Engine Control System (2GR-FE) (P0010-P0443) (Diagnostic Codes): Diagnosis Toyota RAV4 IV

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

Scheme 461

Scheme 462

1. CHECK DTC Clear DTCs after recording the freeze frame data and DTCs. Turn the ignition switch off. Allow the engine to idle and check for DTCs. Check that P0010 or P0020 is present. OK P0010 or P0020 is present. NG --> See step 6 OK: Go to next step
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disconnect the B44 or B60 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 WIRE HARNESS (OCV - ECM) Disconnect the B44 or B60 OCV connector. Disconnect the B30 ECM connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition B60-1 - B30-58 (OC1+) Below 1 ohms B44-1 - B30-52 (OC2+) Below 1 ohms B60-2 - B30-57 (OC1-) Below 1 ohms B44-2 - B30-51 (OC2-) Below 1 ohms B60-1 or B30-58 (OC1+) - Body ground 10 kohms or higher B44-1 or B30-52 (OC2+) - Body ground 10 kohms or higher B60-2 or B30-57 (OC1-) - Body ground 10 kohms or higher B44-2 or B30-51 (OC2-) - Body ground 10 kohms or higher 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-493466-S41904497902012081000000)
5. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-493466-S01432846022012081000000)
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)

HINT

DTC P0011, P0012, P0021 or P0022 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

1. If DTC P0011 or P0012 is displayed, check the right bank VVT system for intake camshaft circuit (bank 1).
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. If DTC P0021 or P0022 is displayed, check the left bank VVT system for intake camshaft circuit (bank 2).
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
5. 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 463

Scheme 464

Scheme 465

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read DTCs. Result Display (DTC Output) Proceed to P0011, P0012, P0021 or P0022 A P0011, P0012, P0021 or P0022 and other DTCs B HINT: If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first. B --> See step 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, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read DTCs using the Techstream. OK No DTC output. NG --> See step 4 OK --> END
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Remove the cylinder head cover RH and LH. 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 gears are aligned with the timing marks of the bearing cap as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), and 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 RH and LH. NG --> ADJUST VALVE TIMING 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 positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the OCV. NG --> See step 9 OK: Go to next step
6. INSPECT OIL CONTROL VALVE FILTER AND PIPE Remove the oil pipe No. 1 or No. 2. Remove the OCV filter. Check that the filter and pipe are not clogged. OK The filter and pipe are not clogged. Reinstall the OCV filter. Reinstall the oil pipe No. 1 or No. 2. NG --> REPLACE OIL CONTROL VALVE FILTER AND PIPE OK: Go to next step
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Replace the camshaft timing gear assembly.Refer to «REMOVAL»(ref-493421-S16468396402012081000000) . NEXT: Go to next step
8. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
9. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-493466-S01432846022012081000000)
10. CHECK WHETHER DTC OUTPUT RECURS 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-493460-S06003279822012081000000) . Start the engine and warm it up. 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. HINT: DTC P0011, P0012, P0021 or P0022 is output when foreign objects in the engine oil are caught in some parts of the system. These codes will remain set 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. OK --> SYSTEM OK NG --> See step 11
11. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. If DTC P0013 is displayed, check the bank 1 VVT system for exhaust camshaft circuit.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. If DTC P0023 is displayed, check the bank 2 VVT system for exhaust camshaft circuit.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
5. 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 466

1. CHECK DTC (DTC P0013 OR P0023) Connect the Techstream to the DLC3. Clear DTCs after recording the freeze frame data and DTCs. Turn the ignition switch off. Allow the engine to idle and check DTCs. Check that P0013 or P0023 is present. OK P0013 or P0023 is present. NG --> See step 4 OK: Go to next step
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disconnect the B43 or B57 OCV connector. 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) Reconnect the OCV connector. NG --> See step 5 OK: Go to next step
3. CHECK WIRE HARNESS (OCV - ECM) Disconnect the B43 or B57 OCV connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B57-1 - B30-56 (OE1+) Below 1 ohms B57-2 - B30-55 (OE1-) Below 1 ohms B43-1 - B30-50 (OE2+) Below 1 ohms B43-2 - B30-49 (OE2-) Below 1 ohms B57-1 or B30-56 (OE1+) - Body ground 10 kohms or higher B57-2 or B30-55 (OE1-) - Body ground 10 kohms or higher B43-1 or B30-50 (OE2+) - Body ground 10 kohms or higher B43-2 or B30-49 (OE2-) - Body ground 10 kohms or higher Reconnect the OCV 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-493460-S14877818602012081000000)
5. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-493466-S01432846022012081000000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

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

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. Sensor 1 refers to the sensor closest to the engine assembly.
5. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 467

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 OR P0018) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P0016 or P0018 A P0016 or P0018 and other DTCs B HINT: If any DTCs other than P0016 or P0018 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OIL CONTROL VALVE FOR INTAKE CAMSHAFT) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the oil control valve using the Techstream. OK Tester Operation Specified Condition OCV OFF Normal engine idle 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 P0016 OR P0018) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Read the DTCs using the Techstream. OK No DTC output. NG --> See step 4 OK --> END
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Remove the cylinder head cover RH and LH. 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 gears are aligned with the timing marks of the bearing cap as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), and 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 RH and LH. NG --> See step 10 OK: Go to next step
5. INSPECT CAM TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the intake camshaft timing oil control valve. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Apply positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve. NG --> See step 11 OK: Go to next step
6. CHECK OIL PIPE AND OIL CONTROL VALVE FILTER Remove the oil pipe No. 1 or No. 2. Remove the OCV filter. Check that the filter and pipe are not clogged. OK The filter and pipe are not clogged. Reinstall the OCV filter. Reinstall the oil pipe No. 1 or No. 2. NG --> See step 12 OK: Go to next step
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Replace the camshaft timing gear assembly.Refer to «DISASSEMBLY»(ref-493421-S08649880082012081000000) . NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Confirm that no DTC is set using the Techstream. OK No DTC output. HINT: DTC P0016 or P0018 is output when foreign objects in the engine oil are caught in some parts of the system. These codes will stay output even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. NG --> See step 13 OK --> END
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
10. ADJUST VALVE TIMING. Refer to «INSTALLATION»(ref-493421-S03366592892012081000000)
11. REPLACE CAM TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-493466-S01432846022012081000000)
12. REPLACE OIL PIPE AND OIL CONTROL VALVE FILTER. Refer to «REASSEMBLY»(ref-493421-S25714332312012081000000)
13. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. Sensor 1 refers to the sensor closest to the engine assembly.
5. Sensor 2 refers to the sensor farthest away from the engine assembly.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. Sensor 1 refers to the sensor closest to the engine assembly.
5. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 468

