Engine Control System [2GR-FE] [Diagnostic Codes [P1604-U0101] & Circ… — Engine Control System [2GR-FE] [Diagnostic Codes [P1604-U0101] & Circu — Testing & Diagnostics

INSPECTION PROCEDURE

HINT

In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1604 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as starting difficulty. As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
If any other DTCs are output, perform troubleshooting for those DTCs first.
When the Data List item "Immobiliser Fuel Cut" is ON, the engine cannot be started.
Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) .
When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
Try to start the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and compare it with the freeze frame data.
If the malfunction does not reoccur, carefully check the vehicle conditions from when the malfunction occurred using freeze frame data.
When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.
If the same inspection or replacement procedure appears 2 times when performing an inspection procedure, it is not necessary to repeat the procedure the second time.

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Malfunction Recurrence and Inspection Areas Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown. The engine speed recorded in the freeze frame data is 0 RPM (the engine does not crank). HINT: One of the following problems may be present: battery depletion, excess engine friction, a starter malfunction or a crankshaft position sensor malfunction. If the battery voltage is less than 6 V during cranking, there is a high probability that engine friction is abnormal. If the battery voltage drops to 5 V or less when starting the engine, the battery may be malfunctioning. If the battery voltage fluctuates while cranking the engine, it can be concluded that cranking is being performed. When the engine speed is 0 RPM, the crankshaft position sensor and/or an ECM may be malfunctioning. All engine speeds recorded in the freeze frame data are between 60 and 250 RPM (the engine cranks but there is no combustion). HINT: If the engine speed is between 60 and 250 RPM (no initial combustion), there may be a wiring problem or a complete failure of an ignition or fuel system part. Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and the engine may not be able to be started. The engine speed recorded in the freeze frame data is 250 RPM or higher (the initial combustion and starter turnoff timing is too late). HINT: If the engine speed is 250 RPM or higher (combustion occurs but the initial combustion and starter turnoff timing is too late), the fuel injection volume is often incorrect (too low or too high) and determining the cause of the malfunction is often difficult. Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and engine starting trouble may occur. If Long FT #1 is incorrect, there may be a fuel supply problem due to the injectors or fuel pump being clogged, etc. If the engine cranking speed is too high, compression loss may have occurred due to carbon interfering with the valve operation. When the malfunction (starting difficulty) can be reproduced, or malfunction conditions are known, perform the following inspections ("Problem symptoms" and "Systems to inspect") Problem symptoms The engine does not crank. HINT: The starter is normal if a noise that indicates the starter pinion gear is extending is heard. The battery may be fully depleted or there may be excess engine friction. The engine cranking speed is abnormal. HINT: If the engine cranking speed is too high (for example, 300 RPM or higher with no combustion), compression loss may have occurred because carbon interfered with valve operation, etc. There is no initial combustion. HINT: If there is no initial combustion, there is probably a wiring problem or an ignition or fuel system part malfunction. The engine stalls after starter turnoff. HINT: If the engine stalls after starter turnoff, the air fuel ratio may be incorrect or the VVT may have a problem returning. The initial combustion and starter turnoff occur late. HINT: If the initial combustion and starter turnoff occur late, the fuel injection volume is probably incorrect (too low or too high). HINT: Causes of fuel system malfunctions according to conditions present at the time of the malfunction. When 2 to 3 minutes have elapsed after stopping the engine: Fuel pressure loss due to the pressure regulator failing to maintain the fuel pressure. When 15 to 120 minutes have elapsed after stopping the engine: Problem with injector fuel seal. When a long time has elapsed after stopping the engine: Pressure regulator is stuck open. Systems to inspect. Intake system Ignition system Fuel system
