Engine Control (1AR-FE) (Diagnostic Codes (P0010-P0455): Diagnosis

INSPECTION PROCEDURE

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

Scheme 223

Scheme 223: PROCEDURE

Scheme 224

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Turn the A/C switch on. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) NG --> See step 2 OK --> See step 6
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the camshaft timing oil control valve assembly (for intake camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly (for Intake Camshaft)) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly (for intake camshaft). NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) Disconnect the camshaft timing oil control valve assembly (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B53-1 - B58-36 (OC1+) Always Below 1 ohms B53-2 - B58-59 (OC1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B53-1 or B58-36 (OC1+) - Body ground Always 10 kohms or higher B53-2 or B58-59 (OC1-) - Body ground Always 10 kohms or higher Reconnect the camshaft timing oil control valve assembly (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «REMOVAL»(ref-394781-S02000726392011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)

HINT

DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

Scheme 225

Scheme 226

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0011 or P0012 is output A DTC P0011 or P0012 and other DTCs are output B HINT: If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Turn the A/C switch on. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) NG --> See step 4 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0011 or P0012 is output B HINT: DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter. B --> See step 4 A --> See step 9
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Remove the camshaft timing oil control valve assembly (for intake camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly (for Intake Camshaft)) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly (for intake camshaft). NG --> See step 12 OK: Go to next step
CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) Remove the cylinder head cover. Refer to «REMOVAL»(ref-394763-S30122264022011040800000) . TEXT IN ILLUSTRATION *1 Timing Mark - - Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover. Check that the timing marks of the camshaft timing gears are aligned with the timing marks as shown in the illustration. OK Timing marks on camshaft timing gears are aligned as shown in the illustration. Reinstall the cylinder head cover. Refer to «INSTALLATION»(ref-394763-S24043673532011040800000) . NG --> See step 11 OK: Go to next step
INSPECT CAMSHAFT TIMING GEAR ASSEMBLY Inspect the camshaft timing gear assembly. Refer to «INSPECTION - Step 6»(ref-394763-S23199002032011040800000) . NG --> See step 15 OK: Go to next step
INSPECT OIL CONTROL VALVE FILTER Remove the oil control valve filter. Refer to «DISASSEMBLY - Step 39»(ref-394763-S13076447772011040800000) . Check that the filter is not clogged. OK Filter is not clogged. TEXT IN ILLUSTRATION *1 Oil Control Valve Filter Reinstall the oil control valve filter. Refer to «REASSEMBLY - Step 18»(ref-394763-S09503837382011040800000) . NG --> See step 13 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0011 or P0012 is output B HINT: DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter. B --> See step 14 A --> See step 9
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394618-S20895286482011040800000)
ADJUST VALVE TIMING. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-394781-S02000726392011040800000)
REPLACE OIL CONTROL VALVE FILTER. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY. Refer to «REMOVAL»(ref-394763-S30122264022011040800000)

HINT

If DTC P0013 is output, check the VVT system (for exhaust camshaft) circuit.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

Scheme 227

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Turn the A/C switch on. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream. Result Techstream Operation Specified Condition 0% (OFF) Normal engine speed 127% (ON) Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) NG --> See step 2 OK --> See step 4
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) Remove the camshaft timing oil control valve assembly (for exhaust camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly (for Exhaust Camshaft)) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly (for exhaust camshaft). NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) Disconnect the camshaft timing oil control valve assembly (for exhaust camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B54-1 - B58-35 (OE1+) Always Below 1 ohms B54-2 - B58-58 (OE1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B54-1 or B58-35 (OE1+) - Body ground Always 10 kohms or higher B54-2 or B58-58 (OE1-) - Body ground Always 10 kohms or higher Reconnect the camshaft timing oil control valve assembly (for exhaust camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) OK --> See step 6
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT). Refer to «REMOVAL»(ref-394781-S02000726392011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

DTC P0014 or P0015 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

HINT

DTC P0016 or P0017 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

Scheme 228

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 AND P0017) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0016 or P0017 is output A DTC P0016 or P0017 and other DTCs are output B HINT: If any DTCs other than P0016 or P0017 are output, troubleshoot those DTCs first. B --> See step 13 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Check the camshaft timing oil control valve assembly for intake camshaft. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) Check the camshaft timing oil control valve assembly for exhaust camshaft. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream. Result Techstream Operation Specified Condition 0% (OFF) Normal engine speed 127% (ON) Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) HINT: If the VVT system can be operated using the Active Test, it can be assumed that the VVT system is operating normally. NG --> See step 4 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0017) Connect the Techstream to the DLC 3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0016 or P0017 is output B HINT: DTC P0016 or P0017 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter. B --> See step 4 A --> See step 14
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE OR EXHAUST CAMSHAFT) HINT: Inspect the specified camshaft timing oil control valve assembly (for intake or exhaust camshaft) in accordance with the inspection result of step 2. Remove the camshaft timing oil control valve assembly (for intake or exhaust camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly (for Intake or Exhaust Camshaft)) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly (for intake or exhaust camshaft). NG --> See step 12 OK: Go to next step
CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) See step 5 NG --> See step 16 OK: Go to next step
INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (INTAKE OR EXHAUST CAMSHAFT) Inspect the camshaft timing gear assembly (camshaft timing gear assembly for intake or exhaust camshaft). Refer to «INSPECTION - Step 6»(ref-394763-S23199002032011040800000) . NG --> See step 15 OK: Go to next step
INSPECT OIL CONTROL VALVE FILTER See step 7 NG --> See step 11 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0017) Connect the Techstream to the DLC 3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0016 or P0017 is output B HINT: DTC P0016 or P0017 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter. B --> See step 9 A --> See step 10
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE OIL CONTROL VALVE FILTER. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE OR EXHAUST CAMSHAFT). Refer to «REMOVAL»(ref-394781-S02000726392011040800000)
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394618-S20895286482011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY. Refer to «REMOVAL»(ref-394763-S30122264022011040800000)
ADJUST VALVE TIMING. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)

