Engine Control System (2GR-FE) (Diagnostic Codes (P0010-P0340) & Circuit Tests): Diagnosis Toyota Highlander II рестайлинг

INSPECTION PROCEDURE

HINT

1. If DTC P0010 is displayed, check the intake camshaft circuit for the right bank VVT system.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. If DTC P0020 is displayed, check the intake camshaft circuit for the left bank VVT system.
5. 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 629

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OIL CONTROL VALVE FOR INTAKE CAMSHAFT) Connect the Techstream to the DLC3. Start the engine and turn the tester on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1) or Control the VVT Linear (Bank 2). Check the engine speed while operating the oil control valve using the tester. OK Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 2 OK --> See step 5
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Disconnect the intake camshaft timing oil control valve connector. 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 Reconnect the camshaft timing oil control valve connector. NG --> See step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE - ECM) Disconnect the intake camshaft timing camshaft oil control valve connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Bank 1 Bank 2 Tester Connection Condition Specified Condition B50-19 (OC1+) - B24-1 Always Below 1 ohms B50-20 (OC1-) - B24-2 Always Below 1 ohms Tester Connection Condition Specified Condition B51-19 (OC2+) - B25-1 Always Below 1 ohms B51-20 (OC2-) - B25-2 Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition B50-19 (OC1+) or B24-1 - Body ground Always 10 kohms or higher B50-20 (OC1-) or B24-2 - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B51-19 (OC2+) or B25-1 - Body ground Always 10 kohms or higher B51-20 (OC2-) or B25-2 - Body ground Always 10 kohms or higher Reconnect the camshaft timing oil control valve connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE - ECM) OK --> See step 4
4. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)
6. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-422482-S05437947002011092600000)

HINT

1. If DTC P0011 or P0012 is displayed, check the bank 1 VVT system circuit.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. If DTC P0021 or P0022 is displayed, check the bank 2 VVT system circuit.
5. 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 630

Scheme 631

Scheme 632

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P0011, P0012, P0021 or P0022 A P0011, P0012, P0021 or P0022 and other DTCs B HINT: If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OIL CONTROL VALVE FOR INTAKE CAMSHAFT) Connect the Techstream to the DLC3. Start the engine and turn the tester on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1) or Control the VVT Linear (Bank 2). Check the engine speed while operating the oil control valve using the tester. OK Tester Operation Specified Condition 0% Normal engine idle speed 100% Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . 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 DTCs using the tester. OK No pending DTC output. NG --> See step 4 OK --> SYSTEM IS OK
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Remove the cylinder head covers RH and LH. Turn the crankshaft to align the timing marks of the crankshaft. Align the notch of the crankshaft pulley to the "0" position. Check if the timing marks of the camshaft pulley and camshaft bearing cap align. Turn the crankshaft clockwise by 360° if the timing marks do not align. Check if they align once again. OK The timing marks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position. TEXT IN ILLUSTRATION *1 Timing Mark NG --> See step 10 OK: Go to next step
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the intake camshaft timing oil control valve. 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 Apply the positive battery voltage to terminal 1 and the negative battery voltage to terminal 2. Check the valve operation. OK Valve moves quickly. TEXT IN ILLUSTRATION *1 Valve Moves Reinstall the camshaft timing oil control valve. NG --> See step 11 OK: Go to next step
6. CHECK OIL PIPE AND OIL CONTROL VALVE FILTER Remove the oil pipe No. 1 or oil pipe assembly. Remove the oil control valve filter. Check that the filter and pipe are not clogged. OK The filter and pipe are not clogged. TEXT IN ILLUSTRATION *1 RH Bank *2 LH Bank NG --> REPLACE OIL CONTROL VALVE FILTER OR PIPE OK: Go to next step
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . 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. OK No pending DTC output. HINT: DTC P0011, P0012, P0021 or P0022 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay output even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. NG --> See step 12 OK --> SYSTEM IS OK
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422300-S11996203412011092600000)
10. ADJUST VALVE TIMING. Refer to «REASSEMBLY»(ref-422437-S17584641942011092600000)
11. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-422482-S05437947002011092600000)
12. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)

HINT

1. If DTC P0013 is displayed, check the exhaust camshaft circuit for the bank 1 VVT system.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. If DTC P0023 is displayed, check the exhaust camshaft circuit for the bank 2 VVT system.
5. 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.

HINT

1. If DTC P0014 or P0015 is displayed, check the bank 1 VVT system circuit.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. If DTC P0024 or P0025 is displayed, check the bank 2 VVT system circuit.
5. 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 633

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025) Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P0014, P0015, P0024 or P0025 A P0014, P0015, P0024 or P0025 and other DTCs B HINT: If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OIL CONTROL VALVE FOR EXHAUST CAMSHAFT) Connect the Techstream to the DLC3. Start the engine and turn the tester on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2). Check the engine speed while operating the oil control valve using the tester. OK Tester Operation Specified Condition 0% (OFF) Normal engine idle speed 127% (ON) Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025) Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . 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 DTCs using the tester. OK No pending DTC output. NG --> See step 4 OK --> SYSTEM IS OK
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMP TEETH ON TIMING CHAIN) Remove the cylinder head covers RH and LH. Turn the crankshaft to align the matchmarks of the crankshaft. Align the notch of the crankshaft pulley to the "0" position. Check if the matchmarks of the camshaft pulley and camshaft bearing cap align. TEXT IN ILLUSTRATION *1 Timing Mark Turn the crankshaft clockwise by 360° if the matchmarks do not align. Check if they align once again. OK The matchmarks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position. NG --> See step 10 OK: Go to next step
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) Remove the exhaust camshaft timing oil control valve. 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 Apply the positive battery voltage to terminal 1 and the negative battery voltage to terminal 2. Check the valve operation. OK Valve moves quickly. TEXT IN ILLUSTRATION *1 Valve Moves Reinstall the camshaft timing oil control valve. NG --> See step 11 OK: Go to next step
6. CHECK OIL PIPE AND OIL CONTROL VALVE FILTER Remove the oil pipe No. 1 or oil pipe assembly. Remove the oil control valve filter. Check that the filter and pipe are not clogged. TEXT IN ILLUSTRATION *1 RH Bank *2 LH Bank OK The filter and pipe are not clogged. NG --> REPLACE OIL CONTROL VALVE FILTER OR PIPE OK: Go to next step
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . 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. Confirm that no DTC is set using the tester. OK No pending DTC output. HINT: DTC P0014, P0015, P0024 or P0025 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. NG --> See step 12 OK --> SYSTEM IS OK
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422300-S11996203412011092600000)
10. ADJUST VALVE TIMING. Refer to «REASSEMBLY»(ref-422437-S17584641942011092600000)
11. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-422482-S05437947002011092600000)
12. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)

HINT

1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
3. 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.

HINT

1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
3. 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.

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

HINT

1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
3. 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 634

Scheme 635

1. 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 Bank 1 Bank 2 Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher Tester Connection Condition Specified Condition 1 (HA2A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 ohms 1 (HA2A) - 4 (A2A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Component without harness connected (Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 5 OK: Go to next step
2. CHECK TERMINAL VOLTAGE (+B OF AIR FUEL RATIO SENSOR) Disconnect the air fuel ratio sensor connector. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Bank 1 Bank 2 Tester Connection Switch Condition Specified Condition B20-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V Tester Connection Switch Condition Specified Condition B19-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Front view of wire harness connector (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (A/F RELAY - AIR FUEL RATIO SENSOR) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR RELAY - 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) Bank 1 Bank 2 Tester Connection Condition Specified Condition B20-1 (HA1A) - B48-17 (HA1A) Always Below 1 ohms Tester Connection Condition Specified Condition B19-1 (HA2A) - B48-19 (HA2A) Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition B20-1 (HA1A) or B48-17 (HA1A) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B19-1 (HA2A) or B48-19 (HA2A) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - ECM) OK: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to No output A P0031, P0032, P0051, P0052, P101D and/or P103D B B --> See step 6 A --> See step 7
5. REPLACE AIR FUEL RATIO SENSOR. Refer to «COMPONENTS»(ref-422482-S35756680872011092600000)
6. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)

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

HINT

1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
3. If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
4. 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 636

Scheme 637

1. 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 Bank 1 Bank 2 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 Tester Connection Condition Specified Condition 1 (HT2B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT2B) - 4 (E2) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 5 OK: Go to next step
2. CHECK TERMINAL VOLTAGE (+B TERMINAL OF HEATED OXYGEN SENSOR) Disconnect the heated oxygen sensor connector. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Bank 1 Bank 2 Tester Connection Switch Condition Specified Condition P1-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V Tester Connection Switch Condition Specified Condition B39-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Front view of wire harness connector (to Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI RELAY - HEATED OXYGEN SENSOR) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connectors. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Bank 1 Bank 2 Tester Connection Condition Specified Condition P1-1 (HT1B) - B48-12 (HT1B) Always Below 1 ohms Tester Connection Condition Specified Condition B39-1 (HT2B) - B48-13 (HT2B) Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition P1-1 (HT1B) or B48-12 (HT1B) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B39-1 (HT2B) or B48-13 (HT2B) - Body ground Always 10 kohms or higher Reconnect the ECM connectors. Reconnect the heated oxygen sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) OK: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Start the engine. Drive the vehicle accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to No output A P0037, P0038, P0057, P0058, P0141 and/or P0161 B B --> See step 6 A --> See step 7
5. REPLACE HEATED OXYGEN SENSOR. Refer to «COMPONENTS»(ref-422482-S39247814522011092600000)
6. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)

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 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.

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 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 638

Scheme 639

1. READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / 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
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE) Disconnect the mass air flow meter connector. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B10-3 (+B) - Body ground Ignition switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a 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 (MASS AIR FLOW METER - EFI MAIN RELAY) OK: Go to next step
3. 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 B10-5 (VG) - B50-14 (VG) Always Below 1 ohms B10-4 (E2G) - B50-13 (E2G) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B10-5 (VG) or B50-14 (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 (MASS AIR FLOW METER - ECM) OK: Go to next step
4. INSPECT MASS AIR FLOW METER Perform On-vehicle Inspection, refer to «ON-VEHICLE INSPECTION»(ref-422482-S03558825682011092600000) . Inspect the function of the mass air flow meter. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / MAF. Start the engine. Check that the reading of the mass air flow meter changes when the engine is raced. OK The reading changes. NG --> See step 8 OK --> See step 7
5. 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 B10-4 (E2G) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a 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 8
6. 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 B10-4 (E2G) - B50-13 (E2G) 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 7
7. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
8. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-422482-S26153776752011092600000)

Scheme 640

1. 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 becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes see scheme 1
2. The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.
3. 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.

HINT

1. If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
2. 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 641

Scheme 642

1. READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Intake Air. Read the value displayed on the tester. Standard Same as actual intake air temperature. Result Temperature Displayed Proceed to -40°C (-40°F) A 140°C (284°F) 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). B --> See step 4 C --> See step 7 A: Go to next step
2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Disconnect the mass air flow meter connector. Connect terminals THA and E2 of the mass air flow meter wire harness side connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Intake Air. Read the value displayed on the tester. Standard 140°C (284°F) TEXT IN ILLUSTRATION *1 Mass Air Flow Meter *2 ECM *a Front view of wire harness connector (to Mass Air Flow Meter) Reconnect the mass air flow meter connector. NG --> See step 3 OK --> See step 8
3. 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 Check for short Tester Connection Condition Specified Condition B50-15 (THA) - B10-1 (THA) Always Below 1 ohms B50-7 (ETHA) - B10-2 (E2) Always Below 1 ohms Tester Connection Condition Specified Condition B50-15 (THA) or B10-1 (THA) - Body ground Always 10 kohms or higher B50-7 (ETHA) or B10-2 (E2) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> See step 9 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
4. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the mass air flow meter connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Intake Air. Read the value displayed on the tester. Standard -40°C (-40°F) TEXT IN ILLUSTRATION *1 Mass Air Flow Meter *2 ECM Reconnect the mass air flow meter connector. NG --> See step 5 OK --> See step 10
5. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Intake Air. Read the value displayed on the tester. Standard -40°C (-40°F) Reconnect the mass air flow meter connector. NG --> See step 6 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
6. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)
8. REPLACE MASS AIR FLOW METER. Refer to «COMPONENTS»(ref-422482-S13956229462011092600000)
9. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
10. REPLACE MASS AIR FLOW METER. Refer to «COMPONENTS»(ref-422482-S13956229462011092600000)

HINT

1. If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
2. 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 643

Scheme 644

1. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the tester. Standard Between 75°C and 97°C (167°F and 207°F) with warm engine. Result Temperature Displayed Proceed to -40°C (-40°F) A 140°C (284°F) B Between 75°C and 97°C (167°F and 207°F) 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). B --> See step 4 C --> See step 8 A: Go to next step
2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) 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 on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the tester. Standard 140°C (284°F) TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM *a Front view of wire harness connector (to Engine Coolant Temperature Sensor) Reconnect the engine coolant temperature sensor connector. NG --> See step 3 OK --> See step 9
3. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Confirm and connection at the engine coolant temperature sensor. Disconnect the engine coolant temperature sensor connector. Connect terminals THW and ETHW of the ECM connector. HINT: Before checking, do visual and contact pressure checks on the ECM connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the tester. Standard 140°C (284°F) Reconnect the engine coolant temperature sensor connector. NG --> See step 7 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
4. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the engine coolant temperature sensor connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the tester. Standard -40°C (-40°F) TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM Reconnect the engine coolant temperature sensor connector. NG --> See step 5 OK --> See step 10
5. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the tester. Standard -40°C (-40°F) Reconnect the engine coolant temperature sensor connector. NG --> See step 6 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
6. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
7. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
8. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)
9. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «COMPONENTS»(ref-422482-S02672525312011092600000)
10. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «COMPONENTS»(ref-422482-S02672525312011092600000)

HINT

1. If any of DTC P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
2. 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.

HINT

1. If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
2. 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.

HINT

1. If any of DTCs P0115, P0116, P0117 or P0118 are set simultaneously with DTC P0125, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
2. 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.

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 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.

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

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.

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the tester on.
4. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds.
5. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F sensor.
6. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume.)
7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1 S1 or AFS Voltage B2 S1 and O2S B1 S2 or O2S B2 S2) displayed on the tester.

HINT

1. The Control the Injection Volume for air fuel ratio sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
2. Each sensor reacts in accordance with increases and decreases in the fuel injection volume.

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 (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

Scheme 645

Scheme 646

Scheme 647

1. Following the Control the Injection Volume for A/F sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
2. To display the graph, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1 S1 or AFS Voltage B2 S1 and O2S B1 S2 or O2S B2 S2 then press the graph button on the Data List view.
3. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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.
2. If the OX1B or OX2B wire from the ECM connector is short-circuited to the +B wire, DTC P0136 or P0156 may be set.

Scheme 648

Scheme 649

1. READ DTC OUTPUT (DTC P0136, P0137, P0138, P0156, P0157 OR P0158) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0138 or P0158 A P0137 or P0157 B P0136 or P0156 C P0139 or P0159 D P0136, P0137, P138, P0156, P0157 or P0158 and other DTCs are output E B --> See step 6 C --> See step 4 D --> See step 15 E --> GO TO DTC CHART A: Go to next step
2. 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 Bank 1 Bank 2 Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX2B) TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 19 OK: Go to next step
3. 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 Bank 1 Bank 2 Tester Connection Condition Specified Condition B48-12 (HT1B) - B51-2 (OX1B) Always 10 kohms or higher Tester Connection Condition Specified Condition B48-13 (HT2B) - B51-4 (OX2B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 20
4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Warm up the engine. 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 air fuel ratio and heated oxygen sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 0.1% or 0.2% graduations within the range. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Standard Voltage Fluctuates between 0.4 V or less and 0.55 V or more. NG --> See step 6 OK: Go to next step
5. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Start the engine and warm it up. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the tester, and monitor the voltage output of air fuel ratio and heated oxygen sensors displayed on the tester. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The air fuel ratio sensor is displayed as AFS Voltage B1 S1 or AFS Voltage B2 S1, and the heated oxygen sensor is displayed as O2S B1 S2 or O2S B2 S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of a approximately 20 seconds. Result Tester Display Voltage Variation Proceed to AFS Voltage B1 S1 or AFS Voltage B2 S1 (Air fuel ratio sensor) Alternates between more and less than 3.3 V OK Remains at more than 3.3 V NG Remains at less than 3.3 V NG HINT: A normal heated oxygen sensor voltage (O2S B1 S2 or O2S B2 S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 12 OK --> CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO
6. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes. OK No gas leak. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
7. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 19 OK: Go to next step
8. 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) Bank 1 Bank 2 Tester Connection Condition Specified Condition P1-1 (HT1B) - B48-12 (HT1B) Always Below 1 ohms P1-3 (OX1B) - B51-2 (OX1B) P1-4 (E2) - B51-1 (EX1B) Tester Connection Condition Specified Condition B39-1 (HT2B) - B48-13 (HT2B) Always Below 1 ohms B39-3 (OX2B) - B51-4 (OX2B) B39-4 (E2) - B51-3 (EX2B) Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition P1-1 (HT1B) or B48-12 (HT1B) - Body ground Always 10 kohms or higher P1-3 (OX1B) or B51-12 (OX1B) - Body ground Tester Connection Condition Specified Condition B39-1 (HT2B) or B48-13 (HT2B) - Body ground Always 10 kohms or higher B39-3 (OX2B) or B51-4 (OX2B) - Body ground Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor, refer to «COMPONENTS»(ref-422482-S39247814522011092600000) . NEXT: Go to next step
10. PERFORM CONFIRMATION DRIVING PATTERN HINT: Refer to the CONFIRMATION DRIVING PATTERN for P0136, P0137, P0138, P0156, P0157 or P0158. NEXT: Go to next step
11. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0136, P0137, P0138, P0156, P0157 and P0158. Check the DTC MONITOR is NORMAL. If DTC MONITOR is INCOMPLETE, perform the drive pattern increasing the vehicle speed and using the second gear to decelerate the vehicle. Result Result Proceed to ABNORMAL (DTC P0136, P0137, P0138, P0156, P0157 or P0158 is output) A NORMAL (DTC is not output) B B --> END A --> See step 21
12. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor, refer to «COMPONENTS»(ref-422482-S35756680872011092600000) . NEXT: Go to next step
13. PERFORM CONFIRMATION DRIVING PATTERN HINT: Refer to the CONFIRMATION DRIVING PATTERN for P0136, P0137, P0138, P0156, P0157 or P0158. NEXT: Go to next step
14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0136, P0137, P0138, P0156, P0157 and P0158. Check the DTC MONITOR is NORMAL. If DTC MONITOR is INCOMPLETE, perform the drive pattern increasing the vehicle speed and using the second gear to decelerate the vehicle. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P0136, P0137, P0138, P0156, P0157 or P0158 is output) B B --> See step 19 A --> END
15. CHECK FOR EXHAUST GAS LEAK Inspect for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes. OK No gas leakage. B --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT A: Go to next step
16. INSPECT HEATED OXYGEN SENSOR (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 Bank 1 Bank 2 Tester Connection Condition Specified Condition B48-12 (HT1B) - B51-2 (OX1B) Always 10 kohms or higher Tester Connection Condition Specified Condition B48-13 (HT2B) - B51-4 (OX2B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
17. PERFORM CONFIRMATION DRIVING PATTERN Perform the Confirmation Driving Pattern (P0139). NEXT: Go to next step
18. READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0139 and P0159. Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed. Result Result Proceed to ABNORMAL (DTC P0139 or P0159 is output) A NORMAL (DTC is not output) B B --> CHECK FOR INTERMITTENT PROBLEMS A --> See step 19
19. REPLACE HEATED OXYGEN SENSOR. Refer to «COMPONENTS»(ref-422482-S39247814522011092600000)
20. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
21. REPLACE AIR FUEL RATIO SENSOR. Refer to «COMPONENTS»(ref-422482-S35756680872011092600000)

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.

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
6. Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume.)
7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

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

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 (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich)

Scheme 650

1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
2. To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2; and then press the graph button on the Data List view.
3. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.

HINT

1. 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.
2. 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.
3. 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.

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

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.

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the tester on.
4. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds.
5. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F sensor.
6. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume.)
7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1 S1 or AFS Voltage B2 S1 and O2S B1 S2 or O2S B2 S2) displayed on the tester.

HINT

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

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 (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

1. Following the Control the Injection Volume for A/F sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
2. To display the graph, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1 S1 or AFS Voltage B2 S1 and O2S B1 S2 or O2S B2 S2; then press the graph button on the Data List view.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. 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.
5. 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.

Scheme 651

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171, P0172, P0174 OR P0175) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0171, P0172, P0174 or P0175 A P0171, P0172, P0174 or P0175 and other DTCs B HINT: If any DTCs other than P0171, P0172, P0174 or P0175 are output, troubleshoot those DTCs first. B --> See step 23 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. OK PCV hose is connected correctly and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leak, refer to «ON-VEHICLE INSPECTION»(ref-422486-S05660636552011092600000) . OK No leak from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM (AIR FUEL RATIO CONTROL) Connect the Techstream to the DLC3. Start the engine. Turn the tester on. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the air fuel ratio sensor and the heated oxygen sensor (AFS Voltage B1 S1 or AFS Voltage B2 S1 and O2S B1 S2 or O2S B2 S2) displayed on the tester. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard Tester Display Injection Volume Status Voltage AFS Voltage B1 S1 AFS Voltage B2 S1 (Air fuel ratio sensor) +25% Rich Less than 3.1 V -12.5% Lean More than 3.4 V O2S B1 S2 O2S B2 S2 (Heated oxygen) +25% Rich More than 0.55 V -12.5% Lean Less than 0.4 V RESULT Status AFS B1 S1 AFS B2 S1 Status O2S B1 S2 O2S B2 S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition Misfire Suspected Trouble Area Proceed to Lean/Rich Lean/Rich Normal - - A Lean Lean Actual air fuel ratio lean May occur PCV valve and hose PCV hose connections Injector blockage Gas leak from exhaust system Air induction system Fuel pressure Mass air flow meter Engine coolant temperature sensor A Rich Rich Actual air fuel ratio rich - Injector blockage or blockage Gas leak from exhaust system Ignition system Fuel pressure Mass air flow meter Engine coolant temperature sensor Lean Lean/Rich Air fuel ratio sensor malfunction - Air fuel ratio sensor B Rich Lean/Rich Air fuel ratio sensor malfunction - Air fuel ratio sensor Lean: During Control the Injection Volume for A/F Sensor, the air fuel ratio sensor output voltage (AFS) is consistently more than 3.4 V, and the heated oxygen sensor output voltage (O2S) is consistently less than 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS is consistently less than 3.1 V, and the O2S is consistently more than 0.55 V. Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the heated oxygen sensor alternates correctly. B --> See step 11 A: Go to next step
5. READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp. Read the Data List twice, when the engine is both cold and warmed up. Standard value With cold engine: Same as ambient air temperature. With warm engine: 80 to 100°C (176 to 212°F). NG --> See step 24 OK: Go to next step
6. INSPECT MASS AIR FLOW METER Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000RPM. Standard Between 10 to 25 g/sec. (shift lever: N; A/C: off). NG --> See step 16 OK: Go to next step
7. CHECK FUEL PRESSURE Check the fuel pressure, refer to «ON-VEHICLE INSPECTION»(ref-422479-S13441752352011092600000) . NG --> REPAIR OR REPLACE FUEL SYSTEM OK: Go to next step
8. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipe. OK No gas leak. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
9. CHECK SPARK AND IGNITION HINT: Refer to the ignition system inspection procedure, refer to «ON-VEHICLE INSPECTION»(ref-422439-S09243371002011092600000) . If the spark plugs or ignition system malfunctions, engine misfire may occur. The misfire count can be read using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Cylinder #1 Misfire Rate (to Cylinder #6 Misfire Rate) NG --> REPAIR OR REPLACE IGNITION SYSTEM OK: Go to next step
10. INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME) HINT: Refer to the fuel injector inspection procedure, refer to «INSPECTION»(ref-422481-S02899962322011092600000) . If the injectors malfunction, engine misfire may occur. The misfire count can be read using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Cylinder #1 Misfire Rate (to Cylinder #6 Misfire Rate). OK --> See step 15 NG --> See step 25
11. 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 Bank 1 Bank 2 Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher Tester Connection Condition Specified Condition 1 (HA2A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 ohms 1 (HA2A) - 4 (A2A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Component without harness connected (Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 26 OK: Go to next step
12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR) Disconnect the air fuel ratio sensor connector. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Bank 1 Bank 2 Tester Connection Switch Condition Specified Condition B20-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V Tester Connection Switch Condition Specified Condition B19-2 (+B) - Body ground Ignition switch on (IG) 9 to 14 V TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Front view of wire harness connector (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 21 OK: Go to next step
13. 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) Bank 1 Bank 2 Tester Connection Condition Specified Condition B20-1 (HA1A) - B48-17 (HA1A) Always Below 1 ohms Tester Connection Condition Specified Condition B19-1 (HA2A) - B48-19 (HA2A) Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition B20-1 (HA1A) or B48-17 (HA1A) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B19-1 (HA2A) or B48-19 (HA2A) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
14. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor, refer to «COMPONENTS»(ref-422482-S35756680872011092600000) . NEXT: Go to next step
15. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Clear DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Turn the ignition switch off. Turn the ignition switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes. Read DTCs. Result Result Proceed to DTC P0171, P0172, P0174 or P0175 is output A DTC is not output B B --> END A: Go to next step
16. CHECK HARNESS AND CONNECTOR Check the connection and terminal contact pressure of connectors and wire harness between the mass air flow meter and ECM See step 5 . HINT: Repair any problems. NEXT: Go to next step
17. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Turn the ignition switch off. Turn the ignition switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to DTC P0171, P0172, P0174 or P0175 is output A DTC is not output B B --> END A: Go to next step
18. 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 Tester Connection Condition Specified Condition B10-5 (VG) - B50-14 (VG) Always Below 1 ohms B10-4 (E2G) - B50-13 (E2G) Always Below 1 ohms B10-5 (VG) or B50-14 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
19. REPLACE MASS AIR FLOW METER ASSEMBLY Replace the mass air flow meter assembly, refer to «REMOVAL»(ref-422482-S26153776752011092600000) . HINT: If the result of the inspection performed step 6 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly. NEXT: Go to next step
20. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Turn the ignition switch off. Turn the ignition switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to DTC is not output A DTC P0171, P0172, P0174 or P0175 is output B B --> See step 27 A --> END
21. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
22. INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (A/F RELAY) Inspect the A/F relay, refer to «INSPECTION»(ref-422482-S04976773552011092600000) . NG --> See step 28 OK --> CHECK ECM POWER SOURCE CIRCUIT
23. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422300-S11996203412011092600000)
24. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «COMPONENTS»(ref-422482-S02672525312011092600000)
25. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «COMPONENTS»(ref-422481-S19451899152011092600000)
26. REPLACE AIR FUEL RATIO SENSOR. Refer to «COMPONENTS»(ref-422482-S35756680872011092600000)
27. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
28. REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY (A/F RELAY). Refer to «COMPONENTS»(ref-422482-S36016698302011092600000)

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

Scheme 652

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Active Test / Active the Fuel Pump Speed Control. Check the operation of the relay while operating it using the tester. OK Operating noise can be heard from the relay. NG --> See step 2 OK --> See step 4
2. INSPECT RELAY (FUEL PMP RELAY) Remove the FUEL PMP relay from the engine room junction block. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 Always Approximately 111 ohms Reinstall the FUEL PMP relay. NG --> REPLACE RELAY (FUEL PMP RELAY) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - ECM) Remove the FUEL PMP relay from the engine room relay block. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition FUEL PMP relay terminal 1 - D60-8 (FPR) Always Below 1 ohms FUEL PMP relay terminal 1 or D60-8 (FPR) - Body Ground Always 10 kohms or higher Reconnect the ECM connector. Reinstall the FUEL PMP relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PMP RELAY - ECM) OK --> See step 4
4. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)

Scheme 653

When the engine misfires, high concentrations of hydrocarbons enter the exhaust gas. High hydrocarbons concentration levels can cause increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also cause increases in the three-way catalytic converter temperature, which may cause damage to the three-way catalytic converter. To prevent this increase in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire rate. When the temperature of the three-way catalytic converter reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the VVT sensor and the crankshaft position sensor. The VVT sensor is used to identify any misfiring cylinders and the crankshaft position sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire count exceeds the threshold levels, the ECM illuminates the MIL and sets a DTC.

When multiple DTCs for misfiring cylinders are set, but DTC P0300 is not set, it indicates that misfires have been detected in different cylinders at different times. DTC P0300 is only set when several misfiring cylinders are detected at the same time.

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

HINT

1. If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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.
5. 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.
6. 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 volume in the tank. Improper fuel is used. The spark plugs have been contaminated.
7. After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #6 Misfire Count).
8. Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving pattern after finishing repairs.
9. For 6 and 8 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at high engine RPM. If misfires occur only in high engine RPM areas, only DTC P0300 is set. In the event of DTC P0300 being present, perform the following operations: Clear the DTC, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Start the engine and conduct the confirmation driving pattern. Read the misfiring rates of each cylinder or DTC(s) using the tester. Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC. After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not set.
10. When one of Short FT #1, Long FT #1, Short FT #2 or Long FT #2 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).
11. When the Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfire have occurred only while warming up the engine.
12. An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

Scheme 654

Scheme 655

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE CODES) Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. HINT: Write down the DTCs. Result Display (DTC Output) Proceed to P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 A P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs B HINT: If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and P0306 are output, troubleshoot those DTCs first. B --> See step 37 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connection. OK PCV hose is correctly connected and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Enter the following menus: Powertrain / Engine and ECT / Data List / 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
4. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Enter the following menus: Powertrain / Engine and ECT / Data List / Catalyst OT MF F/C. Read the value displayed on the tester. Result Data List Tester Display Proceed to Catalyst OT MF F/C Avail A Not Avl B B --> See step 6 A: Go to next step
5. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the tester on. Enter the following menus: Powertrain / Engine and ECT / 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 either idling or being revved within 3000 RPM. NEXT: Go to next step
6. READ VALUE USING TECHSTREAM Enter the following menus: Powertrain / Engine and ECT / Data List / Misfire / Cylinder #1 Misfire Count, #2, #3, #4, #5 and #6 Read each value for Cylinder #1 Misfire Count to #6 displayed on the tester. If no misfire counts occur in any cylinders, perform the following procedures: Start the engine and let it idle. Move the shift lever to the D position. Check the Cylinder #1 Misfire Count to #6. If misfire counts are still not displayed, perform steps (c) and (d). Drive the vehicle with the Misfire RPM and Misfire Load noted in the "READ VALUE OF THE TECHSTREAM Misfire RPM AND Misfire Load)" procedures above. Read the Cylinder #1 Misfire Count to #6 or DTCs displayed on the tester. 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's 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's 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
7. CHECK SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Maximum gap 1.4 mm (0.0551 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO FK20HR11 NOTE: If the electrode gap is larger than standard, replace the spark plug. Do not adjust the electrode gap. NG --> See step 38 OK: Go to next step
8. CHECK FOR SPARKS AND IGNITION Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. 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 the spark. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 34 OK: Go to next step
9. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder, refer to «ON-VEHICLE INSPECTION»(ref-422437-S26793532362011092600000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (INJECTOR OF MISFIRING CYLINDER POWER SOURCE) Disconnect the injector connector (of the misfiring cylinder). Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B13-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 2 B14-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 3 B15-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 4 B16-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 5 B17-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 6 B18-2 - Body ground Ignition switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector) NG --> GO TO FUEL INJECTOR CIRCUIT OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING) Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard resistance Check for open Check for short Cylinder Tester Connection Condition Specified Condition No. 1 B13-1 - B48-6 (#10) Always Below 1 ohms No. 2 B14-1 - B48-1 (#20) Always Below 1 ohms No. 3 B15-1 - B48-7 (#30) Always Below 1 ohms No. 4 B16-1 - B48-2 (#40) Always Below 1 ohms No. 5 B17-1 - B48-8 (#50) Always Below 1 ohms No. 6 B18-1 - B48-3 (#60) Always Below 1 ohms Cylinder Tester Connection Condition Specified Condition No. 1 B13-1 - Body ground Always 10 kohms or higher No. 2 B14-1 - Body ground Always 10 kohms or higher No. 3 B15-1 - Body ground Always 10 kohms or higher No. 4 B16-1 - Body ground Always 10 kohms or higher No. 5 B17-1 - Body ground Always 10 kohms or higher No. 6 B18-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - ECM) OK: Go to next step
12. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance, refer to «INSPECTION»(ref-422481-S02899962322011092600000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor), refer to «INSPECTION»(ref-422481-S02899962322011092600000) . NG --> See step 39 OK: Go to next step
13. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage, refer to «ON-VEHICLE INSPECTION»(ref-422486-S05660636552011092600000) . OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
14. CHECK FUEL PRESSURE Check the fuel pressure, refer to «ON-VEHICLE INSPECTION»(ref-422479-S13441752352011092600000) . NG --> See step 36 OK: Go to next step
15. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 1 NG --> See step 40 OK: Go to next step
16. INSPECT MASS AIR FLOW METER Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000RPM. Standard Between 10 to 25 g/sec. (shift lever: N; A/C: off). NG --> See step 29 OK: Go to next step
17. CHECK VALVE TIMING See step 4 NG --> ADJUST VALVE TIMING OK: Go to next step
18. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage, refer to «ON-VEHICLE INSPECTION»(ref-422486-S05660636552011092600000) . OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
19. CHECK FUEL PRESSURE Check the fuel pressure, refer to «ON-VEHICLE INSPECTION»(ref-422479-S13441752352011092600000) . NG --> See step 36 OK: Go to next step
20. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 1 NG --> See step 40 OK: Go to next step
21. INSPECT MASS AIR FLOW METER Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000RPM. Standard Between 10 to 25 g/sec. (shift lever: N; A/C: off). NG --> See step 29 OK: Go to next step
22. CHECK VALVE TIMING See step 4 NG --> ADJUST VALVE TIMING OK: Go to next step
23. CHECK SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Maximum gap 1.4 mm (0.0551 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO FK20HR11 NOTE: If the electrode gap is larger than standard, replace the spark plug. Do not adjust the electrode gap. NG --> See step 38 OK: Go to next step
24. CHECK FOR SPARKS AND IGNITION Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. 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 the spark. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 34 OK: Go to next step
25. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder, refer to «ON-VEHICLE INSPECTION»(ref-422437-S26793532362011092600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - ECM) OK: Go to next step
26. CHECK HARNESS AND CONNECTOR (INJECTOR OF MISFIRING CYLINDER POWER SOURCE) Disconnect the injector connector (of the misfiring cylinder). Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B13-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 2 B14-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 3 B15-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 4 B16-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 5 B17-2 - Body ground Ignition switch on (IG) 11 to 14 V No. 6 B18-2 - Body ground Ignition switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INJ NO. 2 FUSE - INJECTOR) OK: Go to next step
27. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING) Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard resistance Check for open Check for short Cylinder Tester Connection Condition Specified Condition No. 1 B13-1 - B48-6 (#10) Always Below 1 ohms No. 2 B14-1 - B48-1 (#20) Always Below 1 ohms No. 3 B15-1 - B48-7 (#30) Always Below 1 ohms No. 4 B16-1 - B48-2 (#40) Always Below 1 ohms No. 5 B17-1 - B48-8 (#50) Always Below 1 ohms No. 6 B18-1 - B48-3 (#60) Always Below 1 ohms Cylinder Tester Connection Condition Specified Condition No. 1 B13-1 - Body ground Always 10 kohms or higher No. 2 B14-1 - Body ground Always 10 kohms or higher No. 3 B15-1 - Body ground Always 10 kohms or higher No. 4 B16-1 - Body ground Always 10 kohms or higher No. 5 B17-1 - Body ground Always 10 kohms or higher No. 6 B18-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - ECM) OK: Go to next step
28. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance, refer to «INSPECTION»(ref-422481-S02899962322011092600000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor), refer to «ON-VEHICLE INSPECTION - Step 2»(ref-422479-S20024023842011092600000) . NG --> See step 39 OK --> See step 41
29. CHECK HARNESS AND CONNECTOR Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM See step 3 . HINT: Repair any problems. NEXT: Go to next step
30. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Turn the ignition switch off. Turn the ignition switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306. Check the DTC judgment result. RESULT Display (DTC Output) Proceed to ABNORMAL (P0300, P0301, P0302, P0303, P0304, P0305 or P0306 output) A NORMAL (No DTC output) B B --> END A: Go to next step
31. 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 Tester Connection Condition Specified Condition B10-5 (VG) - B50-14 (VG) Always Below 1 ohms B10-4 (E2G) - B50-13 (E2G) Always Below 1 ohms B10-5 (VG) or B50-14 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
32. REPLACE MASS AIR FLOW METER Replace the mass air flow meter assembly, refer to «REMOVAL»(ref-422482-S26153776752011092600000) . HINT: If the results of the inspections performed in steps 16 and 21 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly. NEXT: Go to next step
33. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the Techstream on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Turn the ignition switch off. Turn the ignition switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306. Check the DTC judgment result. RESULT Display (DTC Output) Proceed to NORMAL (No DTC output) A ABNORMAL (P0300, P0301, P0302, P0303, P0304, P0305 or P0306 output) B B --> See step 41 A --> END
34. CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Change the installed spark plug to a spark plug that functions normally. Perform a spark test. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug to the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 35 OK --> See step 38
35. CHANGE TO NORMAL IGNITION COIL ASSEMBLY AND CHECK SPARK OF MISFIRING CYLINDER Change the ignition coil assembly to an ignition coil assembly that functions normally. Perform a spark test. WARNING: Always disconnect all fuel injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug to the ignition coil and connect the ignition coil connector. Disconnect the fuel injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 41 OK --> See step 42
36. CHECK FUEL LINE Check the fuel lines for leaks or blockage. NG --> REPAIR OR REPLACE FUEL LINE OK --> REPLACE FUEL PUMP
37. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422300-S11996203412011092600000)
38. REPLACE SPARK PLUG. Refer to «COMPONENTS»(ref-422439-S38576253132011092600000)
39. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «COMPONENTS»(ref-422481-S19451899152011092600000)
40. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «COMPONENTS»(ref-422482-S02672525312011092600000)
41. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
42. REPLACE IGNITION COIL ASSEMBLY. Refer to «COMPONENTS»(ref-422439-S38576253132011092600000)

HINT

1. DTCs P0327 and P0328 are for the bank 1 knock sensor circuit.
2. DTCs P0332 and P0333 are for the bank 2 knock sensor circuit.
3. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
5. 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 656

Scheme 657

Scheme 658

1. READ VALUE USING DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT) Disconnect the Bd1 connector. Using lead wires, connect the connectors as follows. Male Connector - Female Connector Terminal 2 - Terminal 4 Terminal 1 - Terminal 3 Terminal 4 - Terminal 2 Terminal 3 - Terminal 1 Warm up the engine. Run the engine at 3000 RPM for 10 seconds or more. Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display Proceed to DTCs that are same as when vehicle brought in P0327, P0328 --> P0327, P0328 or P0332, P0333 --> P0332, P0333 A DTCs that are different from when vehicle brought in P0327, P0328 --> P0332, P0333 or P0332, P0333 --> P0327, P0328 B TEXT IN ILLUSTRATION *1 Knock Sensor *2 ECM *3 Male Connector *4 Female Connector *a Front view of wire harness connector (to Knock Sensor) Reconnect the Bd1 connector. B --> See step 4 A: Go to next step
2. CHECK HARNESS OR CONNECTOR (Bd1 CONNECTOR - ECM) Disconnect the Bd1 connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Check for open Check for short Tester Connection Condition Specified Condition Bd1 female connector 2 - B50-11 (KNK1) Always Below 1 ohms Bd1 female connector 1 - B50-12 (EKNK) Always Below 1 ohms Bd1 female connector 4 - B50-5 (KNK2) Always Below 1 ohms Bd1 female connector 3 - B50-6 (EKN2) Always Below 1 ohms Tester Connection Condition Specified Condition Bd1 female connector 2 or B50-11 (KNK1) - Body ground Always 10 kohms or higher Bd1 female connector 1 or B50-12 (EKNK) - Body ground Always 10 kohms or higher Bd1 female connector 4 or B50-5 (KNK2) - Body ground Always 10 kohms or higher Bd1 female connector 3 or B50-6 (EKN2) - Body ground Always 10 kohms or higher Reconnect the Bd1 connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (Bd1 CONNECTOR - ECM) OK: Go to next step
3. INSPECT ECM Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition B50-11 (KNK1) - B50-12 (EKNK) Ignition switch on (IG) 4.5 to 5.5 V B50-5 (KNK2) - B50-6 (EKN2) Ignition switch on (IG) 4.5 to 5.5 V TEXT IN ILLUSTRATION *a Component with harness connected (ECM) Reconnect the ECM connector. NOTE: Fault may be intermittent. Check the wire harness and connectors carefully and retest. NG --> See step 8 OK --> See step 6
4. INSPECT KNOCK SENSOR Disconnect the Bd1 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition Bd1 male connector 1 - 2 20 °C(68°F) 120 to 280 kohms Bd1 male connector 3 - 4 20 °C(68°F) 120 to 280 kohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Male Connector) Reconnect the Bd1 connector. NG --> See step 5 OK --> See step 6
5. CHECK HARNESS AND CONNECTOR (Ba1 CONNECTOR - KNOCK SENSOR) HINT: If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on the right bank side. If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on the left bank side. Disconnect the Bd1 connector. Disconnect the knock sensor connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Check for open Check for short Tester Connection Condition Specified Condition Bd1 male connector 2 - d2-2 Always Below 1 ohms Bd1 male connector 1 - d2-1 Always Below 1 ohms Bd1 male connector 4 - d1-2 Always Below 1 ohms Bd1 male connector 3 - d1-1 Always Below 1 ohms Tester Connection Condition Specified Condition Bd1 male connector 2 or d2-2 - Body ground Always 10 kohms or higher Bd1 male connector 1 or d2-1 - Body ground Always 10 kohms or higher Bd1 male connector 4 or d1-2 - Body ground Always 10 kohms or higher Bd1 male connector 3 or d1-1 - Body ground Always 10 kohms or higher Reconnect the Bd1 connector. Reconnect the knock sensor connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (Ba1 CONNECTOR - KNOCK SENSOR) OK --> See step 7
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-422300-S41051796092011092600000)
7. REPLACE KNOCK SENSOR. Refer to «COMPONENTS»(ref-422482-S31555722542011092600000)
8. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)

HINT

1. If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical service information.
2. The engine speed can be checked by using the Techstream. To perform the check, follow the procedures below: Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed. The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower 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 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 659

Scheme 660

1. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) Disconnect the crankshaft position sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 Cold 1630 to 2740 ohms 1 - 2 Hot 2065 to 3225 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Crankshaft Position Sensor) HINT: Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F). Reconnect the crankshaft position sensor connector. NG --> See step 6 OK: Go to next step
2. 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 Check for short Tester Connection Condition Specified Condition B21-1 - B51-6 (NE+) Always Below 1 ohms B21-2 - B51-5 (NE-) Always Below 1 ohms Tester Connection Condition Specified Condition B21-1 or B51-6 (NE+) - Body ground Always 10 kohms or higher B21-2 or B51-5 (NE-) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the crankshaft position sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) OK: Go to next step
3. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Check the crankshaft position sensor installation condition. OK Sensor is installed correctly. NG --> See step 7 OK: Go to next step
4. CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE) Remove the crankshaft position sensor plate, refer to «DISASSEMBLY»(ref-422437-S29651325442011092600000) . Check the teeth of the sensor plate. OK Sensor plate does not have any cracks or deformation. Reinstall the crankshaft position sensor plate, refer to «REASSEMBLY»(ref-422437-S17584641942011092600000) . NG --> See step 8 OK --> See step 5
5. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
6. REPLACE CRANKSHAFT POSITION SENSOR. Refer to «COMPONENTS»(ref-422482-S05976503462011092600000)
7. REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR. Refer to «COMPONENTS»(ref-422482-S05976503462011092600000)
8. REPLACE CRANKSHAFT POSITION SENSOR PLATE. Refer to «COMPONENTS»(ref-422437-S38486217812011092600000)

HINT

1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
3. 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 661

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) Disconnect the VVT sensor connector. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Bank 1 Bank 2 Tester Connection Switch Condition Specified Condition B22-3 (VC) - Body ground Ignition switch on (IG) 4.5 to 5.0 V Tester Connection Switch Condition Specified Condition B23-3 (VC) - Body ground Ignition switch on (IG) 4.5 to 5.0 V TEXT IN ILLUSTRATION *1 Bank 1 *2 Bank 2 *a Front view of wire harness connector (to VVT Sensor for Exhaust Camshaft) Reconnect the VVT sensor connector. NG --> See step 8 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM) Disconnect the VVT sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Bank 1 Bank 2 Tester Connection Condition Specified Condition B22-1 (VVR+) - B51-9 (VV1+) Always Below 1 ohms B22-2 (VVR-) - B51-10 (VV1-) Always Below 1 ohms Tester Connection Condition Specified Condition B23-1 (VVL+) - B51-12 (VV2+) Always Below 1 ohms B23-2 (VVL-) - B51-11 (VV2-) Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition B22-1 (VVR+) or B51-9 (VV1+) - Body ground Always 10 kohms or higher B22-2 (VVR-) or B51-10 (VV1-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B23-1 (VVL+) or B51-12 (VV2+) - Body ground Always 10 kohms or higher B23-2 (VVL-) or B51-11 (VV2-) - Body ground Always 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR - ECM) OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR) Check the VVT sensor installation condition. OK Sensor is installed correctly. NG --> REPAIR OR REPLACE VVT SENSOR OK: Go to next step
4. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE) Check the teeth of the sensor plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> REPLACE CAMSHAFT TIMING GEAR ASSEMBLY OK: Go to next step
5. REPLACE VVT SENSOR Replace the VVT sensor, refer to «COMPONENTS»(ref-422482-S05906177182011092600000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Clear the DTCs. Turn the ignition switch off. Turn the ignition switch on (IG), and turn the Techstream on. Start the engine. Idle the engine for 10 seconds or more. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the pending DTCs. Result Display (DTC Output) Proceed to No output A P0340, P0342, P0343, P0345, P0347 or P0348 B HINT: If the engine does not start, replace the ECM. B --> See step 7 A --> END
7. REPLACE ECM. Refer to «COMPONENTS»(ref-422482-S29849271832011092600000)
8. CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM) Disconnect the VVT sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Bank 1 Bank 2 Tester Connection Condition Specified Condition B22-3 (VC) - B51-15 (VCV1) Always Below 1 ohms Tester Connection Condition Specified Condition B23-3 (VC) - B51-16 (VCV2) Always Below 1 ohms Standard resistance (Check for short) Bank 1 Bank 2 Tester Connection Condition Specified Condition B22-3 (VC) or B51-15 (VCV1) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition B23-3 (VC) or B51-16 (VCV2) - Body ground Always 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR - ECM) OK --> See step 7