rpm once. Allow the engine to idle and turn A/C ON for 1 minute. Monitor Status Turn the engine switch off (if on or the engine is running). Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Utility / Monitor. Check the Monitor Status displayed on the Techstream. HINT: If Incomplete is displayed, the monitor is not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

Refer to CHECKING MONITOR STATUS Refer to CHECKING MONITOR STATUS .

Scheme 165

Scheme 166