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Engine Control System (Diagnostic Codes (P0010-P0351): Diagnosis Scion xD I

Testing & Diagnostics 60 illustrations ~15945 words

INSPECTION PROCEDURE

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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Scheme 137: PROCEDURE

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Scheme 139
  1. CHECK WHETHER DTC OUTPUT RECURS (DTC P0010) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs. Start the engine and warm it up. Allow the engine to idle 1 minute or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0010 A No output B B --> See step 6 A: Go to next step
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the OCV (for intake camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Apply battery voltage to terminals of the OCV (for intake camshaft). Check the valve operation. OK Valve moves quickly. Reinstall the OCV (for intake camshaft). NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (OCV FOR INTAKE CAMSHAFT - ECM) Disconnect the OCV (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C24-1 (OC1+) - C19-100 (OC1+) Always Below 1 ohms C24-2 (OC1-) - C19-123 (OC1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C24-1 (OC1+) or C19-100 (OC1+) - Body ground Always 10 kohms or higher C24-2 (OC1-) or C19-123 (OC1-) - Body ground Always 10 kohms or higher Reconnect the OCV (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  4. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  5. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «REMOVAL»(ref-388735-S33812102812011031100000)
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)

HINT

DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0011 or P0012 A P0011 or P0012 and other DTCs B HINT: If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV FOR INTAKE CAMSHAFT) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Turn the air conditioning switch to ON. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the OCV (for intake camshaft) using the tester. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) HINT: If the result is not acceptable, cool the engine and perform the Active Test again. Start the engine when the engine coolant temperature is 30 °C (86 °F) or less. Turn the Techstream on. Turn the air conditioning switch to ON. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the OCV (for intake camshaft) using the tester with the engine coolant temperature is 50 °C (122 °F) or less. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 5 OK: Go to next step
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine and warm it up. Refer to the confirmation driving pattern for P0011, and P0012. Read the output pending DTCs using the Techstream. Result Result Proceed to No output A P0011 or P0012 B B --> See step 8 A --> See step 4
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the OCV (for intake camshaft), Refer to «REMOVAL»(ref-388735-S33812102812011031100000) . 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 negative battery voltage to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the OCV (for intake camshaft), Refer to «INSTALLATION»(ref-388735-S00587908662011031100000) . NG --> See step 11 OK: Go to next step
  6. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (FOR INTAKE CAMSHAFT) Inspect the camshaft timing gear assembly (for intake camshaft), Refer to «INSPECTION - Step 3»(ref-388728-S10679479242011031100000) . NG --> See step 12 OK: Go to next step
  7. INSPECT OIL CONTROL VALVE FILTER Remove the OCV filter, Refer to «DISASSEMBLY - Step 38»(ref-388728-S16819881332011031100000) . Check that the filter is not clogged. OK Filter is not clogged. Reinstall the OCV filter, Refer to «REASSEMBLY - Step 12»(ref-388728-S18638852092011031100000) . NG --> CLEAN OIL CONTROL VALVE FILTER OK: Go to next step
  8. ADJUST VALVE TIMING HINT: There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and re-install the chain to match up the alignment marks, Refer to «REASSEMBLY - Step 25»(ref-388728-S18638852092011031100000) . NEXT: Go to next step
  9. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine and warm it up. Refer to the confirmation driving pattern for P0011, and P0012. Read the output pending DTCs using the Techstream. Result Result Proceed to No output A P0011 or P0012 B HINT: DTC P0011 or P0012 is output when foreign objects in engine oil are caught in some part of the system. These codes will stay output for a short time even after the system returns to normal. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. B --> See step 13 A --> END
  10. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-388734-S31814561492011031100000)
  11. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «REMOVAL»(ref-388735-S33812102812011031100000)
  12. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «REMOVAL»(ref-388728-S33413564232011031100000)
  13. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

HINT

  1. If DTC P0013 is displayed, check the VVT system (for exhaust camshaft) circuit.
  2. Read freeze frame data using the Techstream. Freeze frame data records the engine conditions 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.

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Scheme 142: PROCEDURE

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  1. CHECK WHETHER DTC OUTPUT RECURS (DTC P0013) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine and warm it up. Allow the engine to idle 1 minute or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0013 A No output B B --> See step 4 A: Go to next step
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) Remove the OCV (for exhaust camshaft). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Apply battery voltage to terminals of the OCV (for exhaust camshaft). Check the valve operation. OK Valve moves quickly. Reinstall the OCV (for exhaust camshaft). NG --> REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (OCV FOR EXHAUST CAMSHAFT - ECM) Disconnect the OCV (for exhaust camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C27-1 (OE1+) - C19-60 (OE1+) Always Below 1 ohms C27-2 (OE1-) - C19-61 (OE1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C27-1 (OE1+) or C19-60 (OE1+) - Body ground Always 10 kohms or higher C27-2 (OE1-) or C19-61 (OE1-) - Body ground Always 10 kohms or higher Reconnect the OCV (for exhaust camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  5. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions 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.

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions 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.

