Home ReviewsRefund
Home/Toyota/Prius/Toyota Prius III (2009-2011)/Repair manual/Testing & Diagnostics/Engine Control (Sfi) System (Diagnostic Codes (P0010-P0171)…
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Control (Sfi) System (Diagnostic Codes (P0010-P0171)) (Except Phv): Diagnosis Toyota Prius III

Testing & Diagnostics 38 illustrations ~13854 words

INSPECTION PROCEDURE

HINT

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

Scheme 256

Scheme 256: PROCEDURE
Scheme 256: PROCEDURE

Scheme 257

Scheme 257
Scheme 257

Scheme 258

Scheme 258
Scheme 258
  1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly using the Techstream. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) HINT: If the result is not acceptable, cool the engine and perform the Active Test again. Start the engine when the engine coolant temperature is 30°C (86°F) or less. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream with the engine coolant temperature is 50°C (122°F) or less. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) NG --> See step 2 OK --> See step 6
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Remove the camshaft timing oil control valve assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly. NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) Disconnect the camshaft timing oil control valve assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D25-1 (+) - D28-36 (OC1+) Always Below 1 ohms D25-2 (-) - D28-59 (OC1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D25-1 (+) or D28-36 (OC1+) - Body ground Always 10 kohms or higher D25-2 (-) or D28-59 (OC1-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Camshaft Timing Oil Control Valve Assembly) *2 Front view of wire harness connector (to ECM) Reconnect the camshaft timing oil control valve assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) OK --> See step 4
  4. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  5. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-393185-S11587977912011040700000)
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)

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

HINT

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

Scheme 259

Scheme 259
Scheme 259

Scheme 260

Scheme 260
Scheme 260
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0011 or P0012 is output A DTC P0011 or P0012 and other DTCs are output B HINT: If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first. B --> See step 10 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly using the Techstream. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) HINT: If the result is not acceptable, cool the engine and perform the Active Test again. Start the engine when the engine coolant temperature is 30°C (86°F) or less. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly using the Techstream with the engine coolant temperature at 50°C (122°F) or less. Result Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON) NG --> See step 5 OK: Go to next step
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Driving the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0011 or P0012 is output B B --> See step 8 A --> See step 4
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)
  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Remove the camshaft timing oil control valve assembly. Refer to «REMOVAL»(ref-393185-S11587977912011040700000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Camshaft Timing Oil Control Valve Assembly) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the camshaft timing oil control valve assembly. Refer to «INSTALLATION»(ref-393185-S10978876392011040700000) . NG --> See step 11 OK: Go to next step
  6. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (FOR INTAKE CAMSHAFT) Inspect the camshaft timing gear assembly (for intake camshaft). Refer to «INSPECTION»(ref-393186-S10480110792011040700000) . NG --> See step 13 OK: Go to next step
  7. INSPECT OIL CONTROL VALVE FILTER Remove the oil control valve filter. Refer to «DISASSEMBLY»(ref-393186-S26468347332011040700000) . Check that the filter is not clogged. OK Filter is not clogged. Reinstall the oil control valve filter. Refer to «REASSEMBLY»(ref-393186-S09090019182011040700000) . NG --> See step 12 OK: Go to next step
  8. ADJUST VALVE TIMING HINT: There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to match-up the alignment marks. Refer to «DISASSEMBLY»(ref-393186-S26468347332011040700000) . TEXT IN ILLUSTRATION *1 Top *2 Alignment Mark *3 No. 1 Cylinder at TDC Compression NEXT: Go to next step
  9. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0011 or P0012 is output B B --> See step 14 A --> END
  10. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-393183-S20320380732011040700000)
  11. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-393185-S11587977912011040700000)
  12. REPLACE OIL CONTROL VALVE FILTER. Refer to «DISASSEMBLY»(ref-393186-S26468347332011040700000)
  13. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «REMOVAL»(ref-393186-S23046288822011040700000)
  14. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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

HINT

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

Scheme 261

Scheme 261: PROCEDURE
Scheme 261: PROCEDURE

Scheme 262

Scheme 262
Scheme 262

Scheme 263

Scheme 263
Scheme 263
  1. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the air fuel ratio sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 5 OK: Go to next step
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE) Disconnect the air fuel ratio sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D24-2 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - EFI MAIN RELAY) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D24-1 (HA1A) - D28-18 (HA1A) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D24-1 (HA1A) or D28-18 (HA1A) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Fuel Ratio Sensor) *2 Front view of wire harness connector (to ECM) Reconnect the air fuel ratio sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - ECM) OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0031 OR P0032) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. Allow the engine to idle for 5 minutes or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC P0031, P0032 or P101D is output B B --> See step 6 A --> See step 7
  5. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-393185-S15352357012011040700000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)

