Engine Control System (Diagnostic Codes) (P0010-P0420): Diagnosis Toyota Yaris II рестайлинг

INSPECTION PROCEDURE

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 DTC (OPERATE OCV) Connect a Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear DTCs after recording the freeze frame data and DTCs. Start the engine. Allow the engine to idle and check for DTCs. Check that P0010 is present. OK P0010 is present. NG --> See step 6 OK: Go to next step
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disconnect the C24 OCV connector. Measure the resistance between the terminals of the OCV. Standard resistance 6.9 to 7.9 ohms at 20°C (68°F) Reconnect the OCV connector. NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (OCV - ECM) Disconnect the C24 OCV connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (check for open) Tester Connections Specified Conditions OC1+ (C24-1) - OC1+ (C20-100) Below 1 ohms OC1- (C24-2) - OC1- (C20-123) Standard resistance (check for short) Tester Connections Specified Conditions OC1+ (C24-1) or OC1+ (C20-100) - Body ground 10 kohms or higher OC1- (C24-2) or OC1- (C20-123) - Body ground Reconnect the OCV connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
5. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-394514-S06236369202011040800000)
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)

Note. 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 a Techstream. Freeze frame data record 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012) Connect a Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) 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 8 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. On the Techstream, enter the following menu: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Tester Operations Specified Conditions OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. OK No DTC output (No pending DTC output). NG --> See step 4 OK --> END
4. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN OR JUMPED TEETH) Remove the cylinder head cover. Turn the crankshaft pulley, and align its groove with the timing mark "0" on the timing chain cover. Check that the timing marks on the camshaft timing sprocket and camshaft timing gear are facing upward as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), then align the marks as above. OK Timing marks on camshaft timing gears are aligned as shown in the illustration. Reinstall the cylinder head cover. NG --> See step 9 OK: Go to next step
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV) Remove the OCV. Measure the resistance between the terminals of the OCV. Standard resistance 6.9 to 7.9 ohms at 20°C (68°F) Apply the battery voltage to terminal 1 and terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the OCV. NG --> See step 10 OK: Go to next step
6. INSPECT OIL CONTROL VALVE FILTER Remove the generator. Remove the OCV filter. Check that the filter is not clogged. OK Filter is not clogged. Reinstall the OCV filter. Reinstall the generator. NG --> CLEAN OIL CONTROL VALVE FILTER OK: Go to next step
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Replace the camshaft timing gear assembly. Refer to «REMOVAL»(ref-394510-S28676307752011040800000) . NEXT: Go to next step
8. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394513-S31071923012011040800000)
9. ADJUST VALVE TIMING. Refer to «REMOVAL»(ref-394510-S27608998362011040800000)
10. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-394514-S06236369202011040800000)
11. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read output DTCs using the Techstream. OK No DTC output (No pending DTC output). HINT: DTC P0011 or P0012 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. NG --> See step 12 OK --> END
12. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 a Techstream. Freeze frame data record 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 C23 A/F sensor connector. Measure the resistance of the A/F sensor connector. Standard resistance Tester Connections Specified Conditions HA1A (1) - +B (2) 1.8 ohms to 3.4 ohms at 20°C (68°F) HA1A (1) - A1A- (4) 10 kohms or higher Reconnect the A/F sensor connector. NG --> See step 6 OK: Go to next step
2. CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR) Disconnect the C23 A/F sensor connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the C23 A/F sensor connector and body ground. Standard voltage Tester Connections Specified Conditions +B (C23-2) - Body ground 11 to 14 V Reconnect the A/F sensor connector. OK --> See step 7 NG: Go to next step
3. INSPECT INTEGRATION RELAY (EFI RELAY) Remove the integration relay from the engine room relay block. Inspect the EFI fuse. Remove the EFI fuse from the integration relay. Measure the EFI fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI fuse. Inspect the EFI relay. Measure the EFI relay resistance. Standard resistance Tester Connections Specified Conditions 1C-1 - 1A-4 10 kohms or higher Below 1 ohms (Apply battery voltage between terminals 1A-2 and 1A-3) Reinstall the integration relay. NG --> REPLACE INTEGRATION RELAY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (A/F SENSOR - EFI RELAY) Disconnect the C23 A/F sensor connector. Remove the integration relay from the engine room Relay Block (R/B). Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions +B (C23-2) - Engine room R/B (1A-4) Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions +B (C23-2) or Engine room R/B (1A-4) - Body ground 10 kohms or higher Reconnect the A/F sensor connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
5. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-394517-S06537814052011040800000)
6. REPLACE AIR-FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394509-S27742410332011040800000)
7. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM) Disconnect the C23 A/F sensor connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions HA1A (C23-1) - HA1A (C20-109) Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions HA1A (C23-1) or HA1A (C20-109) - Body ground 10 kohms or higher Reconnect the A/F sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0031 OR P0032) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Display (DTC Output) Proceed To No output A P0031 or P0032 B B --> See step 10 A --> See step 9
9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 D28 Heated Oxygen (HO2) sensor connector. Measure the resistance of the HO2 sensor connector. Standard resistance Tester Connections Specified Conditions HT1B (1) - +B (2) 11 to 16 ohms at 20°C (68°F) HT1B (1) - E2 (4) 10 kohms or higher Reconnect the HO2 sensor connector. NG --> See step 6 OK: Go to next step