Scheme 469

Scheme 470

Scheme 471

Scheme 472

1. INSPECT AIR-FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the B33 or B48 A/F sensor connector. Measure the resistance of the A/F sensor connector. Standard resistance BANK 1 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 Standard resistance BANK 2 Tester Connection Condition Specified Condition 1 (HA2A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA2A) - 4 (A2A-) Always 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 B33 or B48 A/F sensor connector. Turn the ignition switch to ON. Measure the voltage between the terminal of the B33 or B48 A/F sensor connector and body ground. Standard voltage Tester Connection Specified Condition B33-2 (+B) - Body ground 11 to 14 V B48-2 (+B) - 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 (A/F RELAY) Remove the integration relay from the engine room No. 1 relay block. Inspect the A/F fuse. Remove the A/F fuse from the integration relay. Measure the A/F fuse resistance. Standard resistance Below 1 ohms Reinstall the A/F fuse. Inspect the A/F relay. Measure the A/F relay resistance. Standard resistance Tester Connection Specified Condition 1C-1 - 1B-8 10 kohms or higher Below 1 ohms (Battery voltage applied to terminals 1B-6 and 1B-7) Reinstall the integration relay. NG --> REPLACE INTEGRATION RELAY OK: Go to next step
4. CHECK WIRE HARNESS (INTEGRATION RELAY - A/F SENSOR AND BODY GROUND) Check the EFI No. 2 fuse. Disconnect the B33 or B48 A/F sensor connector. Remove the integration relay from the engine room No. 1 relay block. Measure the resistance. Standard resistance Tester Connection Specified Condition B48-2 (+B) - 1B-8 Below 1 ohms B33-2 (+B) - 1B-8 Below 1 ohms 1A-4 - 1B-6 Below 1 ohms 1B-7 - Body ground Below 1 ohms B48-2 (+B) or 1B-8 - Body ground 10 kohms or higher B33-2 (+B) or 1B-8 - Body ground 10 kohms or higher 1A-4 or 1B-6 - 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-493463-S18863697402012081000000)
6. REPLACE AIR-FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-493427-S03761156882012081000000)
7. CHECK WIRE HARNESS (A/F SENSOR - ECM) Disconnect the B33 or B48 A/F sensor connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B48-1 (HA1A) - B30-22 (HA1A) Below 1 ohms B33-1 (HA2A) - B30-20 (HA2A) Below 1 ohms B48-1 (HA1A) or B30-22 (HA1A) - Body ground 10 kohms or higher B33-1 (HA2A) or B30-20 (HA2A) - 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 Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the tester ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to No output A P0031, P0032, P0051 or P0052 B B --> See step 10 A --> See step 9
9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. Sensor 2 refers to the sensor mounted behind the Three-Way Catalytic Converter (TWC) and located far from the engine assembly.
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. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
5. Sensor 1 refers to the sensor closest to the engine assembly.
6. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 473

Scheme 474

Scheme 475

Scheme 476

Scheme 477

1. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the E35 or B19 Heated Oxygen (HO2) sensor connector. Measure the resistance of the HO2 sensor connector. Standard resistance BANK 1 Tester Connection Specified Condition 2 (HT1B) - 1 (+B) 11 to 16 ohms at 20°C (68°F) 2 (HT1B) - 3 (E2) 10 kohms or higher Standard resistance BANK 2 Tester Connection Specified Condition 1 (HT2B) - 2 (+B) 11 to 16 ohms at 20°C (68°F) 1 (HT2B) - 4 (E2) 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 E35 or B19 HO2 sensor connector. Turn the ignition switch to ON. Measure the voltage between the terminal of the E35 or B19 HO2 sensor connector and body ground. Standard voltage Tester Connection Specified Condition E35-1 (+B) - Body ground 11 to 14 V B19-2 (+B) - 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 MAIN RELAY) Remove the integration relay from the engine room No. 1 relay block. Inspect the EFI MAIN fuse. Remove the EFI MAIN fuse from the integration relay. Measure the EFI MAIN fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI MAIN fuse Inspect the EFI MAIN relay. Measure the EFI MAIN relay resistance. Standard resistance Tester Connection Specified Condition 1C-1 - 1A-4 10 kohms or higher Below 1 ohms (Battery voltage applied to terminals 1A-2 and 1A-3) Reinstall the integration relay. NG --> REPLACE INTEGRATION RELAY OK: Go to next step
4. CHECK WIRE HARNESS (HO2 SENSOR - EFI RELAY) Check the EFI No. 1 fuse. Disconnect the E35 or B19 HO2 sensor connector. Remove the integration relay from the engine room No. 1 relay block. Measure the resistance. Standard resistance Tester Connection Specified Condition E35-1 (+B) - 1A-4 Below 1 ohms B19-2 (+B) - 1A-4 Below 1 ohms E35-1 (+B) or 1A-4 - Body ground 10 kohms or higher B19-2 (+B) or 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-493463-S18863697402012081000000)
6. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)
7. CHECK WIRE HARNESS (HO2 SENSOR - ECM) Disconnect the E35 or B19 HO2 sensor connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition E35-2 (HT1B) - B30-45 (HT1B) Below 1 ohms B19-1 (HT2B) - B30-44 (HT2B) Below 1 ohms E35-2 (HT1B) or B30-45 (HT1B) - Body ground 10 kohms or higher B19-1 (HT2B) or B30-44 (HT2B) - 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 Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the tester ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to No output A P0037, P0038, P0057, P0058, P0141 and/or P0161 B B --> See step 10 A --> See step 9
9. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

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

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 478

Scheme 479

Scheme 480

Scheme 481

1. READ VALUE USING TECHSTREAM (MASS AIR FLOW RATE) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / MAF. Read the values displayed on the Techstream. Result Mass Air Flow Rate (gm/s.) Proceed to 0.0 A 160.0 or more B Between 1.0 and 160.0 (*1) C HINT: *1: The value must change when the throttle valve is open or closed with the engine running. B --> See step 10 C --> See step 5 A: Go to next step
2. INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE) Disconnect the B1 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 Connection Specified Condition B1-3 (+B) - Body ground 11 to 14 V Reconnect the MAF meter connector. NG --> See step 8 OK: Go to next step
3. INSPECT MASS AIR FLOW METER Inspect the mass air flow meter, referring to the Onvehicle Inspection for Mass Air Flow Meter.Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-493466-S39183723242012081000000) . NG --> See step 6 OK: Go to next step
4. CHECK WIRE HARNESS (MASS AIR FLOW METER - ECM) Disconnect the B1 MAF meter connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-5 (VG) - B30-74 (VG) Below 1 ohms B1-4 (E2G) - B30-75 (E2G) Below 1 ohms B1-5 (VG) or B30-74 (VG) - 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 7
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
6. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-493466-S37228417242012081000000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
8. CHECK WIRE HARNESS (MASS AIR FLOW METER - INTEGRATION RELAY) Check the EFI No. 1 fuse. Disconnect the B1 MAF meter connector. Remove the integration relay from the engine room No. 1 relay block. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-3 (+B) - 1A-4 Below 1 ohms B1-3 (+B) 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 9
9. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-493463-S18863697402012081000000)
10. CHECK WIRE HARNESS (SENSOR GROUND) Disconnect the B1 MAF meter connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-4 (E2G) - Body ground Below 1 ohms OK --> See step 12 NG: Go to next step
11. CHECK WIRE HARNESS (MASS AIR FLOW METER - ECM) Disconnect the B1 MAF meter connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-5 (VG) - B30-74 (VG) Below 1 ohms B1-4 (E2G) - B30-75 (E2G) Below 1 ohms B1-5 (VG) or B30-74 (VG) - 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 13
12. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-493466-S37228417242012081000000)
13. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

Scheme 482

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 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 483

Scheme 484

Scheme 485

Scheme 486

1. READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard 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 128°C (262°F) or higher. B --> See step 4 C --> See step 6 A: Go to next step
2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Disconnect the B1 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 tester ON. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard value 140°C (284°F) or higher Reconnect the MAF meter connector. NG --> See step 3 OK --> See step 7
3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B1 MAF meter connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-1 (THA) - B30-73 (THA) Below 1 ohms B1-2 (E2) - B30-98 (ETHA) Below 1 ohms Reconnect the MAF meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
4. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the B1 MAF meter connector. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air. Read the value displayed on the Techstream. Standard value -40°C (-40°F) Reconnect the MAF meter connector. NG --> See step 5 OK --> See step 9
5. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B1 MAF meter connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B1-1 (THA) or B30-73 (THA) - 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
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
7. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-493466-S37228417242012081000000)
8. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
9. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-493466-S37228417242012081000000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