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  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 AND P0017) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0016 or P0017 A P0016 or P0017 and other DTCs B HINT: If any DTCs other than P0016 or P0017 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Enter the following monitors: VVT Change Angle (Bank1) and VVT OCV Duty (Bank1). Check that the VVT Change Angle (Bank1) varies when operating the OCV (for intake camshaft) using the tester. OK The VVT Change Angle (Bank1) value and engine speed vary. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1). Enter the following monitors: VVT Ex Change Angle (Bank1) and VVT Ex OCV Duty (Bank1). Check that the VVT Ex Change Angle (Bank1) value varies when operating the OCV (for exhaust camshaft) using the tester. OK The VVT Ex Change Angle (Bank1) value and engine speed vary. HINT: If the VVT system can be operated through the ACTIVE TEST, it can be assumed that the VVT system is operating normally. NG --> See step 4 OK: Go to next step
  3. ADJUST VALVE TIMING HINT: There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and re-install the chain to match up the alignment marks, Refer to «REASSEMBLY - Step 25»(ref-388728-S18638852092011031100000) . NEXT --> See step 7
  4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE OR EXHAUST CAMSHAFT) HINT: Inspect the specified OCV (OCV for intake camshaft or OCV for exhaust camshaft) in accordance with the inspection result of step 2. Remove the OCV (for intake camshaft) or OCV (for exhaust camshaft), Refer to «REMOVAL»(ref-388735-S33812102812011031100000) . 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 battery voltage to terminals of the OCV (for intake camshaft) or OCV (for exhaust camshaft). Check the valve operation. OK Valve moves quickly. Reinstall the OCV (for intake camshaft) or OCV (for exhaust camshaft), Refer to «INSTALLATION»(ref-388735-S00587908662011031100000) . NG --> See step 9 OK: Go to next step
  5. INSPECT OIL CONTROL VALVE FILTER Remove the OCV filter, Refer to «DISASSEMBLY - Step 38»(ref-388728-S16819881332011031100000) . Check that the filter is not clogged. OK Filter is not clogged. Reinstall the OCV filter, Refer to «REASSEMBLY - Step 12»(ref-388728-S18638852092011031100000) . NG --> CLEAN OIL CONTROL VALVE FILTER OK: Go to next step
  6. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY HINT: Replace the specified camshaft timing gear (camshaft timing gear for intake camshaft or exhaust camshaft) in accordance with the inspection result of step 2. Replace the camshaft timing gear assembly (camshaft timing gear for intake camshaft or exhaust camshaft), Refer to «REMOVAL»(ref-388728-S33413564232011031100000) . NEXT: Go to next step
  7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED In order to erase the ECM's learned values for valve timing, disconnect the cable from the negative (-) battery terminal for 1 minute. Reconnect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine and warm it up. Refer to the confirmation driving pattern for P0016 or P0017. Read the output pending DTCs using the Techstream. Result Result Proceed to No output A P0016 or P0017 B B --> See step 8 A --> END
  8. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  9. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE OR EXHAUST). Refer to «REMOVAL»(ref-388735-S33812102812011031100000)
  10. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-388734-S31814561492011031100000)

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

HINT

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.

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  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 Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. NG --> See step 6 OK: Go to next step
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE) Disconnect the air fuel ratio sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C21-2 (+B) - Body ground Ignition switch ON 11 to 14 V Reconnect the air fuel ratio sensor connector. NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C21-1 (HA1A) - C19-109 (HA1A) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C21-1 (HA1A) or C19-109 (HA1A) - Body ground Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0031, P0032 OR P101D) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0031, P0032 and P101D. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to No output A P0031, P0032 or P101D B B --> See step 7 A --> See step 8
  5. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION RELAY) Disconnect the air fuel ratio sensor connector. Remove the integration relay (EFI relay) from the engine room relay block, Refer to «REMOVAL»(ref-388735-S08410464852011031100000) . Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C21-2 (+B) - 1A-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C21-2 (+B) or 1A-4 - Body ground Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  6. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-388735-S05886652062011031100000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  8. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  9. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-388739-S34858315402011031100000)

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

HINT

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.

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  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 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 Reconnect the heated oxygen sensor connector. NG --> See step 6 OK: Go to next step
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE) Disconnect the heated oxygen sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F27-2 (+B) - Body ground Ignition switch ON 11 to 14 V Reconnect the heated oxygen sensor connector. NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition F27-1 (HT1B) - C19-47 (HT1B) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition F27-1 (HT1B) or C19-47 (HT1B) - Body ground Always 10 kohms or higher Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038, P0141 OR P102D) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0037, P0038, P0141 and P102D. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the pending DTCs. Result Result Proceed to No output A P0037, P0038, P0141 or P102D B B --> See step 7 A --> See step 9
  5. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - INTEGRATION RELAY) Disconnect the heated oxygen sensor connector. Remove the integration relay (EFI relay) from the engine room relay block, Refer to «REMOVAL»(ref-388735-S08410464852011031100000) . Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition F27-2 (+B) - 1A-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition F27-2 (+B) or 1A-4 - Body ground Always 10 kohms or higher Reconnect the heated oxygen sensor connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
  6. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-388735-S02421949602011031100000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  8. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-388739-S34858315402011031100000)
  9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)

HINT

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.

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

HINT

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.

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  1. CHECK WHETHER DTC OUTPUT RECURS (P0102 OR P0103) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine and warm it up. Allow the engine to idle 1 minute or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0102 or P0103 A No output B B --> See step 9 A: Go to next step
  2. INSPECT MASS AIR FLOW METER Read the values using the Techstream (MAF). NOTE: Turn the ignition switch to OFF. Perform the inspection with the vehicle indoors and on a level surface. Perform the inspection of the mass air flow meter while it is installed in the air cleaner case (installed on the vehicle). During the test, do not use the exhaust pipe. Connect the Techstream to the DLC3. Turn the ignition switch to ON (do not start the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF. Wait for 30 seconds, and read the values on the tester. Result Result Proceed to 0.00 g/sec A More than 0.22 g/sec B B --> See step 7 A: Go to next step
  3. INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE) Disconnect the mass air flow meter connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C23-3 (+B) - Body ground Ignition switch ON 11 to 14 V Reconnect the mass air flow meter connector. NG --> See step 6 OK: Go to next step
  4. INSPECT MASS AIR FLOW METER Remove the mass air flow meter with the wire harness connector connected. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF. Check the MAF value when air is blown to the mass air flow meter, as shown in the illustration. OK The MAF value changes. NG --> See step 10 OK: Go to next step
  5. 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 C23-5 (VG) - C19-118 (VG) Always Below 1 ohms C23-4 (E2G) - C19-116 (E2G) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C23-5 (VG) or C19-118 (VG) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
  6. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - INTEGRATION RELAY) Disconnect the mass air flow meter connector. Remove the integration relay (EFI relay) from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C23-3 (+B) - 1A-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C23-3 (+B) or 1A-4 - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
  7. 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 Tester Connection Condition Specified Condition C23-4 (E2G) - Body ground Always Below 1 ohms Reconnect the mass air flow meter connector. NG --> See step 8 OK --> See step 13
  8. 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 C23-5 (VG) - C19-118 (VG) Always Below 1 ohms C23-4 (E2G) - C19-116 (E2G) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C23-5 (VG) or C19-118 (VG) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
  9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  10. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  11. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  12. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-388739-S34858315402011031100000)
  13. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  14. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

Scheme 160

Scheme 160: DESCRIPTION
Scheme 160: DESCRIPTION
  1. The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the IAT is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (Scheme 160)
  2. The IAT sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.
  3. Resistor R and the IAT sensor are connected in series. When the resistance value of the IAT sensor changes, according to changes in the IAT, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.
DTC No.DTC Detection ConditionTrouble Area
P0111When either of following conditions are met (2 trip detection logic): In duration between engine warmed up and next engine starts, change in Intake Air Temperature (IAT) sensor output below threshold During engine warming up after cold engine starts, change in IAT sensor output below thresholdMass air flow meter

HINT

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.