2. CHECK TERMINAL VOLTAGE (+B OF HO2 SENSOR) Disconnect the D28 HO2 sensor connector. Measure the voltage between the terminals of the D28 HO2 sensor connector and body ground. Standard voltage Tester Connections Specified Conditions +B (D28-2) - Body ground 11 to 14 V Reconnect the HO2 sensor connector. OK --> See step 7 NG: Go to next step
3. INSPECT INTEGRATION RELAY (EFI RELAY) See step 3 NG --> REPLACE INTEGRATION RELAY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (HO2 SENSOR - EFI RELAY) Disconnect the D28 HO2 sensor connector. Remove the integration relay from the engine room Relay Block (R/B). Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions +B (D28-2) - Engine room R/B (1A-4) Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions +B (D28-2) or Engine room R/B (1A-4) - Body ground 10 kohms or higher Reconnect the HO2 sensor connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
5. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-394517-S06537814052011040800000)
6. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)
7. CHECK HARNESS AND CONNECTOR (HO2 SENSOR - ECM) Disconnect the D28 HO2 sensor connector. Disconnect the C20 ECM connector. Measure the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions HT1B (D28-1) - HT1B (C20-47) Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions HT1B (D28-1) or HT1B (C20-47) - Body ground 10 kohms or higher Reconnect the HO2 sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038 AND/OR P0141) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Display (DTC Output) Proceed To No output (No pending DTC output) A P0037, P0038 and/or P0141 B B --> See step 10 A --> See step 9
9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 DTC OUTPUT Connect the Techstream to the DLC3. Turn the ignition switch and turn the Techstream on. Clear the DTCs. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Result Proceed To DTC P0100, P0102, and/or P0103 are output A DTC is not output B B --> See step 12 A: Go to next step
2. READ VALUE USING TECHSTREAM (MASS AIR FLOW RATE) Read the values using the Techstream (MAF). NOTE: Turn the ignition switch 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. Select the following the menus items: Powertrain / Engine and ECT / Data List / MAF. Wait for 30 seconds, and read the values on the Techstream. Result Result (gm/sec.) Proceed To Mass air flow rate is 0.0 A Mass air flow rate is 0.28 or more B B --> See step 7 A: Go to next step
3. INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE) Disconnect the C26 Mass Air Flow (MAF) meter connector. Turn the ignition switch to ON. Measure the voltage between the terminal of the wire harness side connector and body ground. Standard voltage Tester Connections Specified Conditions +B (C26-1) - Body ground 11 to 14 V Reconnect the MAF meter connector. NG --> See step 6 OK: Go to next step
4. INSPECT MASS AIR FLOW METER (VG VOLTAGE) Remove the MAF meter with the wire harness connector connected. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Select the following the menus items: 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 13 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the C26 MAF meter connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions VG (C26-3) - VG (C20-118) Below 1 ohms E2G (C26-2) - E2G (C20-116) Standard resistance (Check for short) Tester Connections Specified Conditions VG(C26-3) or VG (C20-118) - Body ground 10 kohms or higher Reconnect the MAF meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
6. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - INTEGRATION RELAY) Disconnect the C26 MAF meter connector. Remove the integration relay from the engine room Relay Block (R/B). Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions +B (C26-1) - 1A-4 Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions +B (C26-1) or 1A-4 - Body ground 10 kohms or higher Reconnect the MAF meter connector. Reinstall the integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
7. CHECK HARNESS AND CONNECTOR (SENSOR GROUND) Disconnect the C26 MAF meter connector. Check the resistance. Standard resistance Tester Connections Specified Conditions E2G (C26-2) - Body ground Below 1 ohms Reconnect the MAF meter connector. OK --> See step 14 NG: Go to next step
8. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the C26 MAF meter connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions VG (C26-3) - VG (C20-118) Below 1 ohms E2G (C26-2) - E2G (C20-116) Standard resistance (Check for short) Tester Connections Specified Conditions VG (C26-3) or VG (C20-118) - Body ground 10 kohms or higher Reconnect the MAF meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
9. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
10. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-394517-S06537814052011040800000)
11. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
12. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
13. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)
14. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 a Techstream. Freeze frame data record 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. READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect a 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 Techstream. OK Same as actual Intake Air Temperature (IAT). Result Temperature Displayed 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 Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream 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 C26 Mass Air Flow (MAF) meter connector. Connect terminals THA and 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 Techstream. Standard 140°C (284°F) or higher Reconnect the MAF meter connector. OK --> See step 5 NG: Go to next step
3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the C26 MAF meter connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions THA (C26-4) - THA (C20-65) Below 1 ohms E2 (C26-5) - ETHA (C20-88) Reconnect the MAF 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-394513-S06690205932011040800000)
5. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)
6. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
7. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the C26 MAF 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 Techstream. Standard -40°C (-40°F) Reconnect the MAF meter connector. OK --> See step 9 NG: Go to next step
8. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the C26 MAF meter connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions THA (C26-4) or THA (C20-65) - Body ground 10 kohms or higher Reconnect the MAF 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-394514-S32454279162011040800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