INSPECTION FLOW Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown. Freeze Frame Data Item Result Suspected Area Procedure Engine Speed 0 RPM (no engine cranking at all) Battery fully depleted Engine assembly (excess friction) Starter Crankshaft position sensor ECM 4 to 9 60 to 250 RPM (engine cranks but no initial combustion*1) Fuel pump control system Ignition system Engine immobiliser system Engine coolant temperature sensor Fuel injection system 10 to 14 250 RPM or higher (combustion occurs but initial combustion and starter turnoff*2 occur late) Engine assembly (compression loss) Fuel injection system Fuel pump control system 15 to 24 HINT: *1: First combustion after cranking begins. *2: Condition when engine speed increases and starter can be turned off. When the malfunction (starting difficulty) can be reproduced, or when malfunction conditions are known. Problem symptoms Problem Symptom Suspected Area Suspected Component Procedure The engine does not crank Battery malfunction Battery fully depleted 26 to 31 Starting system Starter (includes pinion gear wear or tooth damage) Starting system Engine assembly Engine assembly (excess friction) Drive plate wear or tooth damage Cranking speed too low Battery malfunction Battery fully depleted 32 to 34 Starting system Starter assembly Engine assembly Engine assembly (excess friction) Cranking speed too high Engine assembly Engine assembly (compression loss) There is no initial combustion Fuel supply problem Cannot maintain pressure due to pressure regulator malfunction Fuel injector assembly leak Fuel leak from fuel line Fuel pump control system Fuel suction with pump and gauge tube assembly 35 to 50 Immobiliser system Engine immobiliser system Ignition system malfunction Spark plug Crankshaft position sensor Ignition coil assembly Engine stalls after starter turnoff Air suction Intake system connections 51 to 57 Deposits in throttle body Throttle with motor body assembly VVT valve does not return properly Camshaft timing oil control valve Mass air flow meter malfunction Mass air flow meter The initial combustion and starter turnoff occur late Engine coolant temperature sensor malfunction Engine coolant temperature sensor 58 to 71 Mass air flow meter malfunction Mass air flow meter Abnormal A/F learning value Air fuel ratio sensor Deviation from fuel injection characteristics Fuel injector assembly Wet-fouled or dry-fouled spark plug Spark plug Lack of fuel pressure Fuel suction with pump and gauge tube assembly Fuel pump control system Systems to inspect. Troubleshooting by System Suspected Area Suspected Component Procedure Fuel system troubleshooting A Abnormal A/F learning value Fuel injector assembly 88 to 95 96 to 103 Rough idling Crankshaft position sensor Abnormal fuel pressure Fuel Fuel leak from fuel line Fuel suction with pump and gauge tube assembly Fuel system troubleshooting B Abnormal concentration of HC in surge tank Purge VSV system Fuel injector assembly 104 to 106 Fuel system troubleshooting C Injection signal system malfunction Fuel injector assembly Crankshaft position sensor VVT sensor ECM 73 to 77 Intake system troubleshooting Difference between ISC target value and opening angle when idling Engine assembly (compression loss) Valve timing Engine coolant temperature sensor ECM 85 to 87 107 to 109 Ignition system troubleshooting VVT sensor and/or crankshaft position sensor signal malfunction Crankshaft position sensor system (including sensor installation) VVT sensor system (including sensor installation) ECM 78 to 84 110 to 116 NOTE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to «PRECAUTION»(ref-493943-S27942734662012081000000) . 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. Bank 1 refers to the bank that includes the No. 1 cylinder. Bank 2 refers to the bank that does not include the No. 1 cylinder.

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CHECK ANY OTHER DTCS OUTPUT AND RECORD FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs and record the Freeze Frame Data. HINT: This freeze frame data shows the actual engine conditions when engine starting trouble occurred. When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data. The fourth set of freeze frame data is the data recorded when then the DTC is stored. TEXT IN ILLUSTRATION *a DTC is stored *b 0.5 seconds *c Freeze frame data recorded point RESULT Result Proceed to Only DTC P1604 is output A DTCs other than P1604 are output B B --> See step 116 A: Go to next step
CHECK ENGINE IMMOBILISER SYSTEM HINT: If the vehicle is not equipped with a immobiliser system, proceed to next step (OK). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Immobiliser Fuel Cut. Read the value displayed on the Techstream. OK Immobiliser Fuel Cut is OFF RESULT Result Proceed to OK A NG (w/o Smart Key System) B NG (w/ Smart Key System) C HINT: If the engine is cranked immediately after reconnecting the battery cable (key verification for immobiliser system not completed), the engine cannot be started. Key verification needs to wait for several seconds after turning the ignition switch to ON. B --> See step 117 C --> See step 118 A: Go to next step