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 487

Scheme 488

Scheme 489

Scheme 490

1. READ OUTPUT DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P0115 A P0117 B P0118 C B --> See step 8 C --> See step 3 A: Go to next step
2. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard value Between 80°C and 100°C (167°F and 212°F) with warm engine. Result Temperature Displayed 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 Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream indicates 140°C (284°F) or higher. B --> See step 8 C --> See step 5 A: Go to next step
3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Disconnect the B4 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. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard value 140°C (284°F) or higher. Reconnect the ECT sensor connector. OK --> See step 6 NG: Go to next step
4. CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the B4 ECT sensor connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B4-2 - B30-76 (THW) Below 1 ohms B4-1 - B30-97 (ETHW) Below 1 ohms Reconnect the ECT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
6. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493466-S10610308662012081000000)
7. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
8. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the B4 ECT sensor connector. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard value -40°C (-40°F) Reconnect the ECT sensor connector. OK --> See step 10 NG: Go to next step
9. CHECK WIRE HARNESS (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the B4 ECT sensor connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B4-2 or B30-76 (THW) - 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 11
10. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493466-S10610308662012081000000)
11. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. If DTC P0115, P0117, P0118 or P0125 is set simultaneously with DTC P0116, the ECT sensor may have an open or 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

1. These DTCs relate to the Throttle Position (TP) sensor.
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.

Scheme 491

Scheme 492

1. READ VALUE USING TECHSTREAM (THROTTLE POSITION No. 1 AND No. 2) 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. Check the values displayed on the Techstream. RESULT Throttle Position No. 1 (VTA1) When Accelerator Pedal Released Throttle Position No. 2 (VTA2) When Accelerator Pedal Released Throttle Position No. 1 (VTA1) When Accelerator Pedal Depressed Throttle Position No. 2 (VTA2) When Accelerator Pedal Depressed Trouble Area Proceed to 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 A 0 to 0.2 V, or 4.5 to 5.0 V 2.1 to 3.1 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 2.1 to 3.1 V (Fail-safe) VTA1 circuit open or ground short A 0.6 to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 0.6 to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V VTA2 circuit open or ground short A 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 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 "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 B3 throttle body connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B3-5 (VC) - B30-80 (VCTA) Below 1 ohms B3-6 (VTA) - B30-78 (VTA1) Below 1 ohms B3-4 (VTA2) - B30-77 (VTA2) Below 1 ohms B3-3 (E2) - B30-79 (ETA) Below 1 ohms B3-5 (VC) or B30-80 (VCTA) - Body ground 10 kohms or higher B3-6 (VTA) or B30-78 (VTA1) - Body ground 10 kohms or higher B3-4 (VTA2) or B30-77 (VTA2) - Body ground 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 B3 throttle body connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the throttle body connector. Standard voltage Tester Connection Specified Condition B3-5 (VC) - B3-3 (E2) 4.5 to 5.5 V Reconnect the throttle body connector. NG --> See step 6 OK: Go to next step
4. REPLACE THROTTLE BODY ASSEMBLY Replace the throttle body assembly.Refer to «REMOVAL»(ref-493466-S05114120172012081000000) . 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-493460-S06003279822012081000000) . Start the engine. Allow the engine to idle for 15 seconds or more. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P0120, P0121, P0122, P0123, P0220, P0222, P0223 and/or P2135 A No output B B --> SYSTEM OK A --> See step 7
6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. If DTC P0115, P0116, P0117 or P0118 is set simultaneously with DTC P0125, the Engine Coolant Temperature (ECT) sensor may have an open or 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

1. This DTC relates to the thermostat.
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

Sensor 2 refers to the sensor mounted behind the Three-Way Catalytic Converter (TWC) and located far from the engine assembly.

HINT

Techstream only

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.

1. The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream. Connect the Techstream to the DLC3. Start the engine and turn the Techstream ON. Warm up the engine at an engine speed of 2, 500 rpm for approximately 90 seconds. On the Techstream, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor. Perform the Control the Injection Volume for A/F Sensor operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2, or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

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

Standard

Note. The A/F sensor has an output delay of a few seconds and the 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 493

Scheme 494

Scheme 495

Scheme 496

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, select the following menu items on the Techstream: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F sensor / A/F Control System / AFS Voltage B1S1 or AFS Voltage B2S1, and O2S B1S2 or O2S B2S2. Then press the graph button on the Data List view.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. If the OX1B wire from the ECM connector is short-circuited to the +B wire, DTC P0138 will be set.
3. If the OX2B wire from the ECM connector is short-circuited to the +B wire, DTC P0158 will be set.
4. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
5. Bank 2 refers to the bank that does not include the No. 1 cylinder.
6. Sensor 1 refers to the sensor closest to the engine assembly.
7. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 497