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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 see scheme 1
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.

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) Connect a 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 Techstream. Standard 75°C to 100°C (167°F to 212°F) with warm engine. Result Temperature Displayed Proceed To -40°C (-40°F) A 140°C (284°F) or higher B 75°C to 100°C (167°F to 212°F) C HINT: If there is an open circuit, the Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream indicates 140°C (284°F) 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 C19 Engine Coolant Temperature (ECT) sensor connector. Connect terminals 1 and 2 of the ECT 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 Techstream. Standard 140°C (284°F) or higher. Reconnect the ECT sensor connector. OK --> See step 5 NG: Go to next step
3. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the C19 ECT sensor connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions THW (C19-2) - THW (C20-97) Below 1 ohms E2 (C19-1) - ETHW (C20-96) Reconnect the ECT 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-394513-S06690205932011040800000)
5. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394514-S13475165592011040800000)
6. GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
7. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the C19 ECT 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 Techstream. Standard -40°C (-40°F) Reconnect the ECT sensor connector. OK --> See step 9 NG: Go to next step
8. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the C19 ECT sensor connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions THW (C19-2) or THW (C20-97) - Body ground 10 kohms or higher Reconnect the ECT 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-394514-S13475165592011040800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

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 a Techstream. Freeze frame data record 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 a Techstream. Freeze frame data record 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 77

Scheme 78

1. READ VALUE USING TECHSTREAM (THROTTLE POSITION NO. 1 AND THROTTLE POSITION NO. 2) Connect a Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / ETCS / Throttle Position No. 1 and Throttle Position No. 2. Check the values displayed on the Techstream. Result When Accelerator Pedal Released When Accelerator Pedal Depressed Trouble Areas Proceed to Throttle Position No. 1 Throttle Position No. 2 Throttle Position No. 1 Throttle Position No. 2 0 V to 0.2 V 0 V to 0.2 V 0 V to 0.2 V 0 V to 0.2 V VC circuit open A 4.5 V to 5.0 V 4.5 V to 5.0 V 4.5 V to 5.0 V 4.5 V to 5.0 V E2 circuit open 0 V to 0.2 V, or 4.5 V to 5.0 V 2.1 V to 3.1 V (Fail-safe) 0 V to 0.2 V, or 4.5 V 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 V to 0.2 V, or 4.5 V to 5.0 V 0.6 V to 1.4 V (Fail-safe) 0 V to 0.2 V, or 4.5 V to 5.0 V VTA2 circuit open or ground short 0.5 V to 1.1 V 2.1 V to 3.1 V 3.2 V to 4.8 V (Not fail-safe) 4.6 V to 5.0 V (Not fail-safe) TP sensor circuit normal B HINT: DTC P0121 is stored when the VTA1 and VTA2 output voltages are not consistent with the sensor characteristics. Therefore, check the freeze frame data when this DTC is stored. Use the following formula to confirm the relative differences in voltage. Characteristic Sensor Output VTA2 x 0.8 is approximately equal to VTA1 + 1.11 V VTA1: Throttle Position No. 1. VTA2: Throttle Position No. 2. If DTC P0121 is output, proceed to the "CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)" Step 2 . B --> See step 5 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the C17 throttle body connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions VC (C17-5) - VCTA (C20-67) Below 1 ohms VTA (C17-6) - VTA1 (C20-115) VTA2 (C17-4) - VTA2 (C20-114) E2 (C17-3) - ETA (C20-91) Standard resistance (Check for short) Tester Connections Specified Conditions VC (C17-5) or VCTA (C20-67) - Body ground 10 kohms or higher VTA (C17-6) or VTA1 (C20-115) - Body ground VTA2 (C17-4) or VTA2 (C20-114) - Body ground 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 C17 throttle body connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the throttle body connector. Standard voltage Tester Connections Specified Conditions VC (C17-5) - E2 (C17-3) 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 the Throttle body. Refer to «REMOVAL»(ref-394514-S36129749062011040800000) . 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 and turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Display (DTC Output) 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-394514-S02889335332011040800000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

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 a Techstream. Freeze frame data record 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 a Techstream. Freeze frame data record 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 a 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 Techstream.