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

HINT

Scheme 229

Scheme 229: PROCEDURE

Scheme 230

INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the air fuel ratio sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 7 OK: Go to next step
CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR) Disconnect the air fuel ratio sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B7-2 (+B) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B7-1 (HA1A) - B58-18 (HA1A) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B7-1 (HA1A) or B58-18 (HA1A) - Body ground Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0031, P0032 OR P101D) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Allow the vehicle to drive in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC P0031, P0032 or P101D is output B B --> See step 8 A --> See step 10
INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (EFI MAIN NO. 2 RELAY) Inspect the EFI MAIN No. 2 relay. Refer to «INSPECTION»(ref-394787-S04051205062011040800000) . NG --> See step 9 OK: Go to next step
CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - EFI MAIN NO. 2 RELAY) Disconnect the air fuel ratio sensor connector. Remove the engine room junction block assembly from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B7-2 (+B) - 1F-9 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B7-2 (+B) or 1F-9 - Body ground Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. Reinstall the engine room junction block assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI MAIN NO. 2 RELAY)
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394781-S34213589082011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-394787-S17959955042011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)

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

HINT

Scheme 231

Scheme 231: PROCEDURE

Scheme 232

INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HT1B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT1B) - 4 (E2) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 5 OK: Go to next step
CHECK TERMINAL VOLTAGE (POWER SOURCE) Disconnect the heated oxygen sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B57-2 (+B) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 8 OK: Go to next step
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B57-1 (HT1B) - B58-41 (HT1B) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B57-1 (HT1B) or B58-41 (HT1B) - Body ground Always 10 kohms or higher Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038, P0141 OR P102D) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Allow the vehicle to drive in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the Pending DTCs. Result Result Proceed to DTC P0037, P0038, P0141 or P102D is output A DTC is not output B B --> See step 7 A --> See step 6
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (EFI MAIN NO. 2 RELAY) Inspect the EFI MAIN No. 2 relay. Refer to «INSPECTION»(ref-394787-S04051205062011040800000) . NG --> See step 10 OK: Go to next step
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - EFI MAIN NO. 2 RELAY) Disconnect the heated oxygen sensor connector. Remove the engine room junction block assembly from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B57-2 (+B) - 1F-9 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B57-2 (+B) or 1F-9 - Body ground Always 10 kohms or higher Reconnect the heated oxygen sensor connector. Reinstall the engine room junction block assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI MAIN NO. 2 RELAY)
REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-394787-S17959955042011040800000)

HINT

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

HINT

Scheme 233

Scheme 233: PROCEDURE

Scheme 234

Scheme 235

READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0102 is output A DTC P0103 is output B B --> See step 5 A: Go to next step
INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE) Disconnect the mass air flow meter connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B3-3 (+B) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter) Reconnect the mass air flow meter connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI MAIN RELAY - MASS AIR FLOW METER) OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B3-5 (VG) - B58-94 (VG) Always Below 1 ohms B3-4 (E2G) - B58-117 (E2G) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B3-5 (VG) or B58-94 (VG) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT MASS AIR FLOW METER Perform On-vehicle Inspection. Refer to «ON-VEHICLE INSPECTION»(ref-394781-S08511583522011040800000) . Perform Inspection. Refer to «INSPECTION»(ref-394781-S39936189062011040800000) . Inspect the function of the mass air flow meter. Remove the mass air flow meter with the connector connected. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF. Blow air to the mass air flow meter and check that the intake air amount reading changes. OK The reading changes. NG --> See step 7 OK --> See step 8
CHECK HARNESS AND CONNECTOR (SENSOR GROUND) Disconnect the mass air flow meter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B3-4 (E2G) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter) Reconnect the mass air flow meter connector. NG --> See step 6 OK --> See step 9
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B3-4 (E2G) - B58-117 (E2G) Always Below 1 ohms Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394781-S30673330062011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394781-S30673330062011040800000)

Scheme 236

Scheme 236: DESCRIPTION

The intake air temperature sensor, mounted on the mass air flow meter, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (Scheme 236)
The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.
Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, according to changes in the intake air temperature, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.

DTC No.	DTC Detection Condition	Trouble Area
P0111	When either of the following conditions is met (2 trip detection logic): In the duration between when the engine is warmed up and the next engine start, the change in the intake air temperature sensor output is below the threshold. While the engine is warming up after a cold engine start, the change in the intake air temperature sensor output is below the threshold.	Mass air flow meter

HINT

Scheme 237

Scheme 237: PROCEDURE

Scheme 238

READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard Same as actual intake air temperature. Result Result Proceed to -40°C (-40°F) A 140°C (284°F) or higher B Same as actual intake air temperature C HINT: If there is an open circuit, the Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream indicates 140°C (284°F) or higher. C --> See step 6 B --> See step 4 A: Go to next step
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Confirm good connection at the mass air flow meter. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter *2 ECM *3 Front view of wire harness connector (to Mass Air Flow Meter) - - Disconnect the mass air flow meter connector. Connect terminals THA and E2 of the mass air flow meter connector on the wire harness side. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard 140°C (284°F) or higher Reconnect the mass air flow meter connector. NG --> See step 3 OK --> See step 7
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B3-1 (THA) - B58-116 (THA) Always Below 1 ohms B3-2 (E2) - B58-93 (ETHA) Always Below 1 ohms Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM) OK --> See step 8
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the mass air flow meter connector. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter *2 ECM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard -40°C (-40°F) Reconnect the mass air flow meter connector. NG --> See step 5 OK --> See step 7
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B3-1 (THA) or B58-116 (THA) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM) OK --> See step 8
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394781-S30673330062011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