Scheme 161

Scheme 161: PROCEDURE
Scheme 161: PROCEDURE

Scheme 162

Scheme 162
Scheme 162

Scheme 163

Scheme 163
Scheme 163

Scheme 164

Scheme 164
Scheme 164
  1. READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / All Data / Intake Air. Read the value displayed on the tester. OK Same as actual Intake Air Temperature (IAT). Result Result Proceed to -40°C (-40°F) A 140°C (284°F) or higher B Same as actual IAT C HINT: If there is an open circuit, the tester indicates -40°C (-40°F). If there is a short circuit, the tester indicates 140°C (284°F) or higher. C --> See step 4 B --> 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 1 (THA) and 2 (E2) of the MAF meter wire harness side connector. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / All Data / Intake Air. Read the value displayed on the tester. Standard value 140°C (284°F) or higher Reconnect the mass air flow meter connector. NG --> See step 3 OK --> See step 5
  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 C23-1 (THA) - C19-65 (THA) Always Below 1 ohms C23-2 (E2) - C19-88 (ETHA) Always Below 1 ohms Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  5. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  6. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-388639-S24992445372011031100000)
  7. 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 to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / All Data / Intake Air. Read the value displayed on the tester. Standard value -40°C (-40°F) Reconnect the mass air flow meter connector. NG --> See step 8 OK --> See step 9
  8. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C23-1 (THA) or C19-65 (THA) - Body ground Always 10 kohms or higher Reconnect the mass air flow meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  9. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  10. REPLACE ECM. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-388639-S24992445372011031100000)

HINT

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.

Scheme 165

Scheme 165: PROCEDURE
Scheme 165: PROCEDURE

Scheme 166

Scheme 166
Scheme 166

Scheme 167

Scheme 167
Scheme 167

Scheme 168

Scheme 168
Scheme 168
  1. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp. Read the value displayed on the tester. Standard value Between 80°C and 100°C (167°F and 212°F) with warm engine. Result Result Proceed to -40°C (-40°F) A 140°C (284°F) or higher B Between 80°C and 100°C (176°F and 212°F) C HINT: If there is an open circuit, the tester indicates -40°C (-40°F). If there is a short circuit, the tester indicates 140°C (284°F) or higher. C --> See step 4 B --> See step 7 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 to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp. Read the value displayed on the tester. Standard value 140°C (284°F) or higher. Reconnect the engine coolant temperature sensor connector. NG --> See step 3 OK --> See step 5
  3. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C18-2 - C19-97 (THW) Always Below 1 ohms C18-1 - C19-96 (ETHW) Always Below 1 ohms Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  5. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-388735-S27134545902011031100000)
  6. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  7. 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 to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp. Read the value displayed on the tester. Standard value -40°C (-40°F) Reconnect the engine coolant temperature sensor connector. NG --> See step 8 OK --> See step 9
  8. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C18-2 or C19-97 (THW) - Body ground Always 10 kohms or higher Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  9. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-388735-S27134545902011031100000)
  10. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

HINT

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

HINT

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.

Scheme 169

Scheme 169: PROCEDURE
Scheme 169: PROCEDURE

Scheme 170

Scheme 170
Scheme 170
  1. READ VALUE USING TECHSTREAM (THROTTLE POSITION SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Position No. 1 and Throttle Position No. 2. Read the values displayed on the tester. Result When Accelerator Pedal Released When Accelerator Pedal Depressed Trouble Area Proceed to Throttle Position No. 1 Throttle Position No. 2 Throttle Position No. 1 Throttle Position No. 2 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V VC circuit open A 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V E2 circuit open 0 to 0.2 V, or 4.5 to 5.0 V 2.1 V to 3.1 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 2.1 V to 3.1 V (Fail-safe) VTA1 circuit open or ground short 0.6 V to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 0.6 V to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V VTA2 circuit open or ground short 0.5 to 1.1 V 2.1 to 3.1 V 3.2 to 4.8 V (Not fail-safe) 4.6 to 5.0 V (Not fail-safe) TP sensor circuit normal B HINT: DTC P0121 is stored when the voltages output from VTA1 and VTA2 are not consistent with the characteristics of the sensors. Therefore, check the Freeze Frame Data when this DTC is output. Use the following formula to confirm relative fluctuations in voltage. Features VTA2 x 0.8 is approximately equal to VTA1 +1.11 V VTA1: Throttle Position No. 1 VTA2: Throttle Position No. 2 If DTC P0121 is output, proceed to "CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)". B --> See step 5 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the throttle body 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 C17-5 (VC) - C19-67 (VCTA) Always Below 1 ohms C17-6 (VTA) - C19-115 (VTA1) Always Below 1 ohms C17-4 (VTA2) - C19-114 (VTA2) Always Below 1 ohms C17-3 (E2) - C19-91 (ETA) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C17-5 (VC) or C19-67 (VCTA) - Body ground Always 10 kohms or higher C17-6 (VTA) or C19-115 (VTA1) - Body ground Always 10 kohms or higher C17-4 (VTA2) or C19-114 (VTA2) - Body ground Always 10 kohms or higher Reconnect the throttle body connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT ECM (VC VOLTAGE) Disconnect the throttle body connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C17-5 (VC) - C17-3 (E2) Ignition switch ON 4.5 to 5.5 V Reconnect the throttle body connector. NG --> See step 6 OK: Go to next step
  4. REPLACE THROTTLE BODY Replace throttle body, Refer to «REMOVAL»(ref-388735-S12806086742011031100000) . NEXT: Go to next step
  5. CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0120, P0121, P0122, P0123, P0220, P0222, P0223, and P2135. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0120, P0121, P0122, P0123, P0220, P0222, P0223 and/or P2135 A No output B B --> END A --> See step 7
  6. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

HINT

  1. If any of DTCs P0115, P0116, P0117 or P0118 are set simultaneously with DTC P0125, the Engine Coolant Temperature (ECT) sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  2. 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.