HINT

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

Note. The Air-Fuel Ratio (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 79

Scheme 80

Scheme 81

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.

HINT

Read freeze frame data using a 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 82

Scheme 83

Scheme 84

Scheme 85

Scheme 86

1. READ OUTPUT DTC (DTC P0136, P0137, P0138 OR P0139) Connect a Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) 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 and 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 HO2 Sensor Output Voltages Proceed To 1.0 V or higher A Below 1.0 V B B --> See step 5 A: Go to next step
3. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the D28 HO2 sensor connector. Check the resistance. Standard resistance Tester Connections Specified Conditions +B (2) - E2 (4) 10 kohms or higher +B (2) - OX1B (3) Reconnect the HO2 sensor connector. NG --> See step 23 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions HT1B (C20-47) - OX1B (C20-64) 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. Start the engine and turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream, monitoring the voltage output of Air-Fuel Ratio (A/F) and 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 0.1 or 0.2 % 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. Result Tester Display (Sensor) Voltage Variations 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. CHECK AIR-FUEL RATIO SENSOR CURRENT 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. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Drive the vehicle by the drive pattern as listed below: Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or more. Drive the vehicle at 40 mph (60 km/h) or more and decelerate the vehicle for 5 seconds or more. Repeat the deceleration above at least 3 times. Enter the following menus: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details. Confirm that RANGE B1S1 is either Pass or Fail. If the Techstream shows Incomplete, re-check RANGE B1S1 after performing the drive pattern. Select the RANGE B1S1. Read the Test Value. Standard current Less than 3.0 mA HINT: If the Techstream shows Incomplete again, increase the vehicle speed and use the second gear to decelerate the vehicle. 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. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the ignition switch to ON and 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 / 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 0.1 or 0.2% 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 Fluctuates between 0.4 V or less and 0.55 V or more. NG --> See step 9 OK: Go to next step
8. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream, monitoring the voltage output of Air-Fuel Ratio (A/F) and 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 0.1 or 0.2 % 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. Result Tester Display (Sensor) Voltage Variations 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 --> See step 25
9. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leak. OK No gas leak. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT 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 D28 HO2 sensor connector. Turn the ignition switch to ON. Measure the voltage between the +B terminal of the HO2 sensor connector and body ground. Standard voltage Tester Connections Specified Conditions +B (D28-2) - Body ground 11 to 14 V Turn the ignition switch off. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions HT1B (D28-1) - HT1B (C20-47) Below 1 ohms OX1B (D28-3) - OX1B (C20-64) E2 (D28-4) - EX1B (C20-87) Standard resistance (Check for short) Tester Connections Specified Conditions HT1B (D28-1) or HT1B (C20-47) - Body ground 10 kohms or higher OX1B (D28-3) or OX1B (C20-64) - Body ground E2 (D28-4) or EX1B (C20-87) - Body ground Reconnect the HO2 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-394509-S23296153522011040800000) . NEXT: Go to next step
13. PERFORM CONFIRMATION DRIVING PATTERN Perform the Confirmation Driving Pattern (P0136, P0137 and P0138). NEXT: Go to next step
14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine 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 Display (DTC Output) Proceed To ABNORMAL (P0136, P0137 or P0138 detected) A NORMAL (No DTC output) B B --> END A --> See step 27
15. REPLACE AIR-FUEL RATIO SENSOR Replace the air-fuel ratio sensor. Refer to «REMOVAL»(ref-394509-S27742410332011040800000) . NEXT: Go to next step
16. PERFORM CONFIRMATION DRIVING PATTERN Perform the Confirmation Driving Pattern (P0136, P0137 and P0138). NEXT: Go to next step
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137 OR P0138) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine 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 Display (DTC Output) Proceed To ABNORMAL (P0136, P0137 or P0138 detected) A NORMAL (No DTC output) B B --> END A --> See step 28
18. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) 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 / 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 HO2 Sensor Output Voltages 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 D28 HO2 sensor connector. Check the resistance. Standard resistance Tester Connections Specified Conditions +B (2) - E2 (4) 10 kohms or higher +B (2) - OX1B (3) Reconnect the HO2 sensor connector. NG --> See step 29 OK: Go to next step
20. CHECK HARNESS OR CONNECTOR (CHECK FOR SHORT) Turn the ignition switch off and wait for 5 minutes. Disconnect the C20 ECM connector. Check the resistance. Standard resistance Tester Connections Specified Conditions HT1B (C20-47) - OX1B (C20-64) 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 30
21. PERFORM CONFIRMATION DRIVING PATTERN Perform the Confirmation Driving Pattern (P0139). NEXT: Go to next step
22. CHECK DTC OUTPUT Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Perform confirmation driving pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input DTCs: P0139. Check the DTC monitor is NORMAL. If DTC monitor is INCOMPLETE, perform the drive pattern increasing the vehicle speed and using the second gear to decelerate the vehicle. Result Display (DTC Output) Proceed To ABNORMAL (P0139) A NORMAL (No DTC output) B B --> See step 31 A --> See step 32
23. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)
24. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
25. CHECK AND REPAIR EXTREMELY RICH OR LEAN ACTUAL AIR-FUEL RATIO (INJECTOR, FUEL PRESSURE, GAS LEAK FROM EXHAUST SYSTEM, ETC.). Refer to «INSPECTION PROCEDURE»(ref-394516-S27277905762011040800000)
26. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)
27. REPLACE AIR-FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394509-S27742410332011040800000)
28. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)
29. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)
30. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
31. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
32. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-394509-S23296153522011040800000)