Scheme 498

Scheme 499

Scheme 500

1. READ DTC OUTPUT 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 / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P0138 or P0158 A P0137 or P0157 B P0136 or P0156 C P0139 or P0159 D P0136, P0137, P0138, P0156, P0157 or P0158 and other DTCs are output E B --> See step 9 C --> See step 7 D --> See step 18 E --> See step 23 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 or O2S B2S2. Allow the engine to idle. Read the Heated Oxygen (HO2) sensor output voltage while idling. Result Tester Display Proceed to 1 V or more A Less than 1 V B B --> See step 5 A: Go to next step
3. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the E35 oxygen sensor connector (bank 1 sensor 2) or B19 oxygen sensor connector (bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Specified Condition 1 (+B) - 3 (E2) 10 kohms or higher 1 (+B) - 4 (OX1B) 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Specified Condition 2 (+B) - 4 (E2) 10 kohms or higher 2 (+B) - 3 (OX2B) 10 kohms or higher Reconnect the oxygen sensor connector. NG --> See step 24 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch off and wait for 5 minutes. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition B30-45 (HT1B) - B30-114 (OX1B) 10 kohms or higher B30-44 (HT2B) - B30-112 (OX2B) 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 28
5. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) 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 Injection Volume. Change the fuel injection volume using the Techstream, and monitor the voltage output of the Air-Fuel Ratio (A/F) and 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 A/F sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the HO2 sensor is displayed as O2S B1S2 or O2S B2S2 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 AFS Voltage B2S1 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 or O2S B2S2) 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 mA in this test. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Drive the vehicle according to the drive pattern as listed below: WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. Warm up the engine. 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 and RANGE B2S1 are either PASS or FAIL. If the Techstream shows incomplete, recheck RANGE B1S1 and RANGE B2S1 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 RANGE B1S1 and press ENTER. Read the test value. Standard current Less than 3.6 mA NOTE: Do not turn the ignition switch off during this step because the test results will be lost. OK --> See step 12 NG --> See step 15
7. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) 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 Injection Volume for A/F Sensor / All Data / O2S B1S2 or O2S B2S2. 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 -12.5% to +12.5%. 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 0.4 V or less and 0.5 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. Turn the Techstream on. Start the engine. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor. Change the fuel injection volume using the Techstream, and monitor the voltage output of the Air-Fuel Ratio (A/F) and HO2 sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12.5% to +12.5%. The injection volume can be changed in 1% gradations within this range. The A/F sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the HO2 sensor is displayed as O2S B1S2 or O2S B2S2 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 AFS Voltage B2S1 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 or O2S B2S2) 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 EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO AND REPAIR CAUSE (FUEL INJECTOR, FUEL PRESSURE, EXHAUST GAS LEAKAGE, ETC.)
9. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leakage from the exhaust manifold and pipe. OK No exhaust gas leakage. NG --> REPAIR OR REPLACE EXHAUST GAS LEAKAGE POINT OK: Go to next step
10. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the E35 oxygen sensor connector (bank 1 sensor 2) or B19 oxygen sensor connector (bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Condition Specified Condition 2 (HT1B) - 1 (+B) 20°C (68°F) 11 to 16 ohms 2 (HT1B) - 3 (E2) Always 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Condition Specified Condition 1 (HT2B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT2B) - 4 (E2) Always 10 kohms or higher Reconnect the oxygen sensor connector. NG --> See step 25 OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the E35 oxygen sensor connector (bank 1 sensor 2) or B19 oxygen sensor connector (bank 2 sensor 2). Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Terminal Connection Specified Condition E35-2 (HT1B) - B30-45 (HT1B) Below 1 ohms E35-4 (OX1B) - B30-114 (OX1B) Below 1 ohms E35-3 (E2) - B30-115 (EX1B) Below 1 ohms B19-1 (HT2B) - B30-44 (HT2B) Below 1 ohms B19-3 (OX2B) - B30-112 (OX2B) Below 1 ohms B19-4 (E2) - B30-113 (EX2B) Below 1 ohms Standard resistance (Check for short) Terminal Connection Specified Condition E35-2 (HT1B) or B30-45 (HT1B) - Body ground 10 kohms or higher E35-4 (OX1B) or B30-114 (OX1B) - Body ground 10 kohms or higher E35-3 (E2) or B30-115 (EX1B) - Body ground 10 kohms or higher B19-1 (HT2B) or B30-44 (HT2B) - Body ground 10 kohms or higher B19-3 (OX2B) or B30-112 (OX2B) - Body ground 10 kohms or higher B19-4 (E2) or B30-113 (EX2B) - 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
12. REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor.Refer to «COMPONENTS»(ref-493427-S31427539002012081000000) . NEXT: Go to next step
13. PERFORM CONFIRMATION DRIVING PATTERN Perform the CONFIRMATION DRIVING PATTERN (P0136, P0137, P0138, P0156, P0157 and P0158). NEXT: Go to next step
14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158 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 the DTC: P0136, P0137, P0138, P0156, P0157 and P0158. Check that DTC MONITOR is NORMAL. If DTC MONITOR is INCOMPLETE, perform the drive pattern increasing the vehicle speed and using second gear to decelerate the vehicle. Result Display (DTC Output) Proceed to ABNORMAL (P0136, P0137, P0138, P0156, P0157 or P0158 detected) A NORMAL (No DTC output) B B --> END A --> See step 29
15. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor.Refer to «REMOVAL»(ref-493427-S03761156882012081000000) . NEXT: Go to next step
16. PERFORM CONFIRMATION DRIVING PATTERN Perform the CONFIRMATION DRIVING PATTERN (P0136, P0137, P0138, P0156, P0157 and P0158). NEXT: Go to next step
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158 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 the DTC: P0136, P0137, P0138, P0156, P0157 and P0158. Check that DTC MONITOR is NORMAL. If DTC MONITOR is INCOMPLETE, perform the drive pattern increasing the vehicle speed and using second gear to decelerate the vehicle. Result Display (DTC Output) Proceed to ABNORMAL (P0136, P0137, P0138, P0156, P0157 or P0158 detected) A NORMAL (No DTC output) B B --> END A --> See step 30
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 or O2S B2S2. After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes. Idle the engine. Depress the accelerator pedal quickly until the engine speed reaches 2500 rpm 3 times. RESULT Result Proceed to Oxygen sensor output voltage higher than 1.0 V A Oxygen sensor output voltage below 1.0 V B B --> See step 21 A: Go to next step
19. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the E35 oxygen sensor connector (bank 1 sensor 2) or B19 oxygen sensor connector (bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Specified Condition 1 (+B) - 3 (E2) 10 kohms or higher 1 (+B) - 4 (OX1B) 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Specified Condition 2 (+B) - 4 (E2) 10 kohms or higher 2 (+B) - 3 (OX2B) 10 kohms or higher Reconnect the oxygen sensor connector. NG --> See step 26 OK: Go to next step
20. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the ignition switch off and wait for 5 minutes. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition B30-45 (HT1B) - B30-114 (OX1B) 10 kohms or higher B30-44 (HT2B) - B30-112 (OX2B) 10 kohms or higher Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 31
21. PERFORM CONFIRMATION DRIVING PATTERN Perform the CONFIRMATION DRIVING PATTERN (P0139 and P0159). NEXT: Go to next step
22. CHECK WHETHER DTC OUTPUT RECURS (DTC P0139 OR P0159 IS OUTPUT AGAIN) Read the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . RESULT Result Proceed to P0139 or P0159 is output A No DTC is output B B --> See step 27 A --> See step 32
23. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
24. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)
25. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)
26. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)
27. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
28. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
29. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-493427-S03761156882012081000000)
30. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)
31. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
32. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-493427-S06552159182012081000000)