HINT

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.

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 (A/F) sensor, Heated Oxygen (HO2) 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 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 A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2) 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.
Tester Display (Sensor)Injection VolumeStatusVoltage
AFS Voltage B1S1 (A/F)+25%RichLess than 3.1 V
12.5%LeanMore than 3.4 V
O2S B1S2 (HO2)+25%RichMore than 0.55 V
12.5%LeanLess than 0.4 V

Note. The Air Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit 3 HO2 sensor HO2 sensor heater HO2 sensor circuit 4 Injector Fuel pressure Gas leak from exhaust system (Air fuel ratio extremely rich or lean)

Scheme 171

Scheme 171
Scheme 171

Scheme 172

Scheme 172
Scheme 172

Scheme 173

Scheme 173
Scheme 173
  1. Following the Control the Injection Volume for A/F sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
  2. To display the graph, Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2; then press the graph button on the Data List view.

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

HINT

  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.

Scheme 174

Scheme 174: PROCEDURE
Scheme 174: PROCEDURE

Scheme 175

Scheme 175
Scheme 175

Scheme 176

Scheme 176
Scheme 176

Scheme 177

Scheme 177
Scheme 177

Scheme 178

Scheme 178
Scheme 178
  1. READ DTC OUTPUT (DTC P0136, P0137, P0138 OR P0139) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0138 A P0137 B P0136 C P0139 D D --> See step 18 C --> See step 7 B --> See step 9 A: Go to next step
  2. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / O2S B1S2. Allow the engine to idle. Read the Heated Oxygen (HO2) sensor output voltage while idling. Result Result Proceed to 1.0 V or more A Less than 1.0 V B B --> See step 5 A: Go to next step
  3. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Reconnect the heated oxygen sensor connector. NG --> See step 23 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch to 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 Tester Connection Condition Specified Condition C19-47 (HT1B) - C19-64 (OX1B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 24
  5. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine and warm it up. Enter the following menus: Powertrain / Engine 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 (A/F) and Heated Oxygen (HO2) sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The A/F sensor is displayed as AFS Voltage B1S1 and the HO2 sensor is displayed as O2S B1S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Result Tester Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (A/F) 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 HO2 sensor voltage (O2S B1S2) reacts in accordance with increases and decreases in fuel injection volumes. When the A/F sensor voltage remains at either less or more than 3.3 V despite the HO2 sensor indicating a normal reaction, the A/F sensor is malfunctioning. NG --> See step 15 OK: Go to next step
  6. INSPECT AIR FUEL RATIO SENSOR HINT: This A/F sensor test is to check the A/F sensor current during the fuel-cut. When the sensor is normal, the sensor current will indicate below 3.0 mA in this test. Clear DTCs Drive the vehicle according to the drive pattern listed below: Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or more. Drive the vehicle at 60 km/h (40 mph) or more for 10 minutes or more. Stop the vehicle. Accelerate the vehicle to 60 km/h (40 mph) or more and decelerate for 5 seconds or more. Perform this 3 times. Enter the following menus: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details. Confirm that RANGE B1S1 are either PASS or FAIL. If the Techstream shows incomplete, recheck RANGE B1S1 after performing the drive pattern. HINT: If the Techstream shows incomplete again, increase the vehicle speed and use second gear to decelerate the vehicle. Select the RANGE B1S1. Read the test value. Standard Current Less than 3.0 mA NOTE: Do not turn the ignition switch off during this step because the test results will be lost. NG --> See step 15 OK --> See step 12
  7. READ VALUE USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / All Data / O2S B1S2. Change the fuel injection volume using the Techstream, monitoring the voltage output of the HO2 sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of - 12% to +12%. The injection volume can be changed in 1% gradations within this 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 below 0.4 V and 0.55 V or higher. NG --> See step 9 OK: Go to next step
  8. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Start the engine and warm it up. Enter the following menus: Powertrain / Engine 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 (A/F) and Heated Oxygen (HO2) sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The A/F sensor is displayed as AFS Voltage B1S1 and the HO2 sensor is displayed as O2S B1S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Result Tester Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (A/F) 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 HO2 sensor voltage (O2S B1S2) reacts in accordance with increases and decreases in fuel injection volumes. When the A/F sensor voltage remains at either less or more than 3.3 V despite the HO2 sensor indicating a normal reaction, the A/F sensor is malfunctioning. NG --> See step 15 OK --> CHECK AND REPLACE EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (FUEL INJECTOR, FUEL PRESSURE, GAS LEAK FROM SYSTEM, ETC)
  9. CHECK FOR EXHAUST GAS LEAK OK No gas leak. NG --> See step 25 OK: Go to next step
  10. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 26 OK: Go to next step
  11. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition F27-1 (HT1B) - C19-47 (HT1B) Always Below 1 ohms F27-3 (OX1B) - C19-64 (OX1B) F27-4 (E2) - C19-87 (EX1B) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition F27-1 (HT1B) or C19-47 (HT1B) - Body ground Always 10 kohms or higher F27-3 (OX1B) or C19-64 (OX1B) - Body ground Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  12. REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor, Refer to «REMOVAL»(ref-388735-S02421949602011031100000) . NEXT: Go to next step
  13. PERFORM CONFIRMATION DRIVING PATTERN HINT: Refer to the confirmation driving pattern for P0136, P0137 and P0138. NEXT: Go to next step
  14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0136, P0137 and P0138. Check that 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 or P0138 detected) A NORMAL (DTC is not output) B B --> END A --> See step 31
  15. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor, Refer to «REMOVAL»(ref-388735-S05886652062011031100000) . NEXT: Go to next step
  16. PERFORM CONFIRMATION DRIVING PATTERN HINT: Refer to the confirmation driving pattern for P0136, P0137 and P0138. NEXT: Go to next step
  17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0136, P0137 and P0138. Check that 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 or P0138 detected) B B --> See step 26 A --> END
  18. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / O2S B1S2. After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes. Allow the engine to idle. Depress the accelerator pedal quickly until the engine speed reaches 2500 rpm 3 times. Result Result Proceed to 1.0 V or higher A Below 1.0 V B B --> See step 21 A: Go to next step
  19. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Reconnect the heated oxygen sensor connector. NG --> See step 28 OK: Go to next step
  20. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch to 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 Tester Connection Condition Specified Condition C19-47 (HT1B) - C19-64 (OX1B) Always 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 29
  21. PERFORM CONFIRMATION DRIVING PATTERN HINT: Refer to the confirmation driving pattern for P0139. NEXT: Go to next step
  22. READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN) Read the DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Result Result Proceed to ABNORMAL (DTC P0139 is output) A NORMAL (DTC is not output) B B --> See step 30 A --> See step 27
  23. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-388735-S02421949602011031100000)
  24. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  25. REPAIR OR REPLACE EXHAUST GAS LEAK POINT. Refer to «COMPONENTS»(ref-388744-S38292774422011031100000)
  26. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-388735-S02421949602011031100000)
  27. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-388735-S02421949602011031100000)
  28. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-388735-S02421949602011031100000)
  29. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  30. CHECK INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  31. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-388735-S05886652062011031100000)