Scheme 239

Scheme 239: PROCEDURE

Scheme 240

READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp. Read the value displayed on the Techstream. Standard Same as actual engine coolant temperature. Result Result Proceed to Displayed temperature is -40°C (-40°F) A Displayed temperature is 140°C (284°F) or more B Same as actual engine coolant temperature C HINT: If there is an open circuit, the Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream indicates 140°C (284°F) or more. C --> See step 6 B --> See step 4 A: Go to next step
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Confirm good connection at the engine coolant temperature sensor connector. TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM *3 Front view of wire harness connector (to Engine Coolant Temperature Sensor) - - Disconnect the engine coolant temperature sensor connector. Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp. Read the value displayed on the Techstream. Standard 140°C (284°F) or more Reconnect the engine coolant temperature sensor connector. NG --> See step 3 OK --> See step 7
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B6-2 - B58-64 (THW) Always Below 1 ohms B6-1 - B58-65 (ETHW) Always Below 1 ohms Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) OK --> See step 8
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the engine coolant temperature sensor connector. TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp. Read the value displayed on the Techstream. Standard -40°C (-40°F) Reconnect the engine coolant temperature sensor connector. NG --> See step 5 OK --> See step 7
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B6-2 or B58-64 (THW) - Body ground Always 10 kohms or higher Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) OK --> See step 8
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394781-S17558626842011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

If any of DTCs P0115, P0117, P0118 or P0125 are output simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

HINT

Scheme 241

Scheme 241: PROCEDURE

READ VALUE USING TECHSTREAM (THROTTLE POSITION SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / ETCS / Throttle Position No. 1 and Throttle Position No. 2. Read the values displayed on the Techstream. RESULT When Accelerator Pedal Released When Accelerator Pedal Depressed Trouble Area Proceed to Throttle Position No. 1 Throttle Position No. 2 Throttle Position No. 1 Throttle Position No. 2 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V VC circuit open A 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V E2 circuit open 0 to 0.2 V, or 4.5 to 5.0 V 2.1 to 3.1 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 2.1 to 3.1 V (Fail-safe) VTA1 circuit open or ground short 0.6 to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 0.6 to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V VTA2 circuit open or ground short 0.5 to 1.1 V 2.1 to 3.1 V 3.2 to 4.8 V (Not fail-safe) 4.6 to 5.0 V (Not fail-safe) Throttle position sensor circuit normal B HINT: DTC P0121 is stored when the voltages output from VTA1 and VTA2 are not consistent with the characteristics of the sensors. Therefore, check the Freeze Frame Data when this DTC is output. Use the following formula to confirm relative fluctuations in voltage. Features of sensor output VTA2 x 0.8 is approximately equal to VTA1 + 1.11 V VTA1: Throttle Position No. 1 VTA2: Throttle position No. 2 If DTC P0121 is output, proceed to the "CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)". B --> See step 5 A: Go to next step
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the throttle position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B1-5 (VC) - B58-88 (VCTA) Always Below 1 ohms B1-6 (VTA) - B58-90 (VTA1) Always Below 1 ohms B1-4 (VTA2) - B58-89 (VTA2) Always Below 1 ohms B1-3 (E2) - B58-111 (ETA) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B1-5 (VC) or B58-88 (VCTA) - Body ground Always 10 kohms or higher B1-6 (VTA) or B58-90 (VTA1) - Body ground Always 10 kohms or higher B1-4 (VTA2) or B58-89 (VTA2) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the throttle position sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE POSITION SENSOR - ECM) OK: Go to next step
INSPECT ECM (VC VOLTAGE) Disconnect the throttle position sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B1-5 (VC) - B1-3 (E2) Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Throttle Position Sensor) Reconnect the throttle position sensor connector. NG --> See step 6 OK: Go to next step
REPLACE THROTTLE BODY Replace the throttle body. Refer to «REMOVAL»(ref-394781-S01701351132011040800000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Start the engine. Allow the engine to idle for 15 seconds or more. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0120, P0121, P0122, P0123, P0220, P0222, P0223, and/or P2135 are output A DTC is not output B B --> END A --> See step 6
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

If any of DTCs P0115, P0116, P0117 or P0118 are output simultaneously with DTC P0125, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

HINT

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 to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1 S1 and O2S B1 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.

Techstream Display (Sensor)	Injection Volume	Status	Voltage
AFS Voltage B1 S1 (Air fuel ratio)	+25%	Rich	Below 3.1 V
AFS Voltage B1 S1 (Air fuel ratio)	12.5%	Lean	Higher than 3.4 V
O2S B1 S2 (Heated oxygen)	+25%	Rich	Higher than 0.55 V
O2S B1 S2 (Heated oxygen)	12.5%	Lean	Below 0.4 V

Note. 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.

Case Air Fuel Ratio Sensor (Bank 1 Sensor 1) Output Voltage Heated Oxygen Sensor (Bank 1 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 4 Injector Fuel pressure Gas leak from exhaust system (Air fuel ratio extremely rich or lean)

Scheme 242

Scheme 243

Scheme 244

Scheme 245

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.
To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / All Data / AFS Voltage B1 S1 and O2S B1 S2; and then press the graph button on the Data List view.