CHECK MALFUNCTION CONDITION Confirm the problem symptoms. RESULT Result Proceed to Freeze frame data exists, but the starting difficulty cannot be reproduced and it is unknown what kind of starting difficulty occurred A The problem symptoms can be reproduced, or the malfunction conditions are known B B --> See step 25 A: Go to next step
READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . RESULT Freeze Frame Data Item Suspected Area Proceed to Engine Speed Battery Voltage All 5 sets of freeze frame data are 0 RPM (no engine cranking at all) Minimum voltage is less than 5 V Battery fully depleted A Minimum voltage is 5 V or higher Starter malfunction Crankshaft position sensor system Excess engine friction ECM B 60 to 250 RPM (engine cranks but no initial combustion) - Fuel pump control system Ignition system Engine coolant temperature sensor Fuel injection system C 250 RPM or higher (combustion occurs but initial combustion and starter turnoff occur late) - Engine assembly Fuel injection system Fuel pump control system D RESULT Freeze Frame Data Item Suspected Area Proceed to Low Rev for Eng Start ON exists Intake system connections Throttle with motor body assembly Camshaft timing oil control valve assembly (for intake side of bank 1, 2) Camshaft timing oil control valve assembly (for exhaust side of bank 1, 2) Mass air flow meter E HINT: When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E. *1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine. *2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items. Immobiliser Fuel Cut Engine Speed (Starter Off) Shift SW Status (R, D Range) B --> See step 5 C --> See step 10 D --> See step 15 E --> See step 51 A --> CHARGE OR REPLACE BATTERY
READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . RESULT Freeze Frame Data Item Result Suspected Area Proceed to Battery Voltage Minimum voltage is 6 V or higher and voltage does not fluctuate*1 Starter system A*5 B*6 Minimum voltage is 6 V or higher and voltage fluctuates*2, *3 Crankshaft position sensor system ECM C Minimum voltage is 5 to 6 V*4 Excess engine friction Battery fully depleted D HINT: *1: The 5 sets of freeze frame data show approximately the same battery voltage. *2: The 5 sets of freeze frame data show different battery voltages. *3: If the voltage fluctuates, it can be determined that cranking is being performed. When the engine speed is 0 RPM, the crankshaft position sensor system and/or the ECM may be malfunctioning. *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts. *5: w/o Smart key system *6: w/ Smart key system TEXT IN ILLUSTRATION *a Freeze Frame Data *b Voltage does not Fluctuate *c Voltage Fluctuates B --> See step 120 C --> See step 6 D --> CHECK AND REPAIR ENGINE OR BATTERY A --> See step 119
CHECK CRANKSHAFT POSITION SENSOR INSTALLATION Check the tightening and installation condition of the crankshaft position sensor bolt. Check the connection of the crankshaft position sensor connector. NG --> See step 121 OK: Go to next step
CHECK CRANKSHAFT POSITION SENSOR Disconnect the crankshaft position sensor connector. Check for oil on the connector terminals. OK No oil on the terminals. NG --> See step 122 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B15-1 - B1-110 (NE+) Always Below 1 ohms B15-2 - B1-111 (NE-) Always Below 1 ohms B15-1 or B1-110 (NE+) - Body ground Always 10 kohms or higher B15-2 or B1-111 (NE-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . RESULT Freeze Frame Data Item Suspected Area Proceed to Coolant Temp, Ambient Temperature, Intake Air Coolant Temp, Ambient Temperature Fuel Pump/Speed Status Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more*1 Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temperature by 15°C (27°F) or more - Engine coolant temperature sensor A Other than above All 5 sets of freeze frame data are ON - B At least 1 of the 5 sets of freeze frame data is OFF Fuel pump control system C Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F)*2 - At least 1 of the 5 sets of freeze frame data is OFF Fuel pump control system C All 5 sets of freeze frame data are ON - B HINT: *1: A long time had not elapsed after stopping the engine. *2: A long time had elapsed after stopping the engine. B --> See step 11 C --> See step 124 A --> See step 125
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Disconnect the fuel suction with pump and gauge tube connector. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition g2-4 (B) - Body ground Active Test is being performed 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Suction with Pump and Gauge Tube Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> See step 124 OK: Go to next step