HINT

1. Read freeze frame data using a Techstream. Freeze frame data record 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 87

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171 OR P0172) Connect a Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) 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 19 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394523-S35148983412011040800000) . 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. 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 Voltage B1S1 and O2S B1S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard Tester Display (Sensor) Injection Volume Status Voltage AFS Voltage 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 Voltage 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 and 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 With cold engine: Same as ambient air temperature. With warm engine: 75°C to 100°C (167°F to 212°F). NG --> See step 21 OK: Go to next step
6. READ VALUE USING TECHSTREAM (MAF) Read the values using the Techstream (MAF). NOTE: Turn the ignition switch 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 an exhaust air duct to apply suction to the exhaust pipe. Connect the Techstream to the DLC3. Turn the ignition switch 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 Techstream. Standard value Less than 0.28 g/sec Inspect the mass air flow meter. Remove the mass air flow meter. Refer to «REMOVAL»(ref-394514-S32454279162011040800000) . 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-394514-S21363025782011040800000) . NG --> See step 20 OK: Go to next step
7. CHECK FOR SPARKS AND IGNITION See step 8 NG --> REPAIR OR REPLACE IGNITION SYSTEM OK: Go to next step
8. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leak. OK No gas leak. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
9. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394526-S22938223372011040800000) . Standard 304 to 343 kPa (3.1 to 3.5 kgf/cm 2 , 44.1 to 49.7 psi) NG --> REPAIR OR REPLACE FUEL SYSTEM OK: Go to next step
10. INSPECT FUEL INJECTOR (INJECTION AND VOLUME) Check the injection volume. Refer to «INSPECTION - Step 1»(ref-394522-S13876516432011040800000) . Standard 45 to 58 cm 3 (2.9 to 3.5 cu in.) per 15 seconds NG --> See step 22 OK --> See step 15
11. INSPECT AIR-FUEL RATIO SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 23 OK: Go to next step
12. CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR) See step 2 NG --> See step 18 OK: Go to next step
13. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM). Refer to «PROCEDURE - Step 11»(ref-394517-S01864082272011040800000) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
14. REPLACE AIR-FUEL RATIO SENSOR Replace the A/F sensor. Refer to «REMOVAL»(ref-394509-S27742410332011040800000) . NEXT: Go to next step
15. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Turn the ignition switch off. Turn the ignition switch ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0171 or P0172. Check the DTC judgment result. Result Display (DTC Output) Proceed To ABNORMAL (DTC P0171 or P0172 is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
16. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000) . NEXT: Go to next step
17. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Turn the ignition switch off. Turn the ignition switch ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0171 or P0172. Check the DTC judgment result. Tester Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
18. CHECK HARNESS AND CONNECTOR (A/F SENSOR - INTEGRATION RELAY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 24
19. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394513-S31071923012011040800000)
20. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)
21. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394514-S13475165592011040800000)
22. REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-394522-S15591188762011040800000)
23. REPLACE AIR-FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394509-S27742410332011040800000)
24. REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to «INSPECTION PROCEDURE»(ref-394517-S19239866592011040800000)

Scheme 88

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high HC concentration levels can cause increases in exhaust emission levels. 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 these increases 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 as when the crankshaft rotation speed variations exceed predetermined thresholds.

If the misfire rate exceeds the threshold level, and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

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 a 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, the following factors are possible causes of the problem: There is insufficient fuel in the tank. Improper fuel is used. The spark plugs are contaminated. The problem requires further diagnosis.
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 misfires have occurred only while warming up the engine.
9. An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