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 (A/F) sensor, Heated Oxygen (HO2) 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 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 A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2) 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.
Tester Display (Sensor)Injection VolumeStatusVoltage
AFS Voltage B1S1 (A/F)+25%RichLess than 3.1 V
12.5%LeanMore than 3.4 V
O2S B1S2 (HO2)+25%RichMore than 0.55 V
12.5%LeanLess than 0.4 V

Note. The Air Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit 3 HO2 sensor HO2 sensor heater HO2 sensor circuit 4 Injector Fuel pressure Gas leak from exhaust system (Air fuel ratio extremely rich or lean)

  1. Following the Control the Injection Volume for A/F sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
  2. To display the graph, Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2; then press the graph button on the Data List view.

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

HINT

  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. A low A/F sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
  3. A high A/F sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.

Scheme 179

Scheme 179: PROCEDURE
Scheme 179: PROCEDURE
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171 OR P0172) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0171 or P0172 A P0171 or P0172 and other DTCs B HINT: If any DTCs other than P0171 or P0172 are output, troubleshoot those DTCs first. B --> See step 17 A: Go to next step
  2. CHECK 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 - Step 1»(ref-388743-S29392626042011031100000) . 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 (A/F CONTROL) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds. Enter the following menus: Powertrain / Engine 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 (A/F) sensor and the Heated Oxygen (HO2) sensor (AFS B1S1 and O2S B1S2) 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. 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 Tester Display (Sensor) Injection Volume Status Voltage AFS B1S1 (A/F) +25% Rich Less than 3.1 -12.5% Lean More than 3.4 O2S B1S2 (HO2) +25% Rich More than 0.55 -12.5% Lean Less than 0.4 RESULT: Status AFS B1S1 Status O2S B1S2 A/F Condition and A/F 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 (MAF) meter Engine Coolant Temperature (ECT) sensor A Rich Rich Actual air fuel ratio rich - Injector blockage or blockage Gas leak from exhaust system Ignition system Fuel pressure MAF meter ECT sensor Lean Lean/Rich A/F sensor malfunction - A/F sensor B Rich Lean/Rich A/F sensor malfunction - A/F sensor Lean: During Control the Injection Volume for A/F Sensor, the A/F sensor output voltage (AFS) is consistently more than 3.4 V, and the HO2 sensor output voltage (O2S) is consistently less than 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS is consistently less than 3.1 V, and the O2S is consistently more than 0.55 V. Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the 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 to ON. Turn the Techstream on. Enter the following menus: 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 18 OK: Go to next step
  6. INSPECT MASS AIR FLOW METER Read the values using the Techstream (MAF). NOTE: Turn the ignition switch to OFF. Perform the inspection with the vehicle indoors and on a level surface. Perform the inspection of the mass air flow meter while it is installed in the air cleaner case (installed on the vehicle). During the test, do not use the exhaust air duct to perform suction on the exhaust pipe. Connect the Techstream to the DLC3. Turn the ignition switch to ON (do not start the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF. Wait for 30 seconds, and read the values on the tester. Standard Value 0.22 g/sec or less Inspect the mass air flow meter. Remove the mass air flow meter, Refer to «REMOVAL»(ref-388735-S00481504932011031100000) . Using a work light, check that the platinum filament (heater portion) in the mass air flow meter has no foreign matter attached. OK No foreign matter attached. Reinstall the mass air flow meter, Refer to «INSTALLATION»(ref-388735-S24999387662011031100000) . NG --> See step 19 OK: Go to next step
  7. CHECK FUEL PRESSURE Check the fuel pressure, Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-388745-S39058734952011031100000) . NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
  8. CHECK FOR EXHAUST GAS LEAK OK No gas leak. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
  9. CHECK SPARK AND IGNITION HINT: Refer to the ignition system inspection procedure, Refer to «ON-VEHICLE INSPECTION»(ref-388729-S41054930162011031100000) . If the spark plugs or ignition system malfunctions, engine misfire may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Cylinder #1 Misfire Count (to Cylinder #4 Misfire Count) 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-388742-S38387298712011031100000) . If the injectors malfunction, engine misfire may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Cylinder #1 Misfire Count (to Cylinder #4 Misfire Count). NG --> See step 20 OK --> See step 15
  11. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 21 OK: Go to next step
  12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR) See step 2 NG --> See step 23 OK: Go to next step
  13. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) See step 3 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 «REMOVAL»(ref-388735-S05886652062011031100000) . NEXT: Go to next step
  15. PERFORM CONFIRMATION DRIVING PATTERN Refer to the confirmation driving pattern for P0171, and P0172. NEXT: Go to next step
  16. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171 OR P0172) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the pending DTCs. Result Result Proceed to No output A P0171 or P0172 B B --> See step 22 A --> END
  17. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-388734-S31814561492011031100000)
  18. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-388735-S27134545902011031100000)
  19. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  20. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-388742-S05379933692011031100000)
  21. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-388735-S05886652062011031100000)
  22. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  23. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION RELAY) See step 5 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 24
  24. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-388739-S34858315402011031100000)