CHECK TERMINAL VOLTAGE (FUEL INJECTOR ASSEMBLY POWER SOURCE) Disconnect the fuel injector assembly connectors. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B7-1 - Body ground Ignition switch ON 11 to 14 V B8-1 - Body ground Ignition switch ON 11 to 14 V B9-1 - Body ground Ignition switch ON 11 to 14 V B10-1 - Body ground Ignition switch ON 11 to 14 V B11-1 - Body ground Ignition switch ON 11 to 14 V B12-1 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.) NG --> See step 126 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for fuel leakage from the fuel pipes. RESULT Result Proceed to Fuel leakage or signs of fuel leakage are present A No fuel leakage or signs of fuel leakage B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected. B --> See step 14 A --> REPAIR OR REPLACE FUEL LINE
CHECK FUEL SYSTEM Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck. RESULT Result Proceed to There is foreign matter or signs that fuel pump was stuck A There is no foreign matter and no signs that fuel pump was stuck B B --> See step 24 A --> REPAIR OR REPLACE FUEL SYSTEM
READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . RESULT Freeze Frame Data Item Suspected Area Proceed to Coolant Temp, Ambient Temperature, Intake Air Coolant Temp, Ambient Temperature Long FT #1 Engine Speed Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temperature by 15°C (27°F) or more - - Engine coolant temperature sensor A Other than above -15% or less, or +15% or more - Fuel pump control system Fuel injector assembly B -15 to +15% Minimum speed is 300 RPM or more*1 Engine assembly C Minimum speed is below 300 RPM Fuel system Intake air system D Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F) - -15% or less, or +15% or more - Fuel pump control system Fuel injector assembly B -15 to +15% Minimum speed is 300 RPM or more*1 Engine assembly C Minimum speed is below 300 RPM Fuel system Intake air system D HINT: *1: Compression loss may have occurred in the engine assembly. B --> See step 16 C --> CHECK AND REPAIR ENGINE ASSEMBLY D --> See step 18 A --> See step 125
INSPECT FUEL INJECTOR ASSEMBLY Check that no carbon is stuck to the fuel injector assembly. OK No carbon present. NG --> See step 127 OK: Go to next step
CHECK FUEL SYSTEM Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck. RESULT Result Proceed to There is foreign matter or signs that fuel pump was stuck A There is no foreign matter and no signs that fuel pump was stuck B B --> See step 24 A --> REPAIR OR REPLACE FUEL SYSTEM
READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . RESULT Freeze Frame Data Item Result Suspected Area Proceed to Coolant Temp Engine coolant temperature is 40°C (104°F) or less*1 Fuel suction with pump and gauge tube assembly (pressure regulator) A Engine coolant temperature is 40 to 90°C (104 to 194°F)*2 Fuel injector assembly B Engine coolant temperature is 90°C (194°F) or more*3 Fuel suction with pump and gauge tube assembly (pressure regulator) A HINT: *1: If the engine coolant temperature is 40°C (104°F) or less (after stopping the engine and the vehicle is not driven for a long period of time), the pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. *2: If the engine coolant temperature is 40 to 90°C (104 to 194°F) (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from a fuel injector assembly. *3: If the engine coolant temperature is 90°C (194°F) or more (2 to 5 minutes have passed after stopping the engine), there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. B --> See step 20 A: Go to next step
CHECK FUEL PRESSURE HINT: For the fuel pressure inspection, refer to the following procedures. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . Attach a fuel pressure gauge and check the fuel pressure after stopping the engine. Standard 147 kPa (1.5 kgf/cm 2 ) or higher (5 minutes after stopping the engine) HINT: If the engine cannot be started, read the values after cranking the engine. RESULT Result Proceed to NG A OK B B --> See step 24 A --> See step 128
CHECK FUEL INJECTOR ASSEMBLY Clean the inside of the surge tank with compressed air. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes. RESULT Result Proceed to 400 ppm or higher A Less than 400 ppm B HINT: If the concentration is 400 ppm or higher, a fuel injector assembly may have a sealing problem. B --> See step 22 A: Go to next step
INSPECT FUEL INJECTOR ASSEMBLY Inspect the fuel injector assembly. Refer to «INSPECTION»(ref-494150-S37087392142012081000000) . NG --> See step 127 OK: Go to next step
CHECK THROTTLE WITH MOTOR BODY ASSEMBLY Check if carbon is in the air flow passage. RESULT Result Proceed to Carbon in passage A No carbon present B B --> See step 23 A --> See step 129