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

Scheme 501

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171, P0172, P0174 OR P0175) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the tester ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P0171, P0172, P0174 or P0175 A P0171, P0172, P0174 or P0175 and other DTCs B HINT: If any DTCs other than P0171, P0172, P0174 or P0175 are output, troubleshoot those DTCs first. B --> See step 23 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. OK PCV hose is connected correctly and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage 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 idling (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 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12.5% to +12.5%. The injection volume can be changed in fine gradations. 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. If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning. Standard Tester Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) +12.5% Rich Below 3.1 V AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) -12.5% Lean Higher than 3.4 V O2S B1S2 or O2S B2S2 (HO2) +12.5% Rich Higher than 0.55 V O2S B1S2 or O2S B2S2 (HO2) -12.5% Lean Below 0.4 V RESULT Status of AFS Voltage B1S1 or AFS Voltage B2S1 Status of O2S B1S2 or O2S B2S2 A/F Condition and A/F Sensor Condition Suspected Trouble Area Proceed to Lean/Rich Lean/Rich Normal - A Lean Lean Actual air-fuel ratio lean 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 leak 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 higher than 3.4 V, and the HO2 sensor output voltage (O2S) is consistently below 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS is consistently below 3.1 V, and the O2S is consistently higher 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 tester ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp. Read Coolant Temp twice, when the engine is cold and when it is warmed up. Standard With cold engine: Same as ambient air temperature. With warm engine: Between 75°C and 100°C (167°F and 212°F). NG --> See step 24 OK: Go to next step
6. READ VALUE USING TECHSTREAM (MAF) 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 / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000 rpm. Standard Between 11.00 gm/s. and 16.00 gm/s. (shift lever: N; A/C: Off). NG --> See step 16 OK: Go to next step
7. CHECK FUEL PRESSURE Check the fuel pressure.Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-493470-S04487971902012081000000) . Standard pressure 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
8. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leakage. OK No gas leakage. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
9. CHECK FOR SPARKS AND IGNITION Check for sparks and ignition.Refer to «ON-VEHICLE INSPECTION»(ref-493423-S11308580832012081000000) . NG --> REPAIR OR REPLACE IGNITION SYSTEM OK: Go to next step
10. INSPECT FUEL INJECTOR (INJECTION AND VOLUME) Check the injection volume.Refer to «INSPECTION»(ref-493467-S30494626252012081000000) . OK --> See step 15 NG --> See step 25
11. INSPECT AIR-FUEL RATIO SENSOR (HEATER RESISTANCE) See step 1 NG --> See step 26 OK: Go to next step
12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL SENSOR) Disconnect the B48 or B33 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 B48-2 (+B) - Body ground Ignition switch ON 11 to 14 V B33-2 (+B) - Body ground Ignition switch ON 11 to 14 V Reconnect the air fuel ratio sensor connector. NG --> See step 21 OK: Go to next step
13. CHECK WIRE HARNESS (AIR FUEL RATIO SENSOR - ECM). Refer to «PROCEDURE - Step 3»(ref-493463-S42573188802012081000000) 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-493427-S03761156882012081000000) NEXT: Go to next step
15. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. RESULT Result Proceed to DTC P0171 or P0172 is output A DTC is not output B B --> END A: Go to next step
16. CHECK HARNESS AND CONNECTOR Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM.Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000) . HINT: Repair any problems. NEXT: Go to next step
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174 OR P0175) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. RESULT Result Proceed to DTC P0171, P0172, P0174, P0175 is output A DTC is not output B B --> END A: Go to next step
18. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B1 mass air flow meter connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B1-5 (VG) - B30-74 (VG) Always Below 1 ohms B1-4 (E2G) - B30-75 (E2G) Always Below 1 ohms B1-5 (VG) or B30-74 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
19. REPLACE MASS AIR FLOW METER Replace the mass air flow meter assembly.Refer to «REMOVAL»(ref-493466-S37228417242012081000000) . HINT: If the result of the inspection performed in step 6 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly. NEXT: Go to next step
20. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. RESULT Result Proceed to DTC is not output A DTC P0171, P0172, P0174, P0175 is output B B --> See step 27 A --> END
21. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION RELAY) Disconnect the B48 or B33 air fuel ratio sensor connector. Remove the integration relay (A/F relay) from the engine room No. 1 relay block.Refer to «ON-VEHICLE INSPECTION»(ref-493466-S42585886872012081000000) . Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for open) Tester Connection Condition Specified Condition B48-2 (+B) - 1B-8 Always Below 1 ohms B33-2 (+B) - 1B-8 Always Below 1 ohms Standard Resistance (Check for short) Tester Connection Condition Specified Condition B7-2 (+B) or 1B-8 - Body ground Always 10 kohms or higher B7-2 (+B) or 1B-8 - 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: Go to next step
22. INSPECT INTEGRATION NO. 1 RELAY Inspect the No. 1 integration relay (A/F).Refer to «ON-VEHICLE INSPECTION»(ref-493466-S42585886872012081000000) . NG --> REPLACE INTEGRATION NO. 1 RELAY OK --> See step 28
23. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
24. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493466-S10610308662012081000000)
25. REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-493467-S37933332382012081000000)
26. REPLACE AIR-FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-493427-S03761156882012081000000)
27. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
28. GO TO ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-493463-S18863697402012081000000)

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 can be considered to be a possible cause of the problem: There was insufficient fuel volume in the tank. Improper fuel was used. The spark plugs have been contaminated.
5. After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #6 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. For 6 and 8 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at high engine RPM. If misfires occur only in high engine RPM areas, only DTC P0300 is set. In the event of DTC P0300 being present, perform the following operations: Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine and conduct the confirmation driving pattern. Read the misfiring rates of each cylinder or the DTC(s) using the tester. Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC. After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not set.
8. 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).
9. When Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfire may have occurred only while warming up the engine.
10. An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs to be detected.