Scheme 180

Scheme 180: DESCRIPTION
Scheme 180: DESCRIPTION

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. High HC concentration levels can cause increase in exhaust emission levels. Extremely high concentrations of HC can also cause increases in the Three-Way Catalytic Converter (TWC) temperature, which may cause damage to the TWC. 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 TWC reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the Camshaft Position (CMP) sensor and the Crankshaft Position (CKP) sensor. The CMP sensor is used to identify any misfiring cylinders and the CKP 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, and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

DTC No.DTC Detection ConditionTrouble Area
P0300When one of following conditions below is detected (2 trip detection logic): High temperature misfire occurs in Three-Way Catalytic Converter (TWC) (MIL blinks) Emission deterioration misfire occurs (MIL illuminates) Simultaneous misfiring of several cylinders occursOpen or short in engine wire harness Connector connection Vacuum hose connections Ignition system Fuel injector Fuel pressure Mass Air Flow (MAF) meter Engine Coolant Temperature (ECT) sensor Compression pressure Valve clearance Valve timing PCV valve and hose PCV hose connections Air induction system ECM
P0301 P0302 P0303 P0304When one of following conditions below is detected (2 trip detection logic): High temperature misfire occurs in Three-Way Catalytic Converter (TWC) (MIL blinks) Emission deterioration misfire occurs (MIL illuminates) Misfiring of specific cylinder occurs

When DTCs for misfiring cylinders are randomly 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.

HINT

  1. If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
  2. 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.
  3. 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.
  4. If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame data have been reproduced, one of the following factors is considered to be a possible cause of the problem: There was insufficient fuel in the tank. Improper fuel is used. The spark plugs have been contaminated.
  5. After finishing repairs, check the misfire counts of the cylinders Cylinder #1 Misfire Count to Cylinder #4 Misfire Count.
  6. Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving pattern after finishing repairs.
  7. 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).
  8. When the Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfire has occurred only while warming up the engine.
  9. An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

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

Scheme 181

Scheme 181: PROCEDURE
Scheme 181: PROCEDURE

Scheme 182

Scheme 182
Scheme 182

Scheme 183

Scheme 183
Scheme 183
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. HINT: Write down indicated DTCs. Result Result Proceed to P0300, P0301, P0302, P0303 and/or P0304 A P0300, P0301, P0302, P0303 and/or P0304 and other DTCs B HINT: If any DTCs other than P0300, P0301, P0302, P0303 and P0304 are output, troubleshoot those DTCs first. B --> See step 31 A: Go to next step
  2. READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / 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
  3. CHECK PCV HOSE CONNECTIONS OK PCV hose is correctly connected and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
  4. READ VALUE USING TECHSTREAM (CAT OT MF F/C) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine 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 (PROHIBIT CAT OT FC) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream 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 (CYLINDER #1 MISFIRE COUNT, #2, #3 AND #4) Enter the following menus: Powertrain / Engine and ECT / Data List / Cylinder #1 Misfire Count, #2, #3 and #4. Start the engine and allow the engine to idle. Read each value for Cylinder #1 Misfire Count to #4 displayed on the tester. If no misfire counts occur in any cylinders, perform steps (d) and (e) and then check the misfire counts again. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD)" procedures above. Read the Cylinder #1 Misfire Count to #4 or DTCs displayed on the Techstream. Result Result (Misfire Count) Proceed to Most misfires occur in only 1 or 2 cylinders A 3 cylinders or more have equal misfire counts B HINT: If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal. If the freeze frame data's record of the ECT 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. INSPECT SPARK PLUG Remove the ignition coil and the spark plug from the misfiring cylinder. Measure the spark plug electrode gap. Standard gap 1.0 to 1.1 mm (0.039 to 0.043 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO SC20HR11 NOTE: If the electrode gap is out of standard, replace the spark plug. Do not adjust the electrode gap. Reinstall the ignition coil. NG --> See step 33 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. 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. NOTE: Do not crank the engine for more than 2 seconds. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
  9. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder, Refer to «ON-VEHICLE INSPECTION - Step 8»(ref-388728-S03994150272011031100000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
  10. INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30 AND /OR #40 VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C19-108 (#10) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-107 (#20) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-106 (#30) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-105 (#40) - C19-45 (E01) Ignition switch ON 11 to 14 V Reconnect the ECM connector. NG --> See step 34 OK: Go to next step
  11. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor), Refer to «INSPECTION - Step 1»(ref-388742-S00364723892011031100000) . NG --> See step 35 OK: Go to next step
  12. CHECK VALVE CLEARANCE OF MISFIRING CYLINDER Check the valve lash adjuster and valve rocker arm of misfiring cylinder, Refer to «INSPECTION - Step 2»(ref-388728-S10679479242011031100000) . NG --> See step 36 OK: Go to next step
  13. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leak, Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-388743-S29392626042011031100000) . OK No leak from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
  14. CHECK VALVE TIMING See step 8 NG --> See step 37 OK: Go to next step
  15. CHECK FUEL PRESSURE Check the fuel pressure, Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-388745-S39058734952011031100000) . NG --> REPAIR OR REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE OR FILTER OK: Go to next step
  16. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 38 OK: Go to next step
  17. INSPECT MASS AIR FLOW METER See step 6 NG --> See step 39 OK --> See step 40
  18. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leak, Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-388743-S29392626042011031100000) . OK No leak from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
  19. CHECK VALVE TIMING See step 8 NG --> See step 37 OK: Go to next step
  20. CHECK FUEL PRESSURE Check the fuel pressure, Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-388745-S39058734952011031100000) . NG --> REPAIR OR REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE OR FILTER OK: Go to next step
  21. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 38 OK: Go to next step
  22. INSPECT MASS AIR FLOW METER See step 6 NG --> See step 39 OK: Go to next step
  23. INSPECT SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Standard gap 1.0 to 1.1 mm (0.039 to 0.043 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO SC20HR11 NOTE: If the electrode gap is out of standard, replace the spark plug. Do not adjust the electrode gap. Reinstall the ignition coil. NG --> See step 41 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. 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. NOTE: Do not crank the engine for more than 2 seconds. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
  25. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder, Refer to «ON-VEHICLE INSPECTION - Step 8»(ref-388728-S03994150272011031100000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
  26. INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30 AND/OR #40 VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C19-108 (#10) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-107 (#20) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-106 (#30) - C19-45 (E01) Ignition switch ON 11 to 14 V C19-105 (#40) - C19-45 (E01) Ignition switch ON 11 to 14 V Reconnect the ECM connector. NG --> See step 34 OK: Go to next step
  27. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor), Refer to «INSPECTION - Step 1»(ref-388742-S00364723892011031100000) . NG --> See step 35 OK: Go to next step
  28. CHECK VALVE CLEARANCE OF MISFIRING CYLINDER Check the valve lash adjuster and valve rocker arm of misfiring cylinder, Refer to «INSPECTION - Step 2»(ref-388728-S10679479242011031100000) . NG --> See step 36 OK --> See step 32
  29. 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 into the ignition coil and connect the ignition coil connector. Disconnect the injector connector. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 30 OK --> See step 41
  30. CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER Change the ignition coil to a ignition coil 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 into the ignition coil and connect the ignition coil connector. Disconnect the injector connector. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 40 OK --> See step 42
  31. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-388734-S31814561492011031100000)
  32. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  33. REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-388746-S27889390792011031100000)
  34. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-388739-S22496850452011031100000)
  35. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-388742-S05379933692011031100000)
  36. REPAIR OR REPLACE VALVE LASH ADJUSTER ASSEMBLY. Refer to «DISASSEMBLY»(ref-388728-S10375931252011031100000)
  37. ADJUST VALVE TIMING. Refer to «REASSEMBLY - Step 25»(ref-388728-S18638852092011031100000)
  38. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-388735-S27134545902011031100000)
  39. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-388735-S00481504932011031100000)
  40. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  41. REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-388746-S27889390792011031100000)
  42. REPLACE IGNITION COIL. Refer to «REMOVAL»(ref-388746-S27889390792011031100000)