Scheme 89

Scheme 90

Scheme 91

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS) Connect a 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 Display (DTC Output) 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 34 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connection. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394523-S35148983412011040800000) . OK PCV hose is connected correctly and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Misfire / Misfire RPM and Misfire Load. Read and note the Misfire RPM and Misfire Load values. HINT: The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred. NEXT: Go to next step
4. READ VALUE USING TECHSTREAM (CATALYST OT MF F/C) Connect a Techstream to the DLC3. Turn the ignition switch 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 Techstream. 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 F/C) Connect a Techstream to the DLC3. Turn the ignition switch 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 / Misfire / 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 Techstream. If no misfire counts occur in any cylinders, perform steps (d) and (e) and then check the misfire counts again. Drive the vehicle with the Misfire RPM and Misfire Load noted in the READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) 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 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 19 A: Go to next step
7. INSPECT SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Standard 1.0 to 1.1 mm (0.039 to 0.043 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufactures Products DENSO SK16R11 NGK IFR5A11 NOTE: If the electrode gap is out of standard, replace the spark plug. Do not adjust the electrode gap. NG --> REPLACE SPARK PLUG OK: Go to next step
8. CHECK FOR SPARKS AND IGNITION Disconnect the injector connectors, in order to prevent the engine from starting. WARNING: Always disconnect all injector connectors. 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. Reconnect the injector connectors. NG --> See step 31 OK: Go to next step
9. CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 8»(ref-394510-S26623091532011040800000) . 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 C20 ECM connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the ECM connector. Standard voltage Tester Connections Specified Conditions #10 (C20-108) - E01 (C20-45) 11 to 14 V #20 (C20-107) - E01 (C20-45) #30 (C20-106) - E01 (C20-45) #40 (C20-105) - E01 (C20-45) Reconnect the ECM connector. NG --> See step 35 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»(ref-394522-S23723046912011040800000) . NG --> See step 36 OK: Go to next step
12. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leak. OK No leak from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
13. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394526-S22938223372011040800000) . NG --> See step 33 OK: Go to next step
14. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 38 OK: Go to next step
15. READ VALUE USING TECHSTREAM (MAF) See step 6 NG --> See step 39 OK: Go to next step
16. CHECK VALVE TIMING See step 4 NG --> See step 37 OK: Go to next step
17. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000) . NEXT: Go to next step
18. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Clear DTC. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Turn the ignition switch off. Turn the ignition switch ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303 or P0304. Check the DTC judgment result. Tester Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
19. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leak. OK No leak from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
20. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-394526-S22938223372011040800000) . NG --> See step 33 OK: Go to next step
21. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 5 NG --> See step 41 OK: Go to next step
22. READ VALUE USING TECHSTREAM (MAF) See step 6 NG --> See step 42 OK: Go to next step
23. CHECK VALVE TIMING See step 4 NG --> See step 40 OK: Go to next step
24. INSPECT SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Standard 1.0 to 1.1 mm (0.039 to 0.043 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufactures Products DENSO SK16R11 NGK IFR5A11 NOTE: If the electrode gap is out of standard, replace the spark plug. Do not adjust the electrode gap. NG --> REPLACE SPARK PLUG OK: Go to next step
25. CHECK FOR SPARKS AND IGNITION Disconnect the injector connectors, in order to prevent the engine from starting. WARNING: Always disconnect all injector connectors. 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. Reconnect the injector connectors. NG --> See step 31 OK: Go to next step
26. CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRE CYLINDER Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 8»(ref-394510-S26623091532011040800000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
27. INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30, AND /OR #40 VOLTAGE) Disconnect the C20 ECM connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the ECM connector. Standard voltage Tester Connections Specified Conditions #10 (C20-108) - E01 (C20-45) 11 to 14 V #20 (C20-107) - E01 (C20-45) #30 (C20-106) - E01 (C20-45) #40 (C20-105) - E01 (C20-45) Reconnect the ECM connector. NG --> See step 43 OK: Go to next step
28. 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-394522-S13876516432011040800000) . NG --> See step 44 OK: Go to next step
29. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000) . NEXT: Go to next step
30. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Clear DTC. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Turn the ignition switch off. Turn the ignition switch ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303 or P0304. Check the DTC judgment result. Tester Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
31. 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. 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. NOTE: Do not crank the engine for more than 2 seconds. OK Sparks jump across electrode gap. NG --> See step 32 OK --> REPLACE SPARK PLUG
32. 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. 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. NOTE: Do not crank the engine for more than 2 seconds. OK Sparks jump across electrode gap. NG --> See step 45 OK --> See step 46
33. CHECK FUEL LINE Check the fuel lines for leaks or blockage. NG --> REPAIR OR REPLACE FUEL LINE OK --> See step 47
34. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394513-S31071923012011040800000)
35. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-394517-S23476557162011040800000)
36. REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-394522-S15591188762011040800000)
37. ADJUST VALVE TIMING. Refer to «REMOVAL»(ref-394510-S27608998362011040800000)
38. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394514-S13475165592011040800000)
39. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)
40. ADJUST VALVE TIMING. Refer to «REMOVAL»(ref-394510-S27608998362011040800000)
41. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-394514-S13475165592011040800000)
42. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-394514-S32454279162011040800000)
43. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-394517-S23476557162011040800000)
44. REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-394522-S15591188762011040800000)
45. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
46. REPLACE IGNITION COIL. Refer to «PARTS LOCATION»(ref-394506-S38718626882011040800000)
47. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-394522-S39993543732011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 92