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

HINT

Scheme 246

Scheme 246: PROCEDURE

Scheme 247

Scheme 248

READ OUTPUT DTC (DTC P0136, P0137, P0138 OR P0139) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0138 is output A DTC P0137 is output B DTC P0136 is output C DTC P0139 is output D D --> See step 24 C --> See step 7 B --> See step 9 A: Go to next step
READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2. Allow the engine to idle. Read the heated oxygen sensor output voltage while idling. Result Result Proceed to 1.0 V or higher A Below 1.0 V B B --> See step 5 A: Go to next step
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 23 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch off and wait for 5 minutes or more. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B58-41 (HT1B) - B58-125 (OX1B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 22
PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine and warm it up. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume. 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 Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1 S1 (Air fuel ratio) Alternates between higher than and below 3.3 V OK Remains at higher than 3.3 V NG Remains at below 3.3 V NG 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 --> See step 15 OK: Go to next step
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. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Drive the vehicle according to the drive pattern listed below: Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or higher. Drive the vehicle at 37 mph (60 km/h) or more and decelerate the vehicle for 5 seconds or more. Repeat the step above at least 3 times. Enter the following menus: Powertrain / Engine / Monitor / O2 Sensor / Details. Confirm that RANGE B1S1 / Result is either Pass or Fail. If the Techstream shows Fail, recheck RANGE B1S1 / Result after performing the drive pattern. Select the RANGE B1S1 / Details. 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 --> See step 15 OK --> See step 12
READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine. Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2. After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes. 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 0.55 V or higher. NG --> See step 9 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine and warm it up. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume. 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 Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1 S1 (Air fuel ratio) Alternates between higher than and below 3.3 V OK Remains at higher than 3.3 V NG Remains at below 3.3 V NG 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 --> See step 15 OK --> See step 21
CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 20 OK: Go to next step
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B57-1 (HT1B) - B58-41 (HT1B) Always Below 1 ohms B57-3 (OX1B) - B58-125 (OX1B) Always Below 1 ohms B57-4 (E2) - B58-102 (O1B-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B57-1 (HT1B) or B58-41 (HT1B) - Body ground Always 10 kohms or higher B57-3 (OX1B) or B58-125 (OX1B) - Body ground Always 10 kohms or higher Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor. Refer to «REMOVAL»(ref-394781-S41059805092011040800000) . NEXT: Go to next step
PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream on (Step A). Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B). 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: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input DTCs: P0136, P0137 and P0138. Check the DTC judgment. Result Result Proceed to NORMAL (No DTC output) A ABNORMAL (P0136, P0137 or P0138 is output) B B --> See step 19 A --> REPAIR COMPLETED
REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-394781-S34213589082011040800000) . NEXT: Go to next step
PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream on (Step A). Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B). 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: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136 OR P0138) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input DTCs: P0136 and P0138. Check the DTC judgment. Result Result Proceed to NORMAL (No DTC output) A ABNORMAL (P0136 or P0138 is output) B B --> See step 18 A --> REPAIR COMPLETED
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394781-S34213589082011040800000)
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)
CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO. Refer to «INSPECTION PROCEDURE»(ref-394782-S05364400692011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)
READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / O2S B1 S2. After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes. Allow the engine to idle. Depress the accelerator pedal quickly until the engine speed reaches 2500 rpm 3 times. Result Result Proceed to Higher than 1.0 V A Below 1.0 V B B --> See step 27 A: Go to next step
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 28 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch off and wait for 5 minutes or more. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B58-41 (HT1B) - B58-125 (OX1B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 30
READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream on (Step A). Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher (Step B). 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). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness (Step D). Input DTCs: P0139. 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 Result Proceed to ABNORMAL (P0139 is output) A NORMAL (No DTC output) B B --> See step 29 A --> See step 31
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394781-S41059805092011040800000)

HINT

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1 S1 and O2S B1 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.

Techstream Display (Sensor)	Injection Volume	Status	Voltage
AFS Voltage B1 S1 (Air fuel ratio)	+25%	Rich	Below 3.1 V
AFS Voltage B1 S1 (Air fuel ratio)	12.5%	Lean	Higher than 3.4 V
O2S B1 S2 (Heated oxygen)	+25%	Rich	Higher than 0.55 V
O2S B1 S2 (Heated oxygen)	12.5%	Lean	Below 0.4 V

Note. 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.

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.
To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / All Data / AFS Voltage B1 S1 and O2S B1 S2; then press the graph button on the Data List view.

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

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.
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.
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.

HINT

If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.
If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored in the ECM as freeze frame data.
If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame data have been reproduced, one of the following factors is considered to be a possible cause of the problem: There was insufficient fuel in the tank. Improper fuel was used. The spark plugs have been contaminated. The problem requires further diagnosis.
After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #4 Misfire Count).
Be sure to confirm that no misfiring cylinder DTCs are stored again by conducting the confirmation driving pattern after finishing repairs.
When one of Short FT #1 or Long FT #1 in the freeze frame data is outside the range of +/-20%, the air fuel ratio may be rich (-20% or less) or lean (+20% or more).
When Coolant Temp in the freeze frame data is below 75°C (167°F), the misfires have occurred only while warming up the engine.
An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

