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Engine Control System (2ZR-FXE) (Diagnostic Codes (P0010 - P0172)): Diagnosis Lexus CT I

Testing & Diagnostics 18 illustrations ~9621 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.

HINT

  1. DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
  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 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 160

Scheme 160: PROCEDURE
Scheme 160: PROCEDURE

Scheme 161

Scheme 161
Scheme 161
  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 9 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly using the Techstream. OK Techstream Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT: If the result is not acceptable, cool the engine (engine coolant temperature is 50°C (122°F) or less) and perform the Active Test again. Test not possible with park (P) selected during charge control. Move shift lever to N to perform test. NG --> See step 4 OK: Go to next step
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-568607-S14015113742013072300000) . HINT: P0011 is output: Clear the DTC without using the Techstream. P0012 is output: Clear the DTC with using the Techstream. 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 HINT: DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter. B --> See step 7 A --> See step 14
  4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Inspect the camshaft timing oil control valve assembly. Refer to «INSPECTION»(ref-568740-S32860759972013072300000) . NG --> See step 10 OK: Go to next step
  5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY Inspect the camshaft timing gear assembly. Refer to «DISASSEMBLY - Step 31»(ref-568735-S04060873502013072300000) . NG --> See step 13 OK: Go to next step
  6. INSPECT OIL CONTROL VALVE FILTER Remove the oil control valve filter. Refer to «DISASSEMBLY - Step 41»(ref-568735-S04060873502013072300000) . Check that the filter is not clogged. OK Filter is not clogged. NG --> See step 11 OK: Go to next step
  7. 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 «REASSEMBLY»(ref-568735-S26175645512013072300000) . TEXT IN ILLUSTRATION *a Top *b Alignment Mark *c No. 1 Cylinder at TDC Compression NEXT: Go to next step
  8. 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-568607-S14015113742013072300000) . HINT: P0011 is output: Clear the DTC without using the Techstream. P0012 is output: Clear the DTC with using the Techstream. 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 12 A --> END
  9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568607-S40570208092013072300000)
  10. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-568740-S41768377262013072300000)
  11. REPLACE OIL CONTROL VALVE FILTER. Refer to «DISASSEMBLY - Step 41»(ref-568735-S04060873502013072300000)
  12. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  13. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY. Refer to «DISASSEMBLY - Step 32»(ref-568735-S04060873502013072300000)
  14. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)

HINT

  1. DTC P0016 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
  2. Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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

HINT

  1. Refer to "Data List / Active Test" [A/F Heater Duty #1]. Refer to «DATA LIST / ACTIVE TEST»(ref-568607-S17841424132013072300000) .
  2. Sensor 1 refers to the sensor closest to the engine assembly.
  3. Sensor 2 refers to the sensor farthest away from the engine assembly.
  4. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
  5. Change the fuel injection volume using the Control the Injection Volume function provided in the Active Test and monitor the air fuel ratio sensor output voltage. Refer to «INSPECTION PROCEDURE»(ref-568738-S13664173822013072300000) . If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

Scheme 162

Scheme 162: PROCEDURE
Scheme 162: PROCEDURE
  1. INSPECT AIR FUEL RATIO SENSOR NO. 2 (HEATER RESISTANCE) Inspect the air fuel ratio sensor. Refer to «INSPECTION»(ref-568740-S21648399742013072300000) . NG --> See step 5 OK: Go to next step
  2. 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 Condition Specified Condition D23-2 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Air Fuel Ratio Sensor (Sensor 1)) 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 Tester Connection Condition Specified Condition D23-1 (HA1A) - D27-18 (HA1A) Always Below 1 ohms D23-1 (HA1A) or D27-18 (HA1A) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0031, P0032 OR P101D) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-568607-S14015113742013072300000) . 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 is not output A DTC P0031, P0032 or P101D is output B B --> See step 7 A --> See step 6
  5. REPLACE AIR FUEL RATIO SENSOR NO. 2. Refer to «REMOVAL»(ref-568740-S38248071332013072300000)
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)

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

HINT

  1. Refer to "Data List / Active Test" [O2 Heater B1S2, O2 Heater Curr Val B1S2]. Refer to «DATA LIST / ACTIVE TEST»(ref-568607-S17841424132013072300000) .
  2. Sensor 1 refers to the sensor closest to the engine assembly.
  3. Sensor 2 refers to the sensor farthest away from the engine assembly.
  4. When the values for the Data List items O2 Heater Curr Val B1S2 is not 0 A, the heater is on.
  5. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
  6. Change the fuel injection volume using the Control the Injection Volume function provided in the Active Test and monitor the heated oxygen sensor output voltage. Refer to «INSPECTION PROCEDURE»(ref-568738-S13664173822013072300000) . If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

Scheme 163

Scheme 163: PROCEDURE
Scheme 163: PROCEDURE
  1. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Inspect the heated oxygen sensor. Refer to «INSPECTION»(ref-568740-S10162408252013072300000) . NG --> See step 6 OK: Go to next step
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF HEATED OXYGEN SENSOR) 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 Condition Specified Condition D9-2 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of harness connector (to Heated Oxygen Sensor (Sensor 2)) 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 Tester Connection Condition Specified Condition D9-1 (HT1B) - D27-41 (HT1B) Always Below 1 ohms D9-1 (HT1B) or D27-41 (HT1B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038, P0141 OR P102D) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-568607-S14015113742013072300000) . 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 5 A --> See step 7
  5. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  6. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-568740-S37859507562013072300000)
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)

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 164

Scheme 164: PROCEDURE
Scheme 164: PROCEDURE
  1. READ DTC OUTPUT (DTC P0102 OR P0103) 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. CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY) 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 Condition Specified Condition D5-3 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - EFI MAIN RELAY) 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 Tester Connection Condition Specified Condition D5-5 (VG) - D27-94 (VG) Always Below 1 ohms D5-4 (E2G) - D27-117 (E2G) Always Below 1 ohms D5-5 (VG) or D27-94 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Perform On-vehicle inspection. Refer to «ON-VEHICLE INSPECTION»(ref-568740-S11426188722013072300000) . Perform Inspection. Refer to «INSPECTION»(ref-568740-S17575267492013072300000) . Inspect the function of the mass air flow meter sub-assembly. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / MAF. Check that the reading of MAF value changes when the engine is raced. OK The reading changes. NG --> See step 8 OK --> See step 7
  5. CHECK HARNESS AND CONNECTOR (SENSOR GROUND) Disconnect the mass air flow meter 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 NG --> See step 6 OK --> See step 8
  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 Tester Connection Condition Specified Condition D5-4 (E2G) - D27-117 (E2G) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  7. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  8. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-568740-S27089628202013072300000)

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 165

Scheme 165: PROCEDURE
Scheme 165: 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 / Primary / MAP. Read the MAP value. OK Same value as the actual atmospheric pressure. HINT: Standard atmospheric pressure is 101 kPa (758 mmHg). For every 100 m (328 ft.) increase in altitude, pressure drops by 1 kPa (7.5 mmHg). 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 (POWER SOURCE OF 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 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) 3.0 to 5.0 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Manifold Absolute Pressure Sensor) RESULT Result Proceed to Outside of 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 Tester Connection Condition Specified Condition D3-3 (VC) - D27-72 (VCPM) Always Below 1 ohms D3-2 (E2) - D27-71 (EPIM) Always Below 1 ohms D3-1 (PIM) - D27-69 (PIM) Always Below 1 ohms D3-3 (VC) or D27-72 (VCPM) - Body ground Always 10 kohms or higher D3-2 (E2) or D27-71 (EPIM) - Body ground Always 10 kohms or higher D3-1 (PIM) or D27-69 (PIM) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Replace the manifold absolute pressure sensor. Refer to «REMOVAL»(ref-568729-S19989838632013072300000) . NEXT: Go to next step
  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0107 OR P0108) Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-568607-S14015113742013072300000) . Drive the vehicle in accordance with the diving 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 is not output A DTC P0107 or P0108 is output B B --> See step 6 A --> END
  6. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)

Scheme 166

Scheme 166: DESCRIPTION
Scheme 166: 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 1above).
  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 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 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 167

Scheme 167: PROCEDURE
Scheme 167: PROCEDURE

Scheme 168

Scheme 168
Scheme 168
  1. READ VALUE USING TECHSTREAM (INTAKE AIR) 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 / Primary / 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 Higher than 128°C (262°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 higher than 128°C (262°F). 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 mass air flow meter sub-assembly connector. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter Sub-assembly *2 ECM *a Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly) - - Connect terminals 1 (THA) and 2 (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 / Primary / Intake Air. Read the value displayed on the Techstream. Standard value Higher than 128°C (262°F) NG --> See step 3 OK --> See step 7
  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 Tester Connection Condition Specified Condition D5-1 (THA) - D27-116 (THA) Always Below 1 ohms D5-2 (E2) - D27-93 (ETHA) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
  4. 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 / Data List / Primary / Intake Air. Read the value displayed on the Techstream. Standard value -40°C (-40°F) NG --> See step 5 OK --> See step 9
  5. 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 Tester Connection Condition Specified Condition D5-1 (THA) or D27-116 (THA) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)
  7. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-568740-S27089628202013072300000)
  8. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  9. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(ref-568740-S27089628202013072300000)
  10. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)

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 169

Scheme 169: PROCEDURE
Scheme 169: PROCEDURE

Scheme 170

Scheme 170
Scheme 170
  1. 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 / Primary / Coolant Temp. Read the value displayed on the Techstream. Standard value Between 75°C and 100°C (167°F and 212°F) with warm engine. RESULT Result Proceed to -40°C (-40°F) A Higher than 135°C (275°F) B Between 75°C and 100°C (167°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 higher than 135°C (275°F). 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 engine coolant temperature sensor connector. TEXT IN ILLUSTRATION *1 Engine Coolant Temperature Sensor *2 ECM *a Front view of wire harness connector (to Engine Coolant Temperature Sensor) - - Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp. Read the value displayed on the Techstream. Standard value Higher than 135°C (275°F) NG --> See step 3 OK --> See step 7
  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 Tester Connection Condition Specified Condition D6-2 - D27-64 (THW) Always Below 1 ohms D6-1 - D27-65 (ETHW) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
  4. 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 / Primary / Coolant Temp. Read the value displayed on the Techstream. Standard value -40°C (-40°F) NG --> See step 5 OK --> See step 9
  5. 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 Tester Connection Condition Specified Condition D6-2 or D27-64 (THW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)
  7. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-568740-S16880215132013072300000)
  8. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)
  9. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-568740-S16880215132013072300000)
  10. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)

HINT

  1. If any of DTCs P0115, P0117 or P0118 are output 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. 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
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

Scheme 171

Scheme 171: PROCEDURE
Scheme 171: PROCEDURE
  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 Tester Connection Condition Specified Condition D4-5 (VC) - D27-88 (VCTA) Always Below 1 ohms D4-6 (VTA) - D27-90 (VTA1) Always Below 1 ohms D4-4 (VTA2) - D27-89 (VTA2) Always Below 1 ohms D4-3 (E2) - D27-111 (ETA) Always Below 1 ohms D4-5 (VC) or D27-88 (VCTA) - Body ground Always 10 kohms or higher D4-6 (VTA) or D27-90 (VTA1) - Body ground Always 10 kohms or higher D4-4 (VTA2) or D27-89 (VTA2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR 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 *a Front view of wire harness connector (to Throttle Body Assembly) NG --> See step 5 OK: Go to next step
  3. REPLACE THROTTLE BODY ASSEMBLY Replace the throttle body assembly. Refer to «REMOVAL»(ref-568740-S27680346492013072300000) . 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-568607-S14015113742013072300000) . 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-568740-S18557757702013072300000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)

HINT

  1. If any of DTCs P0115, P0117 or P0118 are output 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

  1. 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.
  2. When the DTC is output, check the engine coolant temperature using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp. If the Coolant Temp value is lower than the actual engine coolant temperature, the engine coolant temperature sensor circuit may be malfunctioning. In this case, check the wire harnesses and connectors (and those connections) between the ECM and the engine coolant temperature sensor first.

HINT

Malfunctioning areas can be identified by performing the Control the Injection Volume function provided in the Active Test. The Control the Injection Volume 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 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) .
  4. Start the engine.
  5. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, warm up the engine after charging control has completed.
  6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas AF Control / AFS Voltage B1S1 and O2S B1S2.
  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: Change the fuel injection volume within the range of -12% to +12%. The injection volume can be changed in fine gradations. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (Air fuel ratio) +12% Rich Below 3.1 V AFS Voltage B1S1 (Air fuel ratio) -12% Lean Higher than 3.4 V O2S B1S2 (Heated oxygen) +12% Rich Higher than 0.55 V O2S B1S2 (Heated oxygen) -12% Lean Below 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 4 Fuel injector assembly Fuel pressure Gas leak from exhaust system (Air fuel ratio extremely rich or lean)

Scheme 172

Scheme 172
Scheme 172

Scheme 173

Scheme 173
Scheme 173

Scheme 174

Scheme 174
Scheme 174

Scheme 175

Scheme 175
Scheme 175
  1. Following the Control the Injection Volume procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
  2. To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Gas AF Control / AFS Voltage B1S1 and O2S B1S2; and then press the graph button on the Data List view.

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

HINT

  1. Read freeze frame data using the Techstream. 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.
  2. Sensor 1 refers to the sensor closest to the engine assembly.
  3. Sensor 2 refers to the sensor farthest away from the engine assembly.