Scheme 502

Scheme 503

Scheme 504

Scheme 505

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE CODES) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the tester on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. HINT: Write down the DTCs. Result Display (DTC Output) Proceed to P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 A P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs B HINT: If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and P0306 are output, troubleshoot those DTCs first. B --> See step 37 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. OK PCV hose is correctly connected and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the ignition switch 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 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 / Catalyst OT MF F/C. Read the value displayed on the Techstream. Result Data List Display Item 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 the Techstream to the DLC3. Turn the ignition switch to ON and 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 the engine is either idling or being revved within 3000 rpm. NEXT: Go to next step
6. READ VALUE USING TECHSTREAM (MISFIRE COUNT) Enter the following menus: Powertrain / Engine and ECT / Data List / Misfire / Cylinder #1 Misfire Count, #2, #3, #4, #5 and #6. Read the value for Cylinder #1 Misfire Count to cylinder #6 Misfire Count displayed on the Techstream. If no misfire counts occur in any cylinders, perform the following procedures: Start the engine and let it idle. Move the shift lever to the D position. Check Cylinder #1 Misfire Count to cylinder #6 Misfire Count. If misfire counts are still not displayed, perform the steps below. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "READ VALUE OF TECHSTREAM (MISFIRE RPM and MISFIRE LOAD)" procedures above. Read Cylinder #1 Misfire Count to cylinder #6 Misfire Count or DTCs displayed on the Techstream. Result Misfire Count Proceed to Most misfires occur in only 1 or 2 cylinders A 3 cylinders or more have equal misfire counts B HINT: If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal. If the freeze frame data's record of the engine coolant temperature is below 75°C (167°F), the misfire may be detected only when the engine is cold. If the freeze frame data's record of Engine Run Time is below 120 seconds, the misfire may be detected immediately after the engine is started. B --> See step 18 A: Go to next step
7. CHECK SPARK PLUG Remove the ignition coil and spark plug from the misfiring cylinder. Measure the spark plug electrode gap. Electrode gap for new spark plug 1.0 to 1.1 mm (0.039 to 0.043 in.) Maximum electrode gap for used spark plug 1.4 mm (0.055 in.) RECOMMENDED SPARK PLUG: Manufacturer Product DENSO made FK20HR11 NOTE: If the electrode gap is more than the maximum, replace the spark plug. Do not adjust the electrode gap. Check the electrode for carbon deposits. NOTE: If necessary, clean the spark plug. Reinstall the ignition coil. NG --> See step 38 OK: Go to next step
8. CHECK FOR SPARKS AND IGNITION Perform a spark test. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug to the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 34 OK: Go to next step
9. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder.Refer to «ON-VEHICLE INSPECTION - Step 4»(ref-493421-S22719119202012081000000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
10. CHECK FUEL INJECTOR (POWER SOURCE) Disconnect the fuel injector assembly connector. Turn the ignition switch ON. Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B53-2 - Body ground Ignition switch ON 11 to 14 V No. 2 B37-2 - Body ground Ignition switch ON 11 to 14 V No. 3 B52-2 - Body ground Ignition switch ON 11 to 14 V No. 4 B36-2 - Body ground Ignition switch ON 11 to 14 V No. 5 B51-2 - Body ground Ignition switch ON 11 to 14 V No. 6 B35-2 - Body ground Ignition switch ON 11 to 14 V Turn the ignition switch off. Reconnect the fuel injector assembly connector. NG --> See step 39 OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING CYLINDER) Disconnect the injector connector (of the misfiring cylinder). Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Cylinder Tester Connection Specified Condition No. 1 B53-1 - Body ground 10 kohms or higher B53-1 - B30-86 (#10) Below 1 ohms No. 2 B37-1 - Body ground 10 kohms or higher B37-1 - B30-109 (#20) Below 1 ohms No. 3 B52-1 - Body ground 10 kohms or higher B52-1 - B30-85 (#30) Below 1 ohms No. 4 B36-1 - Body ground 10 kohms or higher B36-1 - B30-108 (#40) Below 1 ohms No. 5 B51-1 - Body ground 10 kohms or higher B51-1 - B30-84 (#50) Below 1 ohms No. 6 B35-1 - Body ground 10 kohms or higher B35-1 - B30-107 (#60) Below 1 ohms Reconnect the injector connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR - ECM) OK: Go to next step
12. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance.Refer to «INSPECTION»(ref-493467-S30494626252012081000000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor).Refer to «INSPECTION»(ref-493467-S30494626252012081000000) . NG --> See step 40 OK: Go to next step
13. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
14. CHECK FUEL PRESSURE Check the fuel pressure.Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-493470-S04487971902012081000000) . NG --> See step 36 OK: Go to next step
15. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 2 NG --> See step 41 OK: Go to next step
16. READ VALUE USING TECHSTREAM (MAF) 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 / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000 rpm. Standard Between 11.00 gm/s. and 16.00 gm/s. (shift lever: N; A/C: Off). NG --> See step 29 OK: Go to next step
17. CHECK VALVE TIMING See step 4 OK --> See step 29 NG --> ADJUST VALVE TIMING
18. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
19. CHECK FUEL PRESSURE Check the fuel pressure.Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-493470-S04487971902012081000000) . NG --> See step 36 OK: Go to next step
20. READ VALUE USING TECHSTREAM (COOLANT TEMP) See step 2 NG --> See step 42 OK: Go to next step
21. READ VALUE USING TECHSTREAM (MAF) 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 / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000 rpm. Standard Between 11.00 gm/s. and 16.00 gm/s. (shift lever: N; A/C: Off). NG --> See step 29 OK: Go to next step
22. CHECK VALVE TIMING See step 4 NG --> ADJUST VALVE TIMING OK: Go to next step
23. CHECK SPARK PLUG Remove the ignition coil and spark plug from the misfiring cylinder. Measure the spark plug electrode gap. Electrode gap for new spark plug 1.0 to 1.1 mm (0.039 to 0.043 in.) Maximum electrode gap for used spark plug 1.4 mm (0.055 in.) RECOMMENDED SPARK PLUG: Manufacturer Product DENSO made FK20HR11 NOTE: If the electrode gap is more than the maximum, replace the spark plug. Do not adjust the electrode gap. Check the electrode for carbon deposits. NOTE: If necessary, clean the spark plug. Reinstall the ignition coil. NG --> See step 43 OK: Go to next step
24. CHECK FOR SPARKS AND IGNITION Perform a spark test. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug to the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 34 OK: Go to next step
25. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder.Refer to «ON-VEHICLE INSPECTION - Step 4»(ref-493421-S22719119202012081000000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
26. CHECK FUEL INJECTOR (POWER SOURCE) Disconnect the fuel injector assembly connector. Turn the ignition switch ON. Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B53-2 - Body ground Ignition switch ON 11 to 14 V No. 2 B37-2 - Body ground Ignition switch ON 11 to 14 V No. 3 B52-2 - Body ground Ignition switch ON 11 to 14 V No. 4 B36-2 - Body ground Ignition switch ON 11 to 14 V No. 5 B51-2 - Body ground Ignition switch ON 11 to 14 V No. 6 B35-2 - Body ground Ignition switch ON 11 to 14 V Turn the ignition switch off. Reconnect the fuel injector assembly connector. NG --> See step 44 OK: Go to next step
27. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING CYLINDER) Disconnect the injector connector (of the misfiring cylinder). Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Cylinder Tester Connection Specified Condition No. 1 B53-1 - Body ground 10 kohms or higher B53-1 - B30-86 (#10) Below 1 ohms No. 2 B37-1 - Body ground 10 kohms or higher B37-1 - B30-109 (#20) Below 1 ohms No. 3 B52-1 - Body ground 10 kohms or higher B52-1 - B30-85 (#30) Below 1 ohms No. 4 B36-1 - Body ground 10 kohms or higher B36-1 - B30-108 (#40) Below 1 ohms No. 5 B51-1 - Body ground 10 kohms or higher B51-1 - B30-84 (#50) Below 1 ohms No. 6 B35-1 - Body ground 10 kohms or higher B35-1 - B30-107 (#60) Below 1 ohms Reconnect the injector connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR - ECM) OK: Go to next step
28. CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance.Refer to «INSPECTION»(ref-493467-S30494626252012081000000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor).Refer to «INSPECTION»(ref-493467-S30494626252012081000000) . NG --> See step 45 OK: Go to next step
29. CHECK HARNESS AND CONNECTOR Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM.Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000) . HINT: Repair any problems. NEXT: Go to next step
30. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306. Check the DTC judgment result. RESULT Display (DTC Output) Proceed to ABNORMAL (P0300, P0301, P0302, P0303, P0304, P0305 or P0306 output) A NORMAL (No DTC output) B B --> END A: Go to next step
31. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B1 mass air flow meter connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B1-5 (VG) - B30-74 (VG) Always Below 1 ohms B1-4 (E2G) - B30-75 (E2G) Always Below 1 ohms B1-5 (VG) or B30-74 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
32. REPLACE MASS AIR FLOW METER Replace the mass air flow meter assembly.Refer to «REMOVAL»(ref-493466-S37228417242012081000000) . HINT: If the results of the inspections performed in steps 16 and 21 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly. NEXT: Go to next step
33. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306. Check the DTC judgment result. RESULT Display (DTC Output) Proceed to NORMAL (No DTC output) A ABNORMAL (P0300, P0301, P0302, P0303 or P0304, P0305 or P0306 output) B B --> REPLACE ECM A --> END
34. CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Change the installed spark plug to a spark plug that functions normally. Perform a spark test. WARNING: Always disconnect all the injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug into the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 35 OK --> See step 47
35. CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER Change the ignition coil to an ignition coil that functions normally. Perform a spark test. WARNING: Always disconnect all the injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug into the ignition coil and connect the ignition coil connector. Disconnect the injector connectors. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 46 OK --> See step 48
36. CHECK FUEL LINE Check the fuel lines for leaks or blockage. NG --> REPAIR OR REPLACE FUEL LINE OK --> See step 49
37. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
38. REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-493471-S41687785962012081000000)
39. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-493463-S03366458752012081000000)
40. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-493467-S37933332382012081000000)
41. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493466-S10610308662012081000000)
42. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493466-S10610308662012081000000)
43. REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-493471-S41687785962012081000000)
44. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-493463-S03366458752012081000000)
45. REPLACE FUEL INJECTOR. Refer to «REMOVAL»(ref-493467-S37933332382012081000000)
46. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
47. REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-493471-S41687785962012081000000)
48. REPLACE IGNITION COIL. Refer to «REMOVAL»(ref-493471-S41687785962012081000000)
49. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-493467-S31356503202012081000000)