Scheme 93

Scheme 94

1. READ VALUE USING TECHSTREAM (KNOCK FEEDBACK VALUE) Connect a Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / All Data / Knock Feedback Value. Read the values displayed on the Techstream while driving the vehicle. OK The values change. HINT Malfunction does not occur Knock Feedback Values change Malfunctions occur Knock Feedback Values do not change HINT: The knock feedback value change can be confirmed by running the engine at high load, for example, by activating the air conditioning system and revving the engine. OK --> See step 5 NG: Go to next step
2. CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR) Disconnect the C20 ECM connector. Measure the resistance between the terminals. Standard resistance Tester Connections Specified Conditions KNK1 (C20-110) - EKNK (C20-111) 120 to 280 kohms at 20°C (68°F) Reconnect the ECM connector. NG --> See step 4 OK: Go to next step
3. INSPECT ECM (KNK1 VOLTAGE) Disconnect the P1 knock sensor connector. Turn the ignition switch to ON. Measure the voltage between the knock sensor terminals. Standard voltage Tester Connections Specified Conditions KNK1 (P1-2) - EKNK (P1-1) 4.5 to 5.5 V Reconnect the knock sensor connector. NOTE: Fault may be intermittent. Check the wire harness and connectors carefully and retest. NG --> See step 6 OK --> See step 7
4. INSPECT KNOCK SENSOR Remove the knock sensor. Measure the resistance between the terminals. Standard resistance Tester Connections Specified Conditions KNK1 (2) - EKNK (1) 120 to 280 kohms at 20°C (68°F) Reinstall the knock sensor. NG --> See step 8 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - KNOCK SENSOR)
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394513-S06690205932011040800000)
8. REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-394514-S04917849802011040800000)

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 a 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 record 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 95

Scheme 96

Scheme 97

1. READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect a 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 Techstream while the engine is running. OK Correct values are displayed. HINT: To check the engine speed change, display the graph on the Techstream. If the engine does not start, check the engine speed while cranking. If the engine speed indicated on the Techstream remains zero (0), there may be an open or short in the Crankshaft Position (CKP) sensor circuit. OK --> See step 8 NG: Go to next step
2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) Disconnect the C2 CKP sensor connector. Measure the resistance between terminals 1 and 2. Standard resistance Tester Connections Specified Conditions 1 - 2 1150 to 1450 ohms at 25°C (77°F) Reconnect the CKP sensor connector. NG --> See step 9 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the C2 CKP sensor connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions NE+ (C2-1) - NE+ (C20-122) Below 1 ohms NE- (C2-2) - NE- (C20-121) Standard resistance (Check for short) Tester Connections Specified Conditions NE+ (C2-1) or NE+ (C20-122) - Body ground 10 kohms or higher NE- (C2-2) or NE- (C20-121) - Body ground Reconnect the ECM connector. Reconnect the CKP sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Check the CKP sensor installation. OK Sensor is installed correctly. NG --> See step 10 OK: Go to next step
5. INSPECT CRANKSHAFT (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 the crankshaft position sensor. Refer to «REMOVAL»(ref-394514-S09722134022011040800000) . NEXT: Go to next step
7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0335 OR P0339) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Display (DTC Output) 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-394513-S06690205932011040800000)
9. REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-394514-S09722134022011040800000)
10. SECURELY REINSTALL SENSOR. Refer to «INSTALLATION - Step 1»(ref-394514-S30512036802011040800000)
11. REPLACE CRANKSHAFT. Refer to «DISASSEMBLY»(ref-394510-S17893138572011040800000)
12. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 98

Scheme 99

Scheme 100

1. INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE) Disconnect the C18 Camshaft Position (CMP) sensor connector. Measure the resistance between terminals 1 and 2. Standard resistance Tester Connections Specified Conditions 1 - 2 1850 to 2450 ohms at 20°C (68°F) Reconnect the CMP sensor connector. NG --> See step 8 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Disconnect the C18 CMP sensor connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions G2+ (C18-1) - G2+ (C20-99) Below 1 ohms NE- (C18-2) - NE- (C20-121) Standard resistance (Check for short) Tester Connections Specified Conditions G2+ (C18-1) or G2+ (C20-99) - Body ground 10 kohms or higher NE- (C18-2) or NE- (C20-121) - Body ground Reconnect the ECM connector. Reconnect the CMP sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR) Check the CMP sensor installation. OK Sensor is installed correctly. NG --> See step 9 OK: Go to next step
4. CHECK VALVE TIMING See step 4 NG --> See step 10 OK: Go to next step
5. CHECK CAMSHAFT (TIMING ROTOR) Check the timing rotor of the camshaft. OK Camshaft timing rotor does not have any cracks or deformation. NG --> See step 11 OK: Go to next step
6. REPLACE CAMSHAFT POSITION SENSOR Replace the camshaft. Refer to «REMOVAL»(ref-394514-S33131999002011040800000) . NEXT: Go to next step
7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs. Result Display (DTC Output) Proceed To No output A P0340 B HINT: If the engine does not start, replace the ECM. B --> See step 12 A --> END
8. REPLACE CAMSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-394514-S33131999002011040800000)
9. SECURELY REINSTALL SENSOR. Refer to «INSTALLATION - Step 1»(ref-394514-S07661143422011040800000)
10. ADJUST VALVE TIMING. Refer to «REMOVAL»(ref-394510-S27608998362011040800000)
11. REPLACE CAMSHAFT. Refer to «REMOVAL»(ref-394510-S28676307752011040800000)
12. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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 101