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

HINT

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

Scheme 264

Scheme 264: PROCEDURE
Scheme 264: PROCEDURE

Scheme 265

Scheme 265
Scheme 265

Scheme 266

Scheme 266
Scheme 266
  1. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HT1B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT1B) - 4 (E2) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor (Sensor 2)) Reconnect the heated oxygen sensor connector. NG --> See step 5 OK: Go to next step
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE) Disconnect the heated oxygen sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D9-2 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of harness connector (to Heated Oxygen Sensor (Sensor 2)) Reconnect the heated oxygen sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - EFI MAIN RELAY) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D9-1 (HT1B) - D28-41 (HT1B) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D9-1 (HT1B) or D28-41 (HT1B) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of harness connector (to Heated Oxygen Sensor (Sensor 2)) *2 Front view of harness connector (to ECM) Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038, P0141 OR P0101D) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. Result Result Proceed to DTC is not output A DTC P0037, P0038, P0141 or P102D is output B B --> See step 6 A --> See step 7
  5. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-393185-S05487932482011040700000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)

HINT

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

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

HINT

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

Scheme 267

Scheme 267: PROCEDURE
Scheme 267: PROCEDURE

Scheme 268

Scheme 268
Scheme 268

Scheme 269

Scheme 269
Scheme 269

Scheme 270

Scheme 270
Scheme 270

Scheme 271

Scheme 271
Scheme 271
  1. READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0102 is output A DTC P0103 is output B B --> See step 5 A: Go to next step
  2. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY (POWER SOURCE VOLTAGE) Disconnect the mass air flow meter sub-assembly connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D5-3 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) Reconnect the mass air flow meter sub-assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI MAIN RELAY - MASS AIR FLOW METER SUB-ASSEMBLY) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) Disconnect the mass air flow meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D5-5 (VG) - D28-94 (VG) Always Below 1 ohms D5-4 (E2G) - D28-117 (E2G) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D5-5 (VG) or D28-94 (VG) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) *2 Front view of wire harness connector (to ECM) Reconnect the mass air flow meter sub-assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) OK: Go to next step
  4. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Perform On-vehicle inspection. Refer to «ON-VEHICLE INSPECTION»(ref-393185-S14355653952011040700000) . Perform Inspection. Refer to «INSPECTION»(ref-393185-S09084174912011040700000) . Inspect the function of the mass air flow meter sub-assembly. Remove the mass air flow meter sub-assembly with the connector connected. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF. Blow air to the mass air flow meter sub-assembly and check that the intake air amount reading changes. OK The reading changes. NG --> See step 7 OK --> See step 8
  5. CHECK HARNESS AND CONNECTOR (SENSOR GROUND) Disconnect the mass air flow meter meter sub-assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D5-4 (E2G) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) Reconnect the mass air flow meter sub-assembly connector. NG --> See step 6 OK --> See step 7
  6. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) Disconnect the mass air flow meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D5-4 (E2G) - D28-117 (E2G) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) *2 Front view of wire harness connector (to ECM) Reconnect the mass air flow meter sub-assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) OK --> See step 8
  7. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-393185-S21730933332011040700000)
  8. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)

HINT

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

HINT

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

Scheme 272

Scheme 272: PROCEDURE
Scheme 272: PROCEDURE
  1. READ VALUE USING TECHSTREAM (MAP) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP. Read the MAP value. OK Same value as the actual atmospheric pressure. HINT: Standard atmospheric pressure is 101 kPa. For every 100 m (328 ft.) increase in altitude, pressure drops by 1 kPa. The pressure also varies due to the weather (high atmospheric pressure, low atmospheric pressure). Also, check "Atmosphere Pressure" in the Data List. NG --> See step 2 OK --> See step 7
  2. CHECK TERMINAL VOLTAGE (MANIFOLD ABSOLUTE PRESSURE SENSOR) Disconnect the manifold absolute pressure sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D3-3 (VC) - D3-2 (E2) Power switch on (IG) 4.5 to 5.5 V D3-1 (PIM) - D3-2 (E2) Power switch on (IG) 4.0 to 5.0 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Manifold Absolute Pressure Sensor) Reconnect the manifold absolute pressure sensor connector. Result Result Proceed to Outside standard range A Within standard range B B --> See step 4 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM) Disconnect the manifold absolute pressure sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D3-3 (VC) - D28-72 (VCPM) Always Below 1 ohms D3-2 (E2) - D28-71 (EPIM) D3-1 (PIM) - D28-69 (PIM) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D3-3 (VC) or D28-72 (VCPM) - Body ground Always 10 kohms or higher D3-2 (E2) or D28-71 (EPIM) - Body ground D3-1 (PIM) or D28-69 (PIM) - Body ground Reconnect the manifold absolute pressure sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM) OK --> See step 6
  4. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Replace the manifold absolute pressure sensor. Refer to «REMOVAL»(ref-393178-S01480003242011040700000) . NEXT: Go to next step
  5. CHECK WHETHER DTC OUTPUT RECURS (P0107 OR P0108) Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Clear the DTC and turn the power switch off. Turn the power switch on (IG) and wait for 5 seconds. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC P0107 or P0108 is output B B --> See step 6 A --> END
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)

Scheme 273

Scheme 273: DESCRIPTION
Scheme 273: DESCRIPTION
  1. The intake air temperature sensor, mounted in the mass air flow meter sub-assembly, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes ( see scheme 1see scheme 1 ).
  2. The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R which is located inside the ECM.
  3. Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, according to changes in the intake air temperature, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.
DTC No.DTC Detection ConditionTrouble Area
P0111When either of following conditions are met (2 trip detection logic): In duration between engine warmed up and next engine starts, change in intake air temperature sensor output below threshold During engine warming up after cold engine starts, change in intake air temperature sensor output bellow thresholdMass air flow meter sub-assembly

HINT

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

Scheme 274

Scheme 274: PROCEDURE
Scheme 274: PROCEDURE

Scheme 275

Scheme 275
Scheme 275

Scheme 276

Scheme 276
Scheme 276

Scheme 277

Scheme 277
Scheme 277
  1. READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Intake Air. Read the value displayed on the Techstream. OK Same as actual intake air temperature. Result Result Proceed to -40°C (-40°F) A 140°C (284°F) B Same as actual intake air temperature C HINT: If there is an open circuit, the Techstream indicates -40°C (-40°F). If there is a short circuit, the Techstream indicates 140°C (284°F). C --> See step 4 B --> See step 7 A: Go to next step
  2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Confirm good connection at the mass air flow meter sub-assembly. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter Sub-assembly *2 ECM *3 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) - - Disconnect the mass air flow meter sub-assembly connector. Connect terminals THA and E2 of the mass air flow meter sub-assembly connector on the wire harness side. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air. Read the value displayed on the Techstream. Standard 140°C (284°F) Reconnect the mass air flow meter sub-assembly connector. NG --> See step 3 OK --> See step 5
  3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) Disconnect the mass air flow meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D5-1 (THA) - D28-116 (THA) Always Below 1 ohms D5-2 (E2) - D28-93 (ETHA) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) *2 Front view of wire harness connector (to ECM) Reconnect the mass air flow meter sub-assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) OK --> See step 6
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)
  5. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-393185-S21730933332011040700000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  7. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the mass air flow meter sub-assembly connector. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter Sub-assembly *2 ECM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Intake Air. Read the value displayed on the Techstream. Standard value -40°C (-40°F) Reconnect the mass air flow meter sub-assembly connector. NG --> See step 8 OK --> See step 9
  8. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) Disconnect the mass air flow meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D5-1 (THA) or D28-116 (THA) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) *2 Front view of wire harness connector (to ECM) Reconnect the mass air flow meter sub-assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) OK --> See step 10
  9. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-393185-S21730933332011040700000)
  10. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)

HINT

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

Scheme 278

Scheme 278: PROCEDURE
Scheme 278: PROCEDURE

Scheme 279

Scheme 279
Scheme 279

Scheme 280

Scheme 280
Scheme 280

Scheme 281

Scheme 281
Scheme 281
  1. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: 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 Result Proceed to -40°C (-40°F) A 140°C (284°F) or more 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 more. C --> See step 4 B --> See step 7 A: Go to next step
  2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) Confirm good connection at the engine coolant temperature sensor connector. TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM *3 Front view of wire harness connector (to Engine Coolant Temperature Sensor) - - Disconnect the engine coolant temperature sensor connector. Connect terminals THW and E2 of the engine coolant temperature sensor connector on the wire harness side. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard 140°C (284°F) or more Reconnect the engine coolant temperature sensor connector. NG --> See step 3 OK --> See step 5
  3. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D6-2 (THW) - D28-64 (THW) Always Below 1 ohms D6-1 (E2) - D28-65 (ETHW) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Engine Coolant Temperature Sensor) *2 Front view of wire harness connector (to ECM) Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) OK --> See step 6
  4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)
  5. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-393185-S16232441422011040700000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  7. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the engine coolant temperature sensor connector. TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard value -40°C (-40°F) Reconnect the engine coolant temperature sensor connector. NG --> See step 8 OK --> See step 9
  8. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the engine coolant temperature sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D6-2 (THW) or D28-64 (THW) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Engine Coolant Temperature Sensor) *2 Front view of wire harness connector (to ECM) Reconnect the engine coolant temperature sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) OK --> See step 10
  9. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-393185-S16232441422011040700000)
  10. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)

HINT

  1. If any of DTCs P0115, P0117, P0118 or P0125 is set simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

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

HINT

  1. DTC P0121 is stored when the voltages output from VTA1 and VTA2 are not consistent with the characteristics of the sensors. Therefore, check the Freeze Frame Data when this DTC is output. Use the following formula to confirm relative fluctuations in voltage. Features of sensor output VTA2 x 0.8 is approximately equal to VTA1 + 1.11 V VTA1: Throttle Position No. 1 VTA2: Throttle position No. 2
  2. If DTC P0121 is output, proceed to "CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)".
  3. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

Scheme 282

Scheme 282: PROCEDURE
Scheme 282: PROCEDURE

Scheme 283

Scheme 283
Scheme 283
  1. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the throttle body assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D4-5 (VC) - D28-88 (VCTA) Always Below 1 ohms D4-6 (VTA) - D28-90 (VTA1) Always Below 1 ohms D4-4 (VTA2) - D28-89 (VTA2) Always Below 1 ohms D4-3 (E2) - D28-111 (ETA) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D4-5 (VC) or D28-88 (VCTA) - Body ground Always 10 kohms or higher D4-6 (VTA) or D28-90 (VTA1) - Body ground Always 10 kohms or higher D4-4 (VTA2) or D28-89 (VTA2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Throttle Body Assembly) *2 Front view of wire harness connector (to ECM) Reconnect the throttle body assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE POSITION SENSOR - ECM) OK: Go to next step
  2. INSPECT ECM (VC VOLTAGE) Disconnect the throttle body assembly connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D4-5 (VC) - D4-3 (E2) Power switch on (IG) 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Throttle Body Assembly) Reconnect the throttle body assembly connector. NG --> See step 5 OK: Go to next step
  3. REPLACE THROTTLE BODY ASSEMBLY Replace the throttle body assembly. Refer to «REMOVAL»(ref-393185-S27458206012011040700000) . NEXT: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0120, P0121, P0122, P0123, P0220, P0222, P0223 and/or P2135 is output A DTC is not output B B --> END A --> See step 6
  5. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)

HINT

  1. If any of DTCs P0115, P0116, P0117 or P0118 is set simultaneously with DTC P0125, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

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

HINT

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

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

Scheme 284

Scheme 284: INSPECTION PROCEDURE
Scheme 284: INSPECTION PROCEDURE

Scheme 285

Scheme 285
Scheme 285

Scheme 286

Scheme 286
Scheme 286
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) .
  4. Start the engine.
  5. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
  6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
  7. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
  8. Monitor the voltage outputs of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (Air fuel ratio) +25% Rich Less than 3.1 V AFS Voltage B1S1 (Air fuel ratio) -12.5% Lean More than 3.4 V O2S B1S2 (Heated oxygen) +25% Rich More than 0.55 V O2S B1S2 (Heated oxygen) -12.5% Lean Less than 0.4 V NOTE: The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich) Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors. To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2. NOTE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred. If the OX1B wire from the ECM connector is short-circuited to the +B wire, DTC P0136 will be set.

Scheme 287

Scheme 287: PROCEDURE
Scheme 287: PROCEDURE

Scheme 288

Scheme 288
Scheme 288

Scheme 289

Scheme 289
Scheme 289

Scheme 290

Scheme 290
Scheme 290

Scheme 291

Scheme 291
Scheme 291

Scheme 292

Scheme 292
Scheme 292
  1. READ DTC OUTPUT (DTC P0136, P0137, P0138 OR P0139) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0138 is output A DTC P0137 is output B DTC P0136 is output C DTC P0139 is output D D --> See step 28 C --> See step 9 B --> See step 13 A: Go to next step
  2. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / A/F Control System / O2S B1S2. Allow the engine to idle. Read the heated oxygen sensor output voltage while idling. Result Result Proceed to 1.0 V or more A Less than 1.0 V B B --> See step 7 A: Go to next step
  3. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 36 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR Turn the power switch off and wait for 5 minutes or more. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D28-41 (HT1B) - D28-125 (OX1B) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) OK: Go to next step
  5. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 6 OK --> See step 37
  6. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> See step 37
  7. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream and monitor the voltage output of air fuel ratio and heated oxygen sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The air fuel ratio sensor is displayed as AFS Voltage B1S1, and the heated oxygen sensor is displayed as O2S B1S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Result Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (Air fuel ratio) Alternates between more and less than 3.3 V OK Remains at more than 3.3 V NG Remains at less than 3.3 V NG HINT: A normal heated oxygen sensor voltage (O2S B1S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 22 OK: Go to next step
  8. INSPECT AIR FUEL RATIO SENSOR HINT: This air fuel ratio sensor test is to check the air fuel ratio sensor current during the fuel-cut. When the sensor is normal, the sensor current will indicate below 3.0 mA in this test. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Drive the vehicle according to the drive pattern listed below: Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Warm up the engine until the engine coolant temperature reaches 75°C (167°F) or more. Drive the vehicle at 47 mph (75 km/h) or more and decelerate the vehicle for 6 seconds or more. Repeat the deceleration above at least 3 times. Enter the following menus: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details. Confirm that RANGE B1S1 is either Pass or Fail. If the Techstream shows Incomplete, re-check RANGE B1S1 after performing the drive pattern. Select the RANGE B1S1. Read the Test Value. Standard current Less than 3.0 mA HINT: If the Techstream shows Incomplete again, add the vehicle speed and move the shift lever to B to decelerate the vehicle. NG --> See step 22 OK --> See step 16
  9. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream and monitor the voltage output of heated oxygen sensor displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The heated oxygen sensor is displayed as O2S B1S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Standard Fluctuates between 0.4 V or less and 0.55 V or more. NG --> See step 13 OK: Go to next step
  10. PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream and monitor the voltage output of air fuel ratio and heated oxygen sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The air fuel ratio sensor is displayed as AFS Voltage B1S1, and the heated oxygen sensor is displayed as O2S B1S2 on the Techstream. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Result Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (Air fuel ratio) Alternates between more and less than 3.3 V OK Remains at more than 3.3 V NG Remains at less than 3.3 V NG HINT: A normal heated oxygen sensor voltage (O2S B1S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 22 OK: Go to next step
  11. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 12 OK --> CHECK EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO AND REPAIR CAUSE (FUEL INJECTOR ASSEMBLY, FUEL PRESSURE, GAS LEAK FROM SYSTEM)
  12. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> CHECK EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO AND REPAIR CAUSE (FUEL INJECTOR ASSEMBLY, FUEL PRESSURE, GAS LEAK FROM SYSTEM)
  13. CHECK EXHAUST GAS LEAK Inspect for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
  14. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HT1B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT1B) - 4 (E2) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor (Sensor 2)) Reconnect the heated oxygen sensor connector. NG --> See step 36 OK: Go to next step
  15. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the heated oxygen sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D9-1 (HT1B) - D28-41 (HT1B) Always Below 1 ohms D9-3 (OX1B) - D28-125 (OX1B) D9-4 (E2) - D28-102 (O1B-) Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D9-1 (HT1B) or D28-41 (HT1B) - Body ground Always 10 kohms or higher D9-3 (OX1B) or D28-125 (OX1B) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Heated Oxygen Sensor) *2 Front view of wire harness connector (to ECM) Reconnect the heated oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) OK: Go to next step
  16. REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor. Refer to «REMOVAL»(ref-393185-S05487932482011040700000) . NEXT: Go to next step
  17. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Turn the Techstream off. Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137or P0138. NEXT: Go to next step
  18. CHECK WHETHER DTC OUTPUT RECURS (P0136, P0137 OR P0138) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTCs: P0136, P0137 and P0138. Check the DTC judgement result is NORMAL. If it is INCOMPLETE, perform the drive pattern adding the vehicle speed. Result Result Proceed to ABNORMAL (DTC P0136, P0137 or P0138 is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
  19. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 20 OK --> See step 21
  20. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> See step 21
  21. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-393185-S15352357012011040700000)
  22. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-393185-S15352357012011040700000) . NEXT: Go to next step
  23. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Turn the Techstream off. Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern for P0136, P0137or P0138. NEXT: Go to next step
  24. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136 OR P0138) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTCs: P0136 or P0138. Check the DTC judgement result is NORMAL. If it is INCOMPLETE, perform the drive pattern adding the vehicle speed. Result Result Proceed to ABNORMAL (DTC P0136 or P0138 is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
  25. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 26 OK --> See step 36
  26. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> See step 27
  27. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-393185-S05487932482011040700000)
  28. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / A/F Control System / O2S B1S2. Allow the engine to idle. Read the heated oxygen sensor output voltage while idling. Result Result Proceed to 1.0 V or more A Less than 1.0 V B B --> See step 33 A: Go to next step
  29. INSPECT HEATED OXYGEN SENSOR Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) TEXT IN ILLUSTRATION *1 Component without harness connected (Heated Oxygen Sensor) Reconnect the heated oxygen sensor connector. NG --> See step 36 OK: Go to next step
  30. CHECK HARNESS OR CONNECTOR (CHECK FOR SHORT) Turn the power switch off and wait for 5 minutes or more. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D28-41 (HT1B) - D28-125 (OX1B) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) OK --> See step 37
  31. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 32 OK --> See step 37
  32. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> See step 37
  33. READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Clear the DTC (even if no DTC are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on [A]. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more [B]. Drive the vehicle at 47 mph (75 km/h), and then decelerate the vehicle by releasing the accelerator pedal for 6 seconds or more to perform the fuel cut [C]. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input DTC: P0139. Check the DTC Monitor is NORMAL. If DTC Monitor is INCOMPLETE, perform the drive pattern increasing the vehicle speed and move the shift lever in B to decelerate the vehicle. Result Result Proceed to ABNORMAL (DTC P0139 is output) A NORMAL (DTC is not output) B B --> See step 38 A: Go to next step
  34. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. NG --> See step 35 OK --> See step 36
  35. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 39 OK --> See step 36
  36. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-393185-S05487932482011040700000)
  37. REPLACE ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000)
  38. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-393183-S06096913442011040700000)
  39. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(ref-393178-S00297409822011040700000)

HINT

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

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

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) .
  4. Start the engine.
  5. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
  6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
  7. Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
  8. Monitor the voltage outputs of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (Air fuel ratio) +25% Rich Less than 3.1 V AFS Voltage B1S1 (Air fuel ratio) -12.5% Lean More than 3.4 V O2S B1S2 (Heated oxygen) +25% Rich More than 0.55 V O2S B1S2 (Heated oxygen) -12.5% Lean Less than 0.4 V NOTE: The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich) Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors. To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2. NOTE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred. A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich. A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.

Scheme 293

Scheme 293
Scheme 293
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171 OR P0172) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0171 or P0172 is output A DTC P0171 or P0172 and other DTCs are output B HINT: If any DTCs other than P0171 or P0172 are output, troubleshoot those DTCs first. B --> See step 20 A: Go to next step
  2. CHECK PCV HOSE CONNECTIONS Inspect 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 INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(ref-393188-S17081193942011040700000) . OK No leaks in intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
  4. PERFORM ACTIVE TEST USING TECHSTREAM (AIR FUEL RATIO CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine. 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 sensor and the heated oxygen sensor (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. 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 Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (air fuel ratio) +25% Rich Less than 3.1 V -12.5% Lean More than 3.4 V O2S B1S2 (heated oxygen) +25% Rich More than 0.55 V -12.5% Lean Less than 0.4 V RESULT Status AFS Voltage B1S1 Status O2S B1S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition Misfire Suspected Trouble Area Proceed to Lean/Rich Lean/Rich Normal - - C Lean Lean Actual air fuel ratio lean May occur PCV valve and hose PCV hose connections Fuel injector assembly blockage Gas leaks from exhaust system Intake system Fuel pressure Mass air flow meter sub-assembly Engine coolant temperature sensor A Rich Rich Actual air fuel ratio rich - Fuel injector assembly leakage or blockage Gas leaks from exhaust system Ignition system Fuel pressure Mass air flow meter sub-assembly Engine coolant temperature sensor Lean Lean/Rich Air fuel ratio sensor malfunction - Air fuel ratio sensor B Rich Lean/Rich Air fuel ratio sensor malfunction - Air fuel ratio sensor Lean: During Control the Injection Volume for A/F Sensor, the air fuel ratio sensor output voltage (AFS Voltage) is consistently more than 3.4 V, and the heated oxygen sensor output voltage (O2S) is consistently less than 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS Voltage is consistently less than 3.1 V, and the O2S is consistently more than 0.55 V. Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the heated oxygen sensor alternates correctly. C --> See step 15 B --> See step 11 A: Go to next step
  5. READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Read the Data List twice, when the engine is both cold and warmed up. Standard value With cold engine: Same as ambient air temperature. With warm engine: 80 to 100°C (176 to 212°F). NG --> See step 21 OK: Go to next step
  6. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Inspect the mass air flow meter sub-assembly. Refer to «ON-VEHICLE INSPECTION»(ref-393185-S14355653952011040700000) . NG --> See step 22 OK: Go to next step
  7. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-393193-S00724245252011040700000) . NG --> REPAIR OR REPLACE FUEL SYSTEM OK: Go to next step
  8. INSPECT FOR EXHAUST GAS LEAK Inspect for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
  9. CHECK SPARK AND IGNITION HINT: Refer to the ignition system inspection procedure. Refer to «ON-VEHICLE INSPECTION»(ref-393176-S08627276772011040700000) . If the spark plugs or ignition system malfunctions, engine misfires may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / Cylinder #1 Misfire Count (to Cylinder #4 Misfire Count). NG --> REPAIR OR REPLACE IGNITION SYSTEM OK: Go to next step
  10. INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME) HINT: Refer to the fuel injector inspection procedure. Refer to «INSPECTION»(ref-393187-S29117220602011040700000) . If the injectors malfunction, engine misfires may occur. The misfire count can be read using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / Cylinder #1 Misfire Count (to Cylinder #4 Misfire Count). Result Result Proceed to NG A OK B B --> See step 16 A --> See step 23
  11. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the air fuel ratio sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> See step 24 OK: Go to next step
  12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR) Disconnect the air fuel ratio sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition D24-2 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Fuel Ratio Sensor) Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - EFI MAIN RELAY) OK: Go to next step
  13. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D24-1 (HA1A) - D28-18 (HA1A) Always Below 1 ohms D24-3 (A1A+) - D28-103 (A1A+) Always Below 1 ohms D24-4 (A1A-) - D28-126 (A1A-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D24-1 (HA1A) or D28-18 (HA1A) - Body ground Always 10 kohms or higher D24-3 (A1A+) or D28-103 (A1A+) - Body ground Always 10 kohms or higher D24-4 (A1A-) or D28-126 (A1A-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Fuel Ratio Sensor) *2 Front view of wire harness connector (to ECM) Reconnect the air fuel ratio sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - ECM) OK: Go to next step
  14. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-393185-S15352357012011040700000) . NEXT: Go to next step
  15. PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the power and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0171, P0172. Check the DTC judgment result. Result Result Proceed to ABNORMAL (DTC P0171 or P0172 is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
  16. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position when Throttle Idle Position is ON in Data List. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 18 A: Go to next step
  17. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-393178-S00297409822011040700000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. Reinstall the EGR valve assembly. Refer to «INSTALLATION»(ref-393178-S33053900042011040700000) . NG --> See step 25 OK: Go to next step
  18. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-393185-S12311789002011040700000) . NEXT: Go to next step
  19. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTCs: P0171, P0172. Check the DTCs judgment result. NEXT --> END
  20. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-393183-S20320380732011040700000)
  21. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-393185-S16232441422011040700000)
  22. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-393185-S21730933332011040700000)
  23. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-393187-S06360802702011040700000)
  24. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-393185-S15352357012011040700000)
  25. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(ref-393178-S00297409822011040700000)

More articles — Engine Control (Sfi) System (Diagnostic Codes (P0010-P0171)) (Except Phv)