HINT

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

Scheme 506

Scheme 507

Scheme 508

Scheme 509

Scheme 510

1. READ DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT) Disconnect the BR1 connector. Using lead wires, connect the connectors as follows: Male Connector - Female Connector Terminal 2 - Terminal 4 Terminal 1 - Terminal 3 Terminal 4 - Terminal 2 Terminal 3 - Terminal 1 Warm up the engine. Run the engine at 3, 000 rpm for 10 seconds or more. 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 / Trouble Codes. Read DTCs. Result Display Proceed to DTC is same as when vehicle brought in (for example, P0327 and P0328 are output again, or P0332 and P0333 are output again) A DTC is different from when vehicle brought in (for example, P0327 and P0328 are output at first, but then P0332 and P0333 are output, or vice versa) B Reconnect the BR1 connector. B --> See step 4 A: Go to next step
2. CHECK WIRE HARNESS (CONNECTOR - ECM) Disconnect the BR1 connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition BR1 female connector 2 - B30-94 (KNK1) Below 1 ohms BR1 female connector 1 - B30-93 (EKNK) Below 1 ohms BR1 female connector 4 - B30-117 (KNK2) Below 1 ohms BR1 female connector 3 - B30-116 (EKN2) Below 1 ohms BR1 female connector 2 or B30-94 (KNK1) - Body ground 10 kohms or higher BR1 female connector 1 or B30-93 (EKNK) - Body ground 10 kohms or higher BR1 female connector 4 or B30-117 (KNK2) - Body ground 10 kohms or higher BR1 female connector 3 or B30-116 (EKN2) - Body ground 10 kohms or higher Reconnect the BR1 connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT ECM (VOLTAGE) Disconnect the BR1 connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition BR1 female connector 2 - 1 4.5 to 5.5 V BR1 female connector 4 - 3 4.5 to 5.5 V Reconnect the BR1 connector. NG --> See step 6 OK --> See step 7
4. INSPECT KNOCK SENSOR Disconnect the BR1 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition BR1 male connector 1 - 2 20°C (68°F) 120 to 280 kohms BR1 male connector 3 - 4 20°C (68°F) 120 to 280 kohms Reconnect the BR1 connector. OK --> See step 7 NG: Go to next step
5. CHECK WIRE HARNESS (CONNECTOR - KNOCK SENSOR) HINT: If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on the right bank side. If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on the left bank side. Disconnect the BR1 connector. Disconnect the R1 and R2 knock sensor connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition BR1 male connector 2 - R2-2 Below 1 ohms BR1 male connector 1 - R2-1 Below 1 ohms BR1 male connector 4 - R1-2 Below 1 ohms BR1 male connector 3 - R1-1 Below 1 ohms BR1 male connector 2 or R2-2 - Body ground 10 kohms or higher BR1 male connector 1 or R2-1 - Body ground 10 kohms or higher BR1 male connector 4 or R1-2 - Body ground 10 kohms or higher BR1 male connector 3 or R1-1 - Body ground 10 kohms or higher Reconnect the BR1 connector. Reconnect the knock sensor connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
8. REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-493466-S24564239092012081000000)

HINT

1. After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor. Installation condition of the camshaft position sensor. Installation condition of the camshaft. Connection of the camshaft position sensor connector.
2. If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
3. 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. Select the following menu items: Powertrain / Engine and ECT / Data List / Engine Speed. The engine speed may be indicated as zero despite the crankshaft revolving normally. This is caused by a lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.
4. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Scheme 511

Scheme 512

Scheme 513

1. READ VALUE USING TECHSTREAM (ENGINE SPD) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Engine Speed. Start the engine. Read the values displayed on the Techstream while the engine is running. Standard Correct values are displayed. HINT: To check the engine speed change, display the graph on the Techstream. If the engine does not start, check the engine speed while cranking. If the engine speed indicated on the Techstream remains at zero (0), there may be an open or short in the Crankshaft Position (CKP) sensor circuit. OK --> See step 8 NG: Go to next step
2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) Disconnect the B46 CKP sensor connector. Measure the resistance between terminals 1 and 2. Standard resistance Tester Connection Condition Specified Condition 1 - 2 Cold 1630 to 2740 ohms 1 - 2 Hot 2065 to 3225 ohms HINT: The terms "Cold" and "Hot" refer to the temperature of the sensor. Cold means approximately -10 to 50°C (14 to 122°F). Hot means approximately 50 to 100°C (122 to 212°F). Reconnect the CKP sensor connector. NG --> See step 9 OK: Go to next step
3. CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the B46 CKP sensor connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B46-1 (NE+) - B30-110 (NE+) Below 1 ohms B46-2 (NE-) - B30-111 (NE-) Below 1 ohms B46-1 (NE+) or B30-110 (NE+) - Body ground 10 kohms or higher B46-2 (NE-) or B30-111 (NE-) - Body ground 10 kohms or higher 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 --> SECURELY REINSTALL SENSOR OK: Go to next step
5. CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE) Check the teeth of the sensor plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> REPLACE CRANKSHAFT SUB-ASSEMBLY OK: Go to next step
6. REPLACE CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor.Refer to «REMOVAL»(ref-493466-S32548138682012081000000) . 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-493460-S06003279822012081000000) . Start the engine. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. 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 10 A --> END
8. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
9. REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-493466-S32548138682012081000000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
4. Sensor 1 refers to the sensor closest to the engine assembly.
5. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 514

Scheme 515

Scheme 516

1. CHECK WIRE HARNESS (SENSOR POWER SOURCE) Disconnect the B59 or B45 VVT sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition B59-3 (VC) - Body ground 4.5 to 5.0 V B45-3 (VC) - Body ground 4.5 to 5.0 V Reconnect the VVT sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK WIRE HARNESS (VVT SENSOR FOR INTAKE CAMSHAFT - ECM) Disconnect the B59 or B45 VVT sensor connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition B59-1 (VVR+) - B30-90 (VV1+) Below 1 ohms B59-2 (VVR-) - B30-89 (VV1-) Below 1 ohms B45-1 (VVL+) - B30-87 (VV2+) Below 1 ohms B45-2 (VVL-) - B30-88 (VV2-) Below 1 ohms B59-1 (VVR+) or B30-90 (VV1+) - Body ground 10 kohms or higher B59-2 (VVR-) or B30-89 (VV1-) - Body ground 10 kohms or higher B45-1 (VVL+) or B30-87 (VV2+) - Body ground 10 kohms or higher B45-2 (VVL-) or B30-88 (VV2-) - Body ground 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE CAMSHAFT) Check the CKP sensor installation. OK Sensor is installed correctly. NG --> SECURELY REINSTALL SENSOR OK: Go to next step
4. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE) Check the teeth of the signal plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> REPLACE CAMSHAFT TIMING GEAR ASSEMBLY OK: Go to next step
5. REPLACE VVT SENSOR Replace the VVT sensor.Refer to «REMOVAL»(ref-493466-S37404021992012081000000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Clear DTCs. Start the engine. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. Read DTCs. Result Display (DTC Output) Proceed to No output A P0340, P0342, P0343, P0345, P0347 or P0348 B HINT: If the engine does not start, replace the ECM. B --> See step 7 A --> END
7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