CHECK INTAKE SYSTEM Check the intake system for vacuum leak. Refer to «ON-VEHICLE INSPECTION»(ref-494151-S05436073992012081000000) . OK No leak in intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
PERFORM SIMULATION TEST Check if the engine can be started. RESULT Result Proceed to Engine can be started A Engine cannot be started B B --> See step 25 A --> END
CONFIRM PROBLEM SYMPTOM Confirm the problem symptoms. HINT: The problem symptoms below can be determined by reading the freeze frame data. RESULT Problem Symptom Suspected Area Proceed to The engine does not crank Battery fully depleted Starter assembly (includes pinion gear wear or teeth damage) Starter system Engine assembly (excess friction) Drive plate wear or teeth damage A Abnormal cranking speed Battery fully depleted Starter Engine assembly (excess friction, compression loss) B There is no initial combustion (combustion does not occur even once)*1 Pressure regulator fuel pressure maintenance Fuel injector assembly leak Fuel leak from fuel line Fuel pump control system Fuel suction with pump and gauge tube assembly Spark plug Crankshaft position sensor system Ignition coil system C The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2 Intake system connections Throttle with motor body assembly Camshaft timing oil control valve assembly (for intake side of bank 1, 2) Camshaft timing oil control valve assembly (for exhaust side of bank 1, 2) Mass air flow meter D The initial combustion and starter turnoff occur late*3 Engine coolant temperature sensor Mass air flow meter Air fuel ratio sensor Fuel injector assembly Spark plug Fuel suction with pump and gauge tube assembly Fuel pump control system E HINT: If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning. *1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning. *2: If the engine stalls after starter turnoff, the air fuel ratio may be incorrect or the camshaft timing oil control valve may have a problem returning. *3: If the initial combustion and starter turnoff occur late, the fuel injection volume may be incorrect (too low or too high). B --> See step 32 C --> See step 35 D --> See step 51 E --> See step 58 A: Go to next step
PERFORM SIMULATION TEST When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely. RESULT Problem Symptom Suspected Area Proceed to A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely.*1 Battery Excess engine friction Starter A A noise indicating that the starter pinion gear is extending is heard but the starter pinion gear is spinning freely. Drive plate Starter B A noise indicating that the starter pinion gear is extending is not heard Battery Starter assembly Starter system C HINT: *1: The battery may be fully depleted or there may be excess engine friction. B --> See step 29 C --> See step 30 A: Go to next step
INSPECT BATTERY Inspect the battery. Refer to «ON-VEHICLE INSPECTION»(ref-494113-S34502333932012081000000) . NG --> CHARGE OR REPLACE BATTERY OK: Go to next step
CHECK ENGINE ASSEMBLY Check that the crankshaft rotates smoothly when rotating it by hand. OK Crankshaft rotates smoothly. HINT: Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts. NG --> REPAIR OR REPLACE ENGINE ASSEMBLY OK --> See step 130
CHECK STARTER ASSEMBLY Remove the starter. Refer to «REMOVAL»(ref-494148-S04700750502012081000000) . Check for starter pinion gear wear and damage. Standard There is no wear or damage. NG --> See step 131 OK --> See step 132
INSPECT BATTERY Inspect the battery. Refer to «ON-VEHICLE INSPECTION»(ref-494113-S34502333932012081000000) . NG --> CHARGE OR REPLACE BATTERY OK: Go to next step
INSPECT STARTER Inspect the starter. Refer to «INSPECTION»(ref-494148-S30725378612012081000000) . RESULT Result Proceed to NG A OK (w/o Smart Key System) B OK (w/ Smart Key System) C B --> See step 119 C --> See step 120 A --> See step 131
PERFORM SIMULATION TEST Check the cranking speed. RESULT Problem Symptom Suspected Area Proceed to Cranking speed is slow (100 RPM or less) Battery Starter assembly Excess engine friction A Cranking speed is fast (300 RPM or more)*1 Engine compression loss B HINT: *1: If the cranking speed is fast, there may be compression loss. B --> CHECK AND REPAIR ENGINE ASSEMBLY A: Go to next step
INSPECT BATTERY Inspect the battery. Refer to «ON-VEHICLE INSPECTION»(ref-494113-S34502333932012081000000) . NG --> CHARGE OR REPLACE BATTERY OK: Go to next step
CHECK ENGINE ASSEMBLY Check that the crankshaft rotates smoothly when rotating it by hand. OK Crankshaft rotates smoothly. HINT: Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts. NG --> REPAIR OR REPLACE ENGINE ASSEMBLY OK --> See step 131