Scheme 249

Scheme 249: PROCEDURE

Scheme 250

Scheme 251

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. HINT: Write down the output DTCs. Result Result Proceed to P0300, P0301, P0302, P0303 and/or P0304 A P0300, P0301, P0302, P0303 and/or P0304 and other DTCs B HINT: If any DTCs other than P0300, P0301, P0302, P0303 and P0304 are output, troubleshoot those DTCs first. B --> See step 31 A: Go to next step
CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-394784-S39441452282011040800000) . OK PCV hose is correctly connected and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Misfire / Misfire RPM and Misfire Load. Read and note the Misfire RPM and Misfire Load values. HINT: The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred. NEXT: Go to next step
READ VALUE USING TECHSTREAM (CATALYST OT MF F/C) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Catalyst OT MF F/C. Read the value displayed on the Techstream. Result Data List Techstream Display Proceed to Catalyst OT MF F/C Avail A Not Avl B B --> See step 6 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (PROHIBIT THE CATALYST OT MISFIRE PREVENT F/C) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire prevent F/C. Perform the Active Test. NOTE: When performing the Active Test, make sure the vehicle is stopped and the engine is either idling or being revved within 3000 rpm. NEXT: Go to next step
READ VALUE USING TECHSTREAM (CYLINDER MISFIRE COUNT) Enter the following menus: Powertrain / Engine / Data List / All Data / Misfire / Cylinder #1 Misfire Count, Cylinder #2 Misfire Count, Cylinder #3 Misfire Count and Cylinder #4 Misfire Count. Start the engine and allow the engine to idle. Read each value for Cylinder #1 Misfire Count to Cylinder #4 Misfire Count displayed on the Techstream. If no misfire counts occur in any cylinders, perform steps (d) and (e) and then check the misfire counts again. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using Techstream (Misfire RPM and Misfire Load)" procedure above. Read the Cylinder #1 Misfire Count to Cylinder #4 Misfire Count or DTCs displayed on the Techstream. Result Result (Misfire Count) Proceed to Most misfires occur in only 1 or 2 cylinders A 3 cylinders or more have equal misfire counts B HINT: If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal. If the freeze frame data record of the engine coolant temperature is below 75°C (167°F), the misfire may be detected only when the engine is cold. If the freeze frame data record of the Engine Run Time is below 120 seconds, the misfire may be detected immediately after the engine is started. B --> See step 18 A: Go to next step
INSPECT SPARK PLUG Remove the ignition coil and the spark plug from the misfiring cylinder. Check the electrode for carbon deposits. NOTE: If necessary, clean the spark plug. RECOMMENDED SPARK PLUG Manufacturer Product DENSO SK16HR11 Measure the spark plug electrode gap. Maximum Electrode Gap for Used Spark Plug 1.3 mm (0.0512 in.) If the gap is greater than the maximum, replace the spark plug. Electrode Gap for New Spark Plug 1.0 to 1.1 mm (0.0394 to 0.0433 in.) TEXT IN ILLUSTRATION *1 Electrode Gap Reinstall the ignition coil and spark plug. NG --> See step 32 OK: Go to next step
CHECK FOR SPARK (SPARK TEST) Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all the injector connectors. Remove the ignition coil from the cylinder head. Install the spark plug onto the ignition coil. Attach the spark plug assembly to the cylinder head. Crank the engine for less than 2 seconds and check for spark. NOTE: Do not crank the engine for more than 2 seconds. OK Spark jumps across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 9»(ref-394763-S37611705072011040800000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30 AND/OR #40 VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B58-85 (#10) - Body ground Ignition switch ON 11 to 14 V B58-84 (#20) - Body ground Ignition switch ON 11 to 14 V B58-83 (#30) - Body ground Ignition switch ON 11 to 14 V B58-82 (#40) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Reconnect the ECM connector. NG --> See step 33 OK: Go to next step
CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor). Refer to «INSPECTION»(ref-394783-S35878897132011040800000) . NG --> See step 34 OK: Go to next step
CHECK INTAKE SYSTEM Check the intake system for vacuum leakage. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-394784-S39441452282011040800000) . OK No leakage from intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
CHECK INTAKE AIR CONTROL VALVE (FOR TUMBLE CONTROL VALVE) Check the intake air control valve for tumble control valve. Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-394784-S39441452282011040800000) . NG --> See step 35 OK: Go to next step
CHECK VALVE TIMING See step 5 NG --> See step 36 OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394788-S02459199382011040800000) . NG --> REPAIR OR REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE OR FILTER OK: Go to next step
READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 37 OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect the mass air flow meter See step 4 . NG --> See step 38 OK --> See step 40
CHECK INTAKE SYSTEM Check the intake system for vacuum leakage. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-394784-S39441452282011040800000) . OK No leakage from intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
CHECK INTAKE AIR CONTROL VALVE (FOR TUMBLE CONTROL VALVE) Check the intake air control valve for tumble control valve. Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-394784-S39441452282011040800000) . NG --> See step 35 OK: Go to next step
CHECK VALVE TIMING See step 5 NG --> See step 36 OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394788-S02459199382011040800000) . NG --> REPAIR OR REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE OR FILTER OK: Go to next step
READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 37 OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect the mass air flow meter See step 4 . NG --> See step 38 OK: Go to next step
INSPECT SPARK PLUG Remove the ignition coil and the spark plug from the misfiring cylinder. Check the electrode for carbon deposits. NOTE: If necessary, clean the spark plug. RECOMMENDED SPARK PLUG Manufacturer Product DENSO SK16HR11 Measure the spark plug electrode gap. Maximum Electrode Gap for Used Spark Plug 1.3 mm (0.0512 in.) If the gap is greater than the maximum, replace the spark plug. Electrode Gap for New Spark Plug 1.0 to 1.1 mm (0.0394 to 0.0433 in.) TEXT IN ILLUSTRATION *1 Electrode Gap Reinstall the ignition coil and spark plug. NG --> See step 32 OK: Go to next step
CHECK FOR SPARK (SPARK TEST) Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all the injector connectors. Remove the ignition coil from the cylinder head. Install the spark plug onto the ignition coil. Attach the spark plug assembly to the cylinder head. Crank the engine for less than 2 seconds and check for spark. NOTE: Do not crank the engine for more than 2 seconds. OK Spark jumps across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 9»(ref-394763-S37611705072011040800000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30 AND/OR #40 VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B58-85 (#10) - Body ground Ignition switch ON 11 to 14 V B58-84 (#20) - Body ground Ignition switch ON 11 to 14 V B58-83 (#30) - Body ground Ignition switch ON 11 to 14 V B58-82 (#40) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Reconnect the ECM connector. NG --> See step 33 OK: Go to next step
CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor). Refer to «INSPECTION»(ref-394783-S35878897132011040800000) . NG --> See step 34 OK --> See step 40
CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Change the installed spark plug to a known good spark plug. Perform a spark test. WARNING: Always disconnect all the injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug into the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Touch the spark plug to the cylinder head bolts. Check if sparks occur while the engine is being cranked. OK Spark jumps across electrode gap. NG --> See step 30 OK --> See step 32
CHANGE TO KNOWN GOOD IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER Change the known good ignition coil. Perform a spark test. WARNING: Always disconnect all the injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug into the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Touch the spark plug to the cylinder head bolts. Check if spark occurs while the engine is being cranked. OK Spark jumps across electrode gap. NG --> See step 40 OK --> See step 39
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394618-S20895286482011040800000)
REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-394781-S11128243982011040800000)
GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-394778-S08520238202011040800000)
REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-394783-S19089172552011040800000)
REPLACE INTAKE AIR CONTROL VALVE (FOR TUMBLE CONTROL VALVE). Refer to «REMOVAL»(ref-394789-S38375711352011040800000)
ADJUST VALVE TIMING. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394781-S17558626842011040800000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394781-S30673330062011040800000)
REPLACE IGNITION COIL. Refer to «REMOVAL»(ref-394781-S11128243982011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

Scheme 252

Scheme 252: PROCEDURE

Scheme 253

READ VALUE USING TECHSTREAM (KNOCK FEEDBACK VALUE) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine / Data List / All Data / Knock Feedback Value. Read the value while driving the vehicle. OK The value changes. HINT: Malfunction does not occur Knock Feedback Value changes Malfunctions occur Knock Feedback Value does not change The knock feedback value change can be confirmed by running the engine with a high load, for example, by activating the air conditioning system and racing the engine. NG --> See step 2 OK --> See step 5
INSPECT ECM (KNK1 VOLTAGE) Disconnect the knock sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition U2-2 - U2-1 Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Knock Sensor) Reconnect the knock sensor connector. NG --> See step 4 OK: Go to next step
INSPECT KNOCK SENSOR Remove the knock sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 120 to 280 kohms TEXT IN ILLUSTRATION *1 Component without harness connected (Knock Sensor) *2 Ohmmeter Reinstall the knock sensor. NG --> See step 7 OK --> See step 6
CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR) Disconnect the knock sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition U2-2 - B58-87 (KNK1) Always Below 1 ohms U2-1 - B58-110 (EKNK) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition U2-2 or B58-87 (KNK1) - Body ground Always 10 kohms or higher Reconnect the knock sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-394781-S23081677682011040800000)

HINT

After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor. Installation condition of the camshaft position sensor Installation condition of the camshaft Connection of the camshaft position sensor connector
If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the procedure below: Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Engine Speed. The engine speed may be indicated as zero despite the crankshaft revolving normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as less than the actual engine speed if the crankshaft position sensor output voltage is insufficient.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.

Scheme 254

Scheme 254: PROCEDURE

READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Engine Speed. Start the engine. Read the values displayed on the Techstream while the engine is running. OK Correct values are displayed. HINT: To check the engine speed change, display the graph on the Techstream. If the engine does not start, check the engine speed while cranking. If the engine speed indicated on the Techstream remains at zero (0), there may be an open or short in the crankshaft position sensor circuit. NG --> See step 2 OK --> See step 8
INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) Inspect the crankshaft position sensor. Refer to «INSPECTION»(ref-394781-S15019831492011040800000) . NG --> See step 9 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B35-1 - B58-74 (NE+) Always Below 1 ohms B35-2 - B58-120 (NE-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B35-1 or B58-74 (NE+) - Body ground Always 10 kohms or higher B35-2 or B58-120 (NE-) - Body ground Always 10 kohms or higher Reconnect the crankshaft position sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Check the crankshaft position sensor installation. OK Sensor is installed correctly. NG --> See step 10 OK: Go to next step
INSPECT CRANK ANGLE SENSOR PLATE (TEETH OF SENSOR PLATE) Check the teeth of the crank angle sensor plate. OK Crank angle sensor plate does not have any cracks or deformation. NG --> See step 11 OK: Go to next step
REPLACE CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-394781-S07136936572011040800000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Start the engine. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC P0335 or P0339 is output B HINT: If the engine does not start, replace the ECM. B --> See step 12 A --> REPAIR COMPLETED
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394618-S26532322762011040800000)
REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-394781-S07136936572011040800000)
SECURELY REINSTALL SENSOR. Refer to «INSPECTION»(ref-394781-S15019831492011040800000)
REPLACE CRANKSHAFT. Refer to «REMOVAL»(ref-394763-S21778950132011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.
If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.

Scheme 255

Scheme 255: PROCEDURE

Scheme 256

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0340, P0342 OR P0343) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0340, P0342 or P0343 is output A DTC P0340, P0342 or P0343 and other DTCs are output B HINT: If any DTCs other than P0340, P0342 or P0343 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
INSPECT CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) (POWER SOURCE) Disconnect the camshaft position sensor (for intake camshaft) connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B55-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Camshaft Position Sensor (for Intake Camshaft)) Reconnect the camshaft position sensor (for intake camshaft) connector. NG --> See step 9 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B55-1 (VVI+) - B58-76 (G2+) Always Below 1 ohms B55-2 (VVI-) - B58-122 (G2-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B55-1 (VVI+) or B58-76 (G2+) - Body ground Always 10 kohms or higher B55-2 (VVI-) or B58-122 (G2-) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT) Check the camshaft position sensor (for intake camshaft) installation. OK Sensor is installed correctly. NG --> See step 11 OK: Go to next step
INSPECT INTAKE CAMSHAFT (TIMING ROTOR) Check the timing rotor of the intake camshaft. OK Camshaft timing rotor does not have any cracks or deformation. NG --> See step 12 OK: Go to next step
CHECK VALVE TIMING Check the valve timing See step 5 . NG --> See step 14 OK: Go to next step
REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) Replace the camshaft position sensor. Refer to «REMOVAL»(ref-394781-S00494618902011040800000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Start the engine and allow the engine to idle for 10 seconds or more. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the Pending DTCs. Result Result Proceed to DTC P0340, P0342 or P0343 is output A DTC is not output B HINT: If the engine does not start, replace the ECM. B --> REPAIR COMPLETED A --> See step 13
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B55-3 (VC) - B58-99 (VCV1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B55-3 (VC) or B58-99 (VCV1) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394618-S20895286482011040800000)
SECURELY REINSTALL SENSOR. Refer to «INSPECTION»(ref-394781-S15019831492011040800000)
REPLACE INTAKE CAMSHAFT. Refer to «REMOVAL»(ref-394763-S30122264022011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
ADJUST VALVE TIMING. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)

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

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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.
If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.