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 517

Scheme 518

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) Disconnect the ignition coil with igniter connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B56-4 (GND) - Body ground Below 1 ohms B42-4 (GND) - Body ground Below 1 ohms B55-4 (GND) - Body ground Below 1 ohms B41-4 (GND) - Body ground Below 1 ohms B49-4 (GND) - Body ground Below 1 ohms B39-4 (GND) - Body ground Below 1 ohms Turn the ignition switch to ON. Measure the voltage between the terminals of the wire harness side connector. Standard voltage Tester Connection Specified Condition B56-1 (+B) - B56-4 (GND) 11 to 14 V B42-1 (+B) - B42-4 (GND) 11 to 14 V B55-1 (+B) - B55-4 (GND) 11 to 14 V B41-1 (+B) - B41-4 (GND) 11 to 14 V B49-1 (+B) - B49-4 (GND) 11 to 14 V B39-1 (+B) - B39-4 (GND) 11 to 14 V Reconnect the ignition coil with igniter connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK WIRE HARNESS (IGNITION COIL ASSEMBLY - ECM) Disconnect the ignition coil with igniter connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B56-2 (IGF) - B30-104 (IGF1) Below 1 ohms B42-2 (IGF) - B30-104 (IGF1) Below 1 ohms B55-2 (IGF) - B30-104 (IGF1) Below 1 ohms B41-2 (IGF) - B30-104 (IGF1) Below 1 ohms B49-2 (IGF) - B30-104 (IGF1) Below 1 ohms B39-2 (IGF) - B30-104 (IGF1) Below 1 ohms B56-3 (IGT1) - B30-40 (IGT1) Below 1 ohms B42-3 (IGT2) - B30-39 (IGT2) Below 1 ohms B55-3 (IGT3) - B30-38 (IGT3) Below 1 ohms B41-3 (IGT4) - B30-37 (IGT4) Below 1 ohms B49-3 (IGT5) - B30-36 (IGT5) Below 1 ohms B39-3 (IGT6) - B30-35 (IGT6) Below 1 ohms B56-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B42-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B55-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B41-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B49-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B39-2 (IGF) or B30-104 (IGF1) - Body ground 10 kohms or higher B56-3 (IGT1) or B30-40 (IGT1) - Body ground 10 kohms or higher B42-3 (IGT2) or B30-39 (IGT2) - Body ground 10 kohms or higher B55-3 (IGT3) or B30-38 (IGT3) - Body ground 10 kohms or higher B41-3 (IGT4) or B30-37 (IGT4) - Body ground 10 kohms or higher B49-3 (IGT5) or B30-36 (IGT5) - Body ground 10 kohms or higher B39-3 (IGT6) or B30-35 (IGT6) - Body ground 10 kohms or higher Reconnect the ECM connector. Reconnect the ignition coil with igniter connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355 OR P0356) 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-493460-S06003279822012081000000) . Shuffle the arrangement of the ignition coils with igniters (among No. 1 to No. 6 cylinders). NOTE: Do not shuffle the connectors. Perform a simulation test. 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 ASSEMBLY. Refer to «REMOVAL»(ref-493471-S41687785962012081000000)
5. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
3. Bank 2 refers to the bank that does not include the No. 1 cylinder.

Scheme 519

Scheme 520

Scheme 521

1. CHECK WIRE HARNESS (SENSOR POWER SOURCE) Disconnect the B54 or B40 VVT sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition B54-3 (VC2) - Body ground 4.5 to 5.0 V B40-3 (VC2) - Body ground 4.5 to 5.0 V Reconnect the VVT sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK WIRE HARNESS (VVT SENSOR - ECM) Disconnect the B54 or B40 VVT sensor connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition B54-1 (EX+) - B30-69 (EV1+) Below 1 ohms B54-2 (EX-) - B30-68 (EV1-) Below 1 ohms B40-1 (EX+) - B30-64 (EV2+) Below 1 ohms B40-2 (EX-) - B30-65 (EV2-) Below 1 ohms B54-1 (EX+) or B30-69 (EV1+) - Body ground 10 kohms or higher B54-2 (EX-) or B30-68 (EV1-) - Body ground 10 kohms or higher B40-1 (EX+) or B30-64 (EV2+) - Body ground 10 kohms or higher B40-2 (EX-) or B30-65 (EV2-) - Body ground 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR EXHAUST CAMSHAFT) Check the VVT sensor installation. OK Sensor is installed correctly. NG --> SECURELY REINSTALL SENSOR OK: Go to next step
4. CHECK EXHAUST CAMSHAFT Check the teeth of the camshaft. OK Teeth do not have any cracks or deformation. NG --> See step 7 OK: Go to next step
5. REPLACE EXHAUST VVT SENSOR Replace the exhaust VVT sensor.Refer to «REMOVAL»(ref-493466-S37404021992012081000000) . NEXT: Go to next step
6. 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-493460-S06003279822012081000000) . Start the engine. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to No output A P0365, P0352, P0353, P0354, P0355 or P0356 B HINT: If the engine does not start, replace the ECM. B --> See step 8 A --> END
7. REPLACE EXHAUST CAMSHAFT. Refer to «REMOVAL»(ref-493421-S16468396402012081000000)
8. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

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 522

1. Connect the Techstream to the DLC3 (a).
2. Start the engine and warm it up with all the accessories switched OFF until the engine coolant temperature stabilizes (b).
3. Run the engine at an engine speed of between 2, 500 rpm and 3, 000 rpm for at least 3 minutes (c).
4. While running the engine at 3, 000 rpm and 2, 000 rpm alternating at 2 second intervals, check the waveforms of the A/F and HO2 sensors using the Techstream (d).

HINT

1. If either voltage output of the Air-Fuel Ratio (A/F) or Heated Oxygen (HO2) sensor does not fluctuate, or there is noise in the waveform of either sensor, the sensor may be malfunctioning.
2. If the voltage outputs of both sensors remain lean or rich, the air-fuel ratio may be extremely lean or rich. In such cases, perform the following A/F Control using the Techstream.
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 523

HINT

1. If a malfunction cannot be found when troubleshooting DTC P0420, a lean or rich abnormality may be the cause. Perform troubleshooting by following the inspection procedure for P0171, P0174 (System Too Lean) and P0172, P0175 (System Too Rich).
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. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
4. Bank 2 refers to the bank that does not include the No. 1 cylinder.

DTC SUMMARY

HINT

The reference orifice is located inside the canister pump module.

Refer to EVAP System.Refer to INSPECTION PROCEDURE .

Refer to EVAP System.Refer to 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 524

Scheme 525

Scheme 526

1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE VSV FOR EVAP CONTROL) Connect the Techstream to the DLC3. Disconnect the vacuum hose (charcoal canister side) from the purge VSV. Start the engine. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control. When the purge VSV is operated using the Techstream, check whether the port of the purge VSV applies suction to your finger. OK Tester Operation Specified Condition VSV ON Purge VSV port applies suction to finger VSV OFF Purge VSV port applies no suction to finger Reconnect the vacuum hose to the purge VSV. NG --> See step 2 OK --> See step 4
2. INSPECT PURGE VSV (RESISTANCE) Disconnect B34 purge VSV connector. Measure the resistance according to the value(s) in the table below. HINT: When measuring the resistance, make sure the surface temperature of the purge VSV is 20°C (68°F). Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 23 to 26 ohms Reconnect the purge VSV connector. NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM AND INTEGRATION RELAY) Remove the EFI No. 1 fuse from the engine room No. 1 relay block. Check the EFI No. 1 fuse. Reinstall the EFI No. 1 fuse. Disconnect the B34 purge VSV connector. Disconnect the B30 ECM connector. Remove the integration relay from the engine room No. 1 relay block. Disconnect the 1A integration relay connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition B34-2 - B30-63 (PRG) Below 1 ohms B34-1 - 1A-4 Below 1 ohms B34-2 or B30-63 (PRG) - Body ground 10 kohms or higher B34-1 or 1A-4 - Body ground 10 kohms or higher Reconnect the integration relay connector. Reinstall the integration relay. Reconnect the ECM connector. Reconnect the purge VSV connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE FUSE OK --> See step 6
4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
5. REPLACE PURGE VSV. Refer to «REMOVAL»(ref-493427-S05341499062012081000000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)