HINT

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.

Scheme 184

Scheme 184: PROCEDURE
Scheme 184: PROCEDURE

Scheme 185

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Scheme 185

Scheme 186

Scheme 186
Scheme 186
  1. READ VALUE USING TECHSTREAM (KNOCK FEEDBACK VALUE) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / All Data / Knock Feedback Value. Read the value while driving the vehicle. OK The value changes. HINT: Malfunction does not occur Knock Feedback Value changes Malfunctions occur Knock Feedback Value does not change The knock feedback value change can be confirmed by running the engine with a high load, for example, by activating the air conditioning system and revving the engine. NG --> See step 2 OK --> See step 5
  2. INSPECT ECM (KNK1 VOLTAGE) Disconnect the knock sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition E1-2 - E1-1 Ignition switch ON 4.5 to 5.5 V Reconnect the knock sensor connector. NG --> See step 4 OK: Go to next step
  3. INSPECT KNOCK SENSOR Remove the knock sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 120 to 280 kohms Reinstall the knock sensor. NG --> See step 7 OK --> See step 6
  4. CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR) Disconnect the knock sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition E1-2 - C19-110 (KNK1) Always Below 1 ohms E1-1 - C19-111 (EKNK) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition E1-2 or C19-110 (KNK1) - Body ground Always 10 kohms or higher E1-1 or C19-111 (EKNK) - Body ground Always 10 kohms or higher Reconnect the knock sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  7. REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-388735-S35382892232011031100000)

HINT

  1. If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical systems.
  2. Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the operation 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 revolving normally. This is caused by a lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.
  3. 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.

Scheme 187

Scheme 187: PROCEDURE
Scheme 187: PROCEDURE

Scheme 188

Scheme 188
Scheme 188

Scheme 189

Scheme 189
Scheme 189
  1. READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed. Start the engine. Read the values displayed on the tester while the engine is running. OK Correct values are displayed. HINT: To check the engine speed change, display the graph on the tester. If the engine does not start, check the engine speed while cranking. If the engine speed indicated on the tester remains at zero (0), there may be an open or short in the crankshaft position sensor circuit. NG --> See step 2 OK --> See step 8
  2. 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 20°C (68°F) 1850 to 2450 ohms Reconnect the crankshaft position sensor connector. NG --> See step 9 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C2-1 - C19-122 (NE+) Always Below 1 ohms C2-2 - C19-121 (NE-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C2-1 or C19-122 (NE+) - Body ground Always 10 kohms or higher C2-2 or C19-121 (NE-) - Body ground Always 10 kohms or higher Reconnect the crankshaft position sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Check the crankshaft position sensor installation. OK Sensor is installed correctly. NG --> See step 10 OK: Go to next step
  5. INSPECT CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE) Check the teeth of the sensor plate. OK Sensor plate does not have any cracks or deformation. NG --> See step 11 OK: Go to next step
  6. REPLACE CRANKSHAFT POSITION SENSOR Replace crankshaft position sensor, Refer to «REMOVAL»(ref-388735-S41899630452011031100000) . NEXT: Go to next step
  7. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0335, and P0339. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to No output A P0335 or P0339 B HINT: If the engine does not start, replace the ECM. B --> See step 12 A --> END
  8. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-388734-S30722680022011031100000)
  9. REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-388735-S41899630452011031100000)
  10. SECURELY REINSTALL SENSOR. Refer to «INSTALLATION»(ref-388735-S22926160812011031100000)
  11. REPLACE CRANKSHAFT POSITION SENSOR PLATE. Refer to «DISASSEMBLY»(ref-388728-S10375931252011031100000)
  12. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