Scheme 257

Scheme 257: PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0365, P0367 OR P0368) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0365, P0367 or P0368 is output A DTC P0365, P0367 or P0368 and other DTCs are output B HINT: If any DTCs other than P0365, P0367 or P0368 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
INSPECT CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT) (POWER SOURCE) Disconnect the camshaft position sensor (for exhaust camshaft) connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B56-3 (VC2) - Body ground Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Camshaft Position Sensor (for Exhaust Camshaft)) Reconnect the camshaft position sensor (for exhaust camshaft) connector. NG --> See step 9 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for exhaust camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B56-1 (VVE+) - B58-75 (EV1+) Always Below 1 ohms B56-2 (VVE-) - B58-121 (EV1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B56-1 (VVE+) or B58-75 (EV1+) - Body ground Always 10 kohms or higher B56-2 (VVE-) or B58-121 (EV1-) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for exhaust camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR FOR EXHAUST CAMSHAFT) Check the camshaft position sensor (for exhaust camshaft) installation. OK Sensor is installed correctly. NG --> See step 11 OK: Go to next step
INSPECT EXHAUST CAMSHAFT (TIMING ROTOR) Check the timing rotor of the exhaust camshaft. OK Camshaft timing rotor does not have any cracks or deformation. NG --> See step 12 OK: Go to next step
CHECK VALVE TIMING Check the valve timing See step 5 . NG --> See step 14 OK: Go to next step
REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT) Replace the camshaft position sensor. Refer to «REMOVAL»(ref-394781-S00494618902011040800000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0365, P0367 OR P0368) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394618-S22943830982011040800000) . Start the engine and allow the engine to idle for 10 seconds or more. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0365, P0367 or P0368 is output A DTC is not output B HINT: If the engine does not start, replace the ECM. B --> REPAIR COMPLETED A --> See step 13
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for exhaust camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B56-3 (VC2) - B58-98 (VCE1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B56-3 (VC2) or B58-98 (VCE1) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for exhaust camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394618-S20895286482011040800000)
SECURELY REINSTALL SENSOR. Refer to «INSPECTION»(ref-394781-S15019831492011040800000)
REPLACE EXHAUST CAMSHAFT. Refer to «REMOVAL»(ref-394763-S21778950132011040800000)
REPLACE ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000)
ADJUST VALVE TIMING. Refer to «DISASSEMBLY»(ref-394763-S33447427362011040800000)

CONDITIONING FOR SENSOR TESTING

HINT

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the air fuel ratio sensor and heated oxygen sensor. This is to activate the sensors sufficiently to obtain the appropriate inspection results.

Scheme 258

Scheme 258: CONDITIONING FOR SENSOR TESTING

(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up with all the accessories switched off until the engine coolant temperature stabilizes.
(c) Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes.
(d) While running the engine at 3000 rpm for 2 seconds and 2000 rpm for 2 seconds, check the waveforms of the air fuel ratio and heated oxygen sensors using the Techstream.

HINT

If either voltage output of the air fuel ratio or heated oxygen sensor does not fluctuate, or there is noise in the waveform of either sensor, the sensor may be malfunctioning.
If the voltage outputs of both the sensors remain lean or rich, the air fuel ratio may be extremely lean or rich. In such cases, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
If the three-way catalytic converter has deteriorated, the heated oxygen sensor (located behind the three-way catalytic converter) voltage output fluctuates up and down frequently, even under normal driving conditions (active air fuel ratio control is not performed).

Scheme 259

HINT

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1 S1 and O2S B1 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.

Techstream Display (Sensor)	Injection Volume	Status	Voltage
AFS Voltage B1 S1 (Air fuel ratio)	+25%	Rich	Below 3.1 V
AFS Voltage B1 S1 (Air fuel ratio)	12.5%	Lean	Higher than 3.4 V
O2S B1 S2 (Heated oxygen)	+25%	Rich	Higher than 0.55 V
O2S B1 S2 (Heated oxygen)	12.5%	Lean	Below 0.4 V

Note. 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.

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.
To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / All Data / AFS Voltage B1 S1 and O2S B1 S2; and then press the graph button on the Data List view.

HINT

DTC SUMMARY

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P043E	Reference orifice clogged	P043E, P043F, P2401, P2402 and P2419 stored when one of following conditions met during key-off EVAP monitor: Reference orifice clogged Reference orifice high-flow Leak detection pump OFF malfunction Leak detection pump ON malfunction Vent valve ON (closed) malfunction	Canister pump module (Reference orifice, leak detection pump, vent valve) Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	While ignition switch off	2 trip
P043F	Reference orifice high-flow
P2401	Leak detection pump stuck OFF
P2402	Leak detection pump stuck ON
P2419	Vent valve stuck closed

HINT

The reference orifice is located inside the canister pump module.

Refer to EVAP System. Refer to INSPECTION PROCEDURE .

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P0441	Purge VSV (Vacuum Switching Valve) stuck open	Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than [second reference pressure x 0.22], ECM determines that purge VSV stuck open.	Purge VSV Connector/wire harness (Purge VSV - ECM) ECM Canister pump module Leak from EVAP system	While ignition switch off	2 trip
	Purge VSV stuck closed	After EVAP leak check performed, purge VSV turned ON (open), and atmospheric air introduced into EVAP system. Reference pressure measured at start and at end of check. If pressure does not return to near atmospheric pressure, ECM determines that purge VSV stuck closed.	Purge VSV Connector/wire harness (Purge VSV - ECM) ECM Canister pump module Leak from EVAP system	While ignition switch off	2 trip
	Purge flow	While engine running, following conditions successively met: Negative pressure not created in EVAP system when purge VSV turned ON (open) EVAP system pressure change less than 0.4 kPa (3.0 mmHg) when vent valve turned ON (closed) Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa (0.75 mmHg)	Purge VSV Connector/wire harness (Purge VSV - ECM) Leak from EVAP line (Purge VSV - Intake manifold) ECM	While engine running	2 trip

Refer to EVAP System. Refer to INSPECTION PROCEDURE .

HINT

Unit expressions

[kPa-a (mmHg-a)] denotes the absolute pressure.
On the Techstream, convert the unit of measurement according to the inspection procedure.

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P0451	Canister pressure sensor noise	Sensor output voltage fluctuates frequently within certain time period.	Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	EVAP monitoring (ignition switch off) Engine running	2 trip
P0451	Canister pressure sensor signal becomes fixed/flat	Sensor output voltage does not vary within certain time period.	Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	EVAP monitoring (ignition switch off)	2 trip
P0452	Canister pressure sensor low input	EVAP pressure below 42.110 kPa-a (315.825 mmHg-a) for 0.5 seconds.	Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	Ignition switch ON EVAP monitoring (ignition switch off)	1 trip
P0453	Canister pressure sensor high input	EVAP pressure higher than 123.761 kPa-a (928.2075 mmHg-a) for 0.5 seconds.	Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	Ignition switch ON EVAP monitoring (ignition switch off)	1 trip

HINT

The canister pressure sensor is built into the canister pump module.

Note. When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel cap. Do not disassemble the canister pump module. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

Scheme 260

Scheme 260: PROCEDURE

CONFIRM DTC AND EVAP PRESSURE Connect the Techstream to the DLC3. Turn the ignition switch to ON (do not start the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Enter the following menus: Powertrain / Engine / Data List / All Data / Vapor Pressure Pump. Read the EVAP (Evaporative Emission) pressure displayed on the Techstream. Result Display (DTC Output) Test Result Suspected Trouble Area Proceed to P0451 - Canister pressure sensor C P0452 Below 45 kPa-a (337.5 mmHg-a) Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor ECM A P0453 Higher than 120 kPa-a (900 mmHg-a) Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor ECM B C --> See step 4 B --> See step 5 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the ignition switch off. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Result Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to B58-114 (PPMP) - Body ground Always 10 ohms or less Wire harness/connector (ECM - Canister pressure sensor) Short in canister pressure sensor circuit A 10 kohms or higher Wire harness/connector (ECM - Canister pressure sensor) Short in ECM circuit B Reconnect the ECM connector. B --> See step 8 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Result Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to B58-114 (PPMP) - Body ground Always 10 kohms or higher Short in canister pressure sensor circuit A 10 ohms or less Short in wire harness/connector (ECM - Canister pressure sensor) B Reconnect the canister pump module connector. Reconnect the ECM connector. B --> See step 7 A --> See step 6
GO TO EVAP SYSTEM. Refer to «EVAP System»(ref-394778-S10635549822011040800000)
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the canister pump module connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition L13-4 (VCC) - Body ground Ignition switch ON 4.5 to 5.5 V L13-3 (VOUT) - Body ground Ignition switch ON 4.5 to 5.5 V Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L13-2 (SGND) - Body ground Always 100 ohms or less Result Test Result Suspected Trouble Area Proceed to Voltage and resistance within standard ranges Open in canister pressure sensor circuit A Voltage and resistance outside standard ranges Open in wire harness/connector (ECM - Canister pressure sensor) B Reconnect the canister pump module connector. B --> See step 7 A: Go to next step
REPLACE CHARCOAL CANISTER ASSEMBLY Replace the canister. Refer to «REMOVAL»(ref-394773-S40470060312011040800000) . NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Air Inlet Port *3 Vent Hose *4 Inspection Area (Check for Disconnection and/or Cracks) NEXT --> See step 9
REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) HINT: If the exhaust tailpipe has been removed, go to the next step before reinstalling it. NEXT --> See step 9
REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394781-S33405130152011040800000) . NEXT --> See step 9
CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Wait for at least 60 seconds. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. HINT: If no pending DTCs are output to the Techstream, the repair has been successfully completed. NEXT --> REPAIR COMPLETED

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P0455	EVAP gross leak	Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than [second reference pressure x 0.22], ECM determines that EVAP system has large leak.	Fuel cap (loose) Leak from EVAP line (Canister - Fuel tank) Leak from EVAP line (Purge VSV - Canister) Canister pump module Leak from fuel tank Leak from canister	While ignition switch off	2 trip
P0456	EVAP small leak	Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure between second reference pressure and [second reference pressure x 0.22], ECM determines that EVAP system has small leak.	Fuel cap (loose) Leak from EVAP line (Canister - Fuel tank) Leak from EVAP line (Purge VSV - Canister) Canister pump module Leak from fuel tank Leak from canister	While ignition switch off	2 trip

Refer to EVAP System. Refer to INSPECTION PROCEDURE .

HINT

Unit expressions

[kPa-a (mmHg-a)] denotes the absolute pressure.
On the Techstream, convert the unit of measurement according to the inspection procedure.

Engine Control (1AR-FE) (Diagnostic Codes (P0010-P0455): Diagnosis Toyota Venza I

INSPECTION PROCEDURE

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CONDITIONING FOR SENSOR TESTING

Scheme 258

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DTC SUMMARY

Scheme 260

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