CHECK FUEL INJECTOR ASSEMBLY Using a sound scope or screwdriver, check for an injector operating noise while cranking the engine. OK Fuel injector assembly operating noise is heard. NG --> See step 48 OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . NG --> See step 46 OK: Go to next step
INSPECT SPARK PLUG AND SPARK Inspect for sparks. Refer to «ON-VEHICLE INSPECTION»(ref-494111-S17146005232012081000000) . NG --> See step 41 OK: Go to next step
CONFIRM VEHICLE CONDITION Confirm the conditions present when the malfunction occurred based on the customer problem analysis. RESULT Problem Symptom Suspected Area Proceed to When the engine is stopped and a long time has passed, engine starting trouble occurs*1 Pressure regulator is stuck open A When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2 Fuel injector assembly leak B When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3 Failure to maintain fuel pressure by pressure regulator A Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs - C*4 HINT: *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. *2: Fuel may be leaking from a fuel injector assembly. *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. *4: From step 72, perform fuel system troubleshooting C (steps 73 to 77). B --> See step 40 C --> See step 72 A: Go to next step
CHECK FUEL PRESSURE HINT: For the fuel pressure inspection, refer to the following procedures. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . Attach a fuel pressure gauge and check the fuel pressure after stopping the engine. RESULT Result Proceed to Less than 147 kPa (1.5 kgf/cm 2 ) (5 minutes after stopping the engine) A 147 kPa (1.5 kgf/cm 2 ) or higher (5 minutes after stopping the engine) B*1 HINT: If the engine cannot be started, check the fuel pressure after cranking the engine. *1: From step 72, perform fuel system troubleshooting C (steps 73 to 77). B --> See step 72 A --> See step 128
CHECK FUEL INJECTOR ASSEMBLY After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes. RESULT Result Proceed to 400 ppm or higher A Less than 400 ppm B*1 HINT: If the concentration is 400 ppm or higher, a fuel injector assembly may have a sealing problem. *1: From step 72, perform fuel system troubleshooting C (steps 73 to 77). B --> See step 72 A --> See step 127
INSPECT SPARK PLUG Inspect the spark plugs. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494111-S41815547552012081000000) . HINT: Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders. NG --> See step 133 OK: Go to next step
READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Engine Speed. Start the engine. While running the engine, read the [Engine Speed] value. OK A value that matches the actual engine speed is constantly output. HINT: Check the engine speed using a line graph. If the engine cannot be started, check the engine speed while cranking the engine. If the engine speed is 0 RPM, the crankshaft position sensor may have an open or short circuit. NG --> See step 134 OK: Go to next step
CHECK TERMINAL VOLTAGE (IGNITION COIL ASSEMBLY POWER SOURCE) Disconnect the ignition coil assembly connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B23-1 (+B) - B23-4 (GND) Ignition switch ON 11 to 14 V B24-1 (+B) - B24-4 (GND) Ignition switch ON 11 to 14 V B25-1 (+B) - B25-4 (GND) Ignition switch ON 11 to 14 V B26-1 (+B) - B26-4 (GND) Ignition switch ON 11 to 14 V B27-1 (+B) - B27-4 (GND) Ignition switch ON 11 to 14 V B28-1 (+B) - B28-4 (GND) Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Ignition Coil Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.) NG --> See step 126 OK: Go to next step
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) Disconnect the ignition coil assembly connectors. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B23-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B24-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B25-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B26-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B27-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B28-2 (IGF) - B1-104 (IGF1) Always Below 1 ohms B23-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher B24-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher B25-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher B26-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher B27-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher B28-2 (IGF) or B1-104 (IGF1) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) Disconnect the ignition coil assembly connectors. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B23-3 (IGT1) - B1-40 (IGT1) Always Below 1 ohms B24-3 (IGT2) - B1-39 (IGT2) Always Below 1 ohms B25-3 (IGT3) - B1-38 (IGT3) Always Below 1 ohms B26-3 (IGT4) - B1-37 (IGT4) Always Below 1 ohms B27-3 (IGT5) - B1-36 (IGT5) Always Below 1 ohms B28-3 (IGT6) - B1-35 (IGT6) Always Below 1 ohms B23-3 (IGT1) or B1-40 (IGT1) - Body ground Always 10 kohms or higher B24-3 (IGT2) or B1-39 (IGT2) - Body ground Always 10 kohms or higher B25-3 (IGT3) or B1-38 (IGT3) - Body ground Always 10 kohms or higher B26-3 (IGT4) or B1-37 (IGT4) - Body ground Always 10 kohms or higher B27-3 (IGT5) or B1-36 (IGT5) - Body ground Always 10 kohms or higher B28-3 (IGT6) or B1-35 (IGT6) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. If the wire harness is normal, after replacing the ignition coil assembly, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform troubleshooting for the ignition system (steps 78 to 84). NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 135