HINT

  1. Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

Scheme 190

Scheme 190: PROCEDURE
Scheme 190: PROCEDURE

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Scheme 191

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Scheme 193
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0340, P0342 AND P0343) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to P0340, P0342 or P0343 A P0340, P0342 or P0343 and other DTCs B HINT: If any DTCs other than P0340, P0342 and P0343 are output, troubleshoot those DTCs first. B --> See step 11 A: Go to next step
  2. INSPECT CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) (POWER SOURCE) Disconnect the camshaft position sensor (for intake camshaft) connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C26-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V Reconnect the camshaft position sensor (for intake camshaft) connector. NG --> See step 10 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C26-1 (VV1+) - C19-99 (G2+) Always Below 1 ohms C26-2 (VV1-) - C19-98 (G2-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C26-1 (VV1+) or C19-99 (G2+) - Body ground Always 10 kohms or higher C26-2 (VV1-) or C19-98 (G2-) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT) Check the camshaft position sensor (for intake camshaft) installation. OK Sensor is installed correctly. NG --> SECURELY REINSTALL SENSOR OK: Go to next step
  5. INSPECT INTAKE CAMSHAFT (TIMING ROTOR) Check the timing rotor of the intake camshaft. OK Camshaft timing rotor does not have any cracks or deformation. NG --> REPLACE INTAKE CAMSHAFT OK: Go to next step
  6. REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) Replace camshaft position sensor, Refer to «REMOVAL»(ref-388735-S03403130892011031100000) . NEXT: Go to next step
  7. CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0340, P0342 and P0343. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the pending DTCs. Result Result Proceed to No output A P0340, P0342 or P0343 B HINT: If the engine does not start, replace the ECM. B --> See step 12 A: Go to next step
  8. ADJUST VALVE TIMING HINT: There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and re-install the chain to match up the alignment marks, Refer to «REASSEMBLY - Step 25»(ref-388728-S18638852092011031100000) . NEXT: Go to next step
  9. CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Start the engine. Refer to the confirmation driving pattern for P0340, P0342 and P0343. Enter the following menus: Powertrain / Engine and ECT / Trouble codes. Read the pending DTCs. Result Result Proceed to No output A P0340, P0342 or P0343 B HINT: If the engine does not start, replace the ECM. B --> See step 12 A --> END
  10. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the camshaft position sensor (for intake camshaft) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C26-3 (VC) - C19-70 (VCV1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C26-3 (VC) or C19-70 (VCV1) - Body ground Always 10 kohms or higher Reconnect the camshaft position sensor (for intake camshaft) connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
  11. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-388734-S31814561492011031100000)
  12. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)

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

HINT

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.

Scheme 194

Scheme 194: PROCEDURE
Scheme 194: PROCEDURE

Scheme 195

Scheme 195
Scheme 195

Scheme 196

Scheme 196
Scheme 196
  1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) Disconnect the ignition coil connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C11-4 (GND) - Body ground Always Below 1 ohms C12-4 (GND) - Body ground Always Below 1 ohms C13-4 (GND) - Body ground Always Below 1 ohms C14-4 (GND) - Body ground Always Below 1 ohms Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C11-1 (+B) - C11-4 (GND) Ignition switch ON 11 to 14 V C12-1 (+B) - C12-4 (GND) Ignition switch ON 11 to 14 V C13-1 (+B) - C13-4 (GND) Ignition switch ON 11 to 14 V C14-1 (+B) - C14-4 (GND) Ignition switch ON 11 to 14 V Reconnect the ignition coil connectors. NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM) Disconnect the ignition coil connectors. 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 C11-2 (IGF) - C19-81 (IGF1) Always Below 1 ohms C12-2 (IGF) - C19-81 (IGF1) Always Below 1 ohms C13-2 (IGF) - C19-81 (IGF1) Always Below 1 ohms C14-2 (IGF) - C19-81 (IGF1) Always Below 1 ohms Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C11-3 (IGT1) - C19-85 (IGT1) Always Below 1 ohms C12-3 (IGT2) - C19-84 (IGT2) Always Below 1 ohms C13-3 (IGT3) - C19-83 (IGT3) Always Below 1 ohms C14-3 (IGT4) - C19-82 (IGT4) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C11-2 (IGF) or C19-81 (IGF1) - Body ground Always 10 kohms or higher C12-2 (IGF) or C19-81 (IGF1) - Body ground Always 10 kohms or higher C13-2 (IGF) or C19-81 (IGF1) - Body ground Always 10 kohms or higher C14-2 (IGF) or C19-81 (IGF1) - Body ground Always 10 kohms or higher Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C11-3 (IGT1) or C19-85 (IGT1) - Body ground Always 10 kohms or higher C12-3 (IGT2) or C19-84 (IGT2) - Body ground Always 10 kohms or higher C13-3 (IGT3) or C19-83 (IGT3) - Body ground Always 10 kohms or higher C14-3 (IGT4) or C19-82 (IGT4) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the ignition coil connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs, Refer to «DTC CHECK / CLEAR»(ref-388734-S06424090862011031100000) . Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 4 cylinders). NOTE: Do not shuffle the connectors. Refer to the confirmation driving pattern for P0351, P0352, P0353, and P0354. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Result Proceed to Same DTC output A Different ignition coil DTC output B B --> See step 4 A --> See step 5
  4. REPLACE IGNITION COIL ASSEMBLY. Refer to «REMOVAL»(ref-388746-S27889390792011031100000)
  5. REPLACE ECM. Refer to «REMOVAL»(ref-388735-S27161698942011031100000)
  6. CHECK HARNESS AND CONNECTOR (IGNITION COIL - INTEGRATION RELAY) Disconnect the ignition coil connectors. Remove the integration relay (IG2 relay) from the engine room relay block, Refer to «REMOVAL»(ref-388735-S08410464852011031100000) . Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C11-1 (+B) - 1B-4 Always Below 1 ohms C12-1 (+B) - 1B-4 Always Below 1 ohms C13-1 (+B) - 1B-4 Always Below 1 ohms C14-1 (+B) - 1B-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C11-1 (+B) or 1B-4 - Body ground Always 10 kohms or higher C12-1 (+B) or 1B-4 - Body ground Always 10 kohms or higher C13-1 (+B) or 1B-4 - Body ground Always 10 kohms or higher C14-1 (+B) or 1B-4 - Body ground Always 10 kohms or higher Reinstall the integration relay. Reconnect the ignition coil connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  7. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-388739-S34858315402011031100000)

More articles — Engine Control System (Diagnostic Codes (P0010-P0351)