Scheme 102

1. INSPECT IGNITION COIL (POWER SOURCE) Disconnect the ignition coil connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions GND (C11-4) - Body ground Below 1 ohms GND (C12-4) - Body ground GND (C13-4) - Body ground GND (C14-4) - Body ground Turn the ignition switch to ON. Measure the voltage between the terminals of the wire harness side connector. Standard voltage Tester Connections Specified Conditions +B (C11-1) - GND (C11-4) 11 to 14 V +B (C12-1) - GND (C12-4) +B (C13-1) - GND (C13-4) +B (C14-1) - GND (C14-4) Reconnect the ignition coil connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) Disconnect the ignition coil connector. Disconnect the C20 ECM connector. Check the resistance. Standard resistance (Check for open) Tester Connections Specified Conditions IGF (C11-2) - IGF1 (C20-81) Below 1 ohms IGF (C12-2) - IGF1 (C20-81) IGF (C13-2) - IGF1 (C20-81) IGF (C14-2) - IGF1 (C20-81) Standard resistance (Check for open) Tester Connections Specified Conditions IGT (C11-3) - IGT1 (C20-85) Below 1 ohms IGT2 (C12-3) - IGT2 (C20-84) IGT3 (C13-3) - IGT3 (C20-83) IGT4 (C14-3) - IGT4 (C20-82) Standard resistance (Check for short) Tester Connections Specified Conditions IGF (C11-2) or IGF1 (C20-81) - Body ground 10 kohms or higher IGF (C12-2) or IGF1 (C20-81) - Body ground IGF (C13-2) or IGF1 (C20-81) - Body ground IGF (C14-2) or IGF1 (C20-81) - Body ground Standard resistance (Check for short) Tester Connections Specified Conditions IGT (C11-3) or IGT1 (C20-85) - Body ground 10 kohms or higher IGT2 (C12-3) or IGT2 (C20-84) - Body ground IGT3 (C13-3) or IGT3 (C20-83) - Body ground IGT4 (C14-3) or IGT4 (C20-82) - Body ground Reconnect the ECM connector. Reconnect the ignition coil connector. 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 and turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-394513-S17742279252011040800000) . Shuffle arrangement of the ignition coils (among No. 1 to No. 4 cylinders). NOTE: Do not shuffle the connectors. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Check DTCs displayed on the Techstream. Result Display (DTC Output) Proceed To Same DTC output A Different ignition coil DTC output B B --> See step 4 A --> See step 5
4. REPLACE IGNITION COIL. Refer to «PARTS LOCATION»(ref-394506-S38718626882011040800000)
5. REPLACE ECM. Refer to «REMOVAL»(ref-394514-S02889335332011040800000)

CONDITIONING FOR SENSOR TESTING

HINT

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the A/F and HO2 sensors. This is in order to activate the sensors sufficiently to obtain the appropriate inspection results.

Scheme 103

1. (a) Connect the Techstream to the DLC3.
2. (b) Start the engine and warm it up with all the accessories switched OFF, until the engine coolant temperature stabilizes.
3. (c) Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes.
4. (d) While running the engine at 3000 rpm and 2000 rpm alternating at 2 second intervals, check the waveforms of the A/F and HO2 sensors using the Techstream.

HINT

1. If either voltage output of the Air-Fuel Ratio (A/F) or Heated Oxygen (HO2) sensor does not fluctuate, or there is a noise in the waveform of either sensor the sensor may be malfunctioning.
2. If the voltage outputs of both the sensors remain lean or rich, the air-fuel ratio may be extremely lean or rich. In such cases, perform the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F sensor.
3. If the Three-Way Catalytic Converter (TWC) has deteriorated, the HO2 sensor (located behind the TWC) voltage output fluctuates up and down frequently, even under normal driving conditions (active air-fuel ratio control is not performed).

Scheme 104

HINT

Read freeze frame data using a Techstream. Freeze frame data record 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.