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for an operating sound from the fuel pump. OK Control the Fuel Pump/Speed Specified Condition ON Operating sound heard OFF Operating sound not heard HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. NG --> See step 124 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for fuel leakage from the fuel pipes. RESULT Result Proceed to Fuel leakage or signs of fuel leakage are present A No fuel leakage or signs of fuel leakage B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected. If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform fuel system troubleshooting (steps 73 to 77). B --> See step 124 A --> REPAIR OR REPLACE FUEL LINE
READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Engine Speed. Start the engine. While running the engine, read the [Engine Speed] value. OK A value that matches the actual engine speed is constantly output. HINT: Check the engine speed using a line graph. If the engine cannot be started, check the engine speed while cranking the engine. If the engine speed is 0 RPM, the crankshaft position sensor may have an open or short circuit. NG --> See step 122 OK: Go to next step
CHECK TERMINAL VOLTAGE (FUEL INJECTOR ASSEMBLY POWER SOURCE) Disconnect the fuel injector assembly connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B7-2 - Body ground Ignition switch ON 11 to 14 V B8-2 - Body ground Ignition switch ON 11 to 14 V B9-2 - Body ground Ignition switch ON 11 to 14 V B10-2 - Body ground Ignition switch ON 11 to 14 V B11-2 - Body ground Ignition switch ON 11 to 14 V B12-2 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.) NG --> See step 126 OK: Go to next step
CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM) Disconnect the fuel injector 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 B7-1 - B1-86 (#10) Always Below 1 ohms B8-1 - B1-109 (#20) Always Below 1 ohms B9-1 - B1-85 (#30) Always Below 1 ohms B10-1 - B1-108 (#40) Always Below 1 ohms B11-1 - B1-84 (#50) Always Below 1 ohms B12-1 - B1-107 (#60) Always Below 1 ohms B7-1 or B1-86 (#10) - Body ground Always 10 kohms or higher B8-1 or B1-109 (#20) - Body ground Always 10 kohms or higher B9-1 or B1-85 (#30) - Body ground Always 10 kohms or higher B10-1 or B1-108 (#40) - Body ground Always 10 kohms or higher B11-1 or B1-84 (#50) - Body ground Always 10 kohms or higher B12-1 - B1-107 (#60) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 123
INSPECT MASS AIR FLOW METER Inspect the mass air flow meter. Refer to «PROCEDURE - Step 6»(ref-494147-S41127203492012081000000) . NG --> See step 57 OK: Go to next step
CHECK INTAKE SYSTEM Check for air leaks in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.]. Refer to «ON-VEHICLE INSPECTION»(ref-494151-S05436073992012081000000) . HINT: If the accelerator pedal is released after revving the engine, the inspection is easier to perform because the vacuum inside the intake manifold increases and the air suction noise becomes louder. If Short FT and Long FT #1 are largely different from the normal values (differ by more than 15%) when idling (intake air volume is small) and almost the same as the normal values when revving the engine (for example, when maintaining a speed of 3000 RPM) (intake air volume is high), air leakage may be present. OK There is no air leakage. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
CHECK THROTTLE WITH MOTOR BODY ASSEMBLY Disconnect the throttle with motor body assembly connector. HINT: When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 4 to 7°. Crank the engine and check that it starts. RESULT Result Proceed to Engine starts A Engine does not start B HINT: When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . B --> See step 55 A: Go to next step