Scheme 176

Scheme 176: PROCEDURE
Scheme 176: PROCEDURE

Scheme 177

Scheme 177
Scheme 177
  1. READ OUTPUT DTC (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 DTC P0136, P0137 or P0138 and other DTCs are output E B --> See step 8 C --> See step 4 D --> See step 21 E --> See step 32 A: Go to next step
  2. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the heated oxygen sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (+B) - 4 (E2) Always 10 kohms or higher 2 (+B) - 3 (OX1B) Always 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Heated Oxygen Sensor) NG --> See step 27 OK: Go to next step
  3. CHECK HARNESS AND 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 Tester Connection Condition Specified Condition D27-41 (HT1B) - D27-125 (OX1B) Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 33
  4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, warm up the engine after charging control has completed. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas AF Control / O2S B1S2. Change the fuel injection volume using the Techstream, and monitoring 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 fine gradations within this range. 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 higher. NG --> See step 8 OK: Go to next step
  5. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, warm up the engine after charging control has completed. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas AF Control / AFS Voltage B1S1 and O2S B1S2. Change the fuel injection volume using the Techstream, and monitoring 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 fine gradations within this 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. If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning. Result Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (Air fuel ratio) Alternates between more and below 3.3 V OK AFS Voltage B1S1 (Air fuel ratio) Remains at higher than 3.3 V NG AFS Voltage B1S1 (Air fuel ratio) Remains at below 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 below or higher than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 16 OK: Go to next step
  6. 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. 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 / Data List / Primary / MAP. 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. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls 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 7 OK --> See step 28
  7. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-568729-S20442253562013072300000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 31 OK --> See step 28
  8. CHECK EXHAUST GAS LEAK Check for exhaust gas leaks. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
  9. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Inspect the heated oxygen sensor. Refer to «INSPECTION»(ref-568740-S10162408252013072300000) . NG --> See step 27 OK: Go to next step
  10. 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 Tester Connection Condition Specified Condition D9-1 (HT1B) - D27-41 (HT1B) Always Below 1 ohms D9-3 (OX1B) - D27-125 (OX1B) Always Below 1 ohms D9-4 (E2) - D27-102 (O1B-) Always Below 1 ohms D9-1 (HT1B) or D27-41 (HT1B) - Body ground Always 10 kohms or higher D9-3 (OX1B) or D27-125 (OX1B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  11. REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor. Refer to «REMOVAL»(ref-568740-S37859507562013072300000) . NEXT: Go to next step
  12. PERFORM CONFIRMATION DRIVING PATTERN Perform Confirmation Driving Pattern (P0136, P0137 and P0138). NEXT: Go to next step
  13. CHECK WHETHER DTC OUTPUT RECURS (DTC 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 or P0138. Check that the DTC monitor is NORMAL. If DTC monitor is INCOMPLETE, perform again but increase 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
  14. 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. 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 / Data List / Primary / MAP. 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. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls 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 15 OK --> See step 30
  15. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-568729-S20442253562013072300000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 31 OK --> See step 30
  16. REPLACE AIR FUEL RATIO SENSOR NO. 2 Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-568740-S38248071332013072300000) . NEXT: Go to next step
  17. PERFORM CONFIRMATION DRIVING PATTERN Perform Confirmation Driving Pattern (P0136, P0137 and P0138). NEXT: Go to next step
  18. CHECK WHETHER DTC OUTPUT RECURS (DTC 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 or P0138. Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed. RESULT Result Proceed to ABNORMAL (DTC 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. 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 / Data List / Primary / MAP. 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. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls 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 27
  20. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-568729-S20442253562013072300000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 31 OK --> See step 27
  21. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST GAS LEAK POINT OK: Go to next step
  22. CHECK HARNESS AND 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 Tester Connection Condition Specified Condition D27-41 (HT1B) - D27-125 (OX1B) Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  23. PERFORM CONFIRMATION DRIVING PATTERN Perform Confirmation Driving Pattern (P0139). NEXT: Go to next step
  24. READ DTC OUTPUT (DTC P0139 IS OUTPUT AGAIN) 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 / Pending. Read the pending DTCs. RESULT Result Proceed to DTC P0139 is output A DTC is not output B B --> See step 29 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. 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 / Data List / Primary / MAP. 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. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls 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 27
  26. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-568729-S20442253562013072300000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 31 OK --> See step 27
  27. REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-568740-S37859507562013072300000)
  28. CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (FUEL INJECTOR ASSEMBLY, FUEL SYSTEM, INTAKE SYSTEM, ETC.). Refer to «DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1)»(ref-568738-S40951569342013072300000)
  29. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-568607-S36791760822013072300000)
  30. REPLACE AIR FUEL RATIO SENSOR NO. 2. Refer to «REMOVAL»(ref-568740-S38248071332013072300000)
  31. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(ref-568729-S20442253562013072300000)
  32. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-568607-S40570208092013072300000)
  33. REPLACE ECM. Refer to «REMOVAL»(ref-568740-S18557757702013072300000)

HINT

  1. A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
  2. A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
  3. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
  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

Malfunctioning areas can be identified by performing the Control the Injection Volume function provided in the Active Test. The Control the Injection Volume 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 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 (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) .
  4. Start the engine.
  5. Warm up the engine at an engine speed of 2500 RPM for approximately 90 seconds. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, warm up the engine after charging control has completed.
  6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas AF Control / AFS Voltage B1S1 and O2S B1S2.
  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: Change the fuel injection volume within the range of -12% to +12%. The injection volume can be changed in fine gradations. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (Air fuel ratio) +12% Rich Below 3.1 V AFS Voltage B1S1 (Air fuel ratio) -12% Lean Higher than 3.4 V O2S B1S2 (Heated oxygen) +12% Rich Higher than 0.55 V O2S B1S2 (Heated oxygen) -12% Lean Below 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 4 Fuel injector assembly Fuel pressure Gas leak from exhaust system (Air fuel ratio extremely rich or lean)

  1. Following the Control the Injection Volume procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
  2. To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Gas AF Control / AFS Voltage B1S1 and O2S B1S2; and then press the graph button on the Data List view.

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

  1. 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.
  2. 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.
  3. 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.
  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.

More articles — Engine Control System (2ZR-FXE) (Diagnostic Codes (P0010 - P0172))