CHECK THROTTLE WITH MOTOR BODY ASSEMBLY Check if carbon is in the air flow passage. OK No carbon present. NG --> REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR) Performing the Active Test, referring to DTC P0011 inspection procedure. Refer to «PROCEDURE - Step 2»(ref-494147-S14271662752012081000000) . HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems. NG --> See step 136 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR) Performing the Active Test, referring to DTC P0014 inspection procedure. Refer to «PROCEDURE - Step 2»(ref-494147-S30504785832012081000000) . RESULT Result Proceed to NG A OK B*1 HINT: *1: From step 72, perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95). Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems. B --> See step 72 A --> See step 137
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B4-5 (VG) - B1-74 (VG) Always Below 1 ohms B4-4 (E2G) - B1-75 (E2G) Always Below 1 ohms B4-5 (VG) or B1-74 (VG) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. If the wire harness is normal, after replacing the mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95). NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 138
INSPECT ENGINE COOLANT TEMPERATURE SENSOR Inspect the engine coolant temperature sensor. Refer to «INSPECTION»(ref-493957-S01077076382012081000000) . HINT: If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. NG --> See step 125 OK: Go to next step
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 B5-2 - B1-76 (THW) Always Below 1 ohms B5-1 - B1-97 (ETHW) Always Below 1 ohms B5-2 or B1-76 (THW) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect the mass air flow meter. Refer to «INSPECTION»(ref-493957-S00464188112012081000000) . HINT: If the mass air flow meter is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. NG --> See step 138 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the mass air flow meter connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B4-5 (VG) - B1-74 (VG) Always Below 1 ohms B4-4 (E2G) - B1-75 (E2G) Always Below 1 ohms B4-5 (VG) or B1-74 (VG) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. If the wire harness is normal, after replacing the mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 72 and perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95). NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
READ VALUE USING TECHSTREAM (LONG FT #1, FT #2 - ATMOSPHERE PRESSURE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Long FT #1/Long FT #2 and Atmosphere Pressure. RESULT Data List Item Result Suspected Area Proceed to Long FT #1 Long FT #2 +25% or more or less than -25% Air fuel ratio sensor Mass air flow meter Fuel injector assembly ECM A Atmosphere Pressure 80 kPa or less (when altitude is 0 m) Both Data List items listed above Values are other than above - B B --> See step 66 A: Go to next step
PERFORM SIMULATION TEST Remove the EFI NO. 1 and ETCS fuses from the engine room relay block. After 60 seconds or more elapse, install the EFI NO. 1 and ETCS fuses. Check if the engine can be started. RESULT Result Proceed to Engine can be started A Engine cannot be started B B --> See step 66 A: Go to next step
INSPECT AIR FUEL RATIO SENSOR Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Fuel System Status #1 and Fuel System Status #2. Confirm that Fuel System Status #1 and Fuel System Status #2 are both CL. Enter the following menus: Powertrain / Engine / Data List / AF Lambda B1S1. Confirm that AF Lambda B1S1 are both within the range of 0.95 to 1.05 when idling. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume. TEXT IN ILLUSTRATION *a Injection Volume *b Air Fuel Ratio Sensor Output Voltage *c Heated Oxygen Sensor Output Voltage Standard Techstream Display Injection Volume Specified Condition AFS Voltage B1S1 AFS Voltage B2S1 +12% Air fuel ratio sensor output voltage is below 3.1 V -12% Air fuel ratio sensor output voltage is higher than 3.4 V HINT: 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 air fuel ratio sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. NG --> See step 139 OK: Go to next step
PERFORM SIMULATION TEST Check if the idling speed is stable after starting the engine. OK Speed is stable. HINT: After replacing the fuel injector assembly or mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. NG --> See step 127 OK --> See step 138
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . NG --> See step 71 OK: Go to next step
INSPECT SPARK PLUG Inspect the spark plugs. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494111-S41815547552012081000000) . RESULT Result Proceed to All cylinders are normal A One cylinder is abnormal*1 B All cylinders are abnormal*2, *3 C HINT: *1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. *2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. *3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly. B --> See step 140 C --> See step 141 A: Go to next step
CONFIRM VEHICLE CONDITION Confirm the conditions present when the malfunction occurred based on the customer problem analysis. RESULT Problem Symptom Suspected Area Proceed to When the engine is stopped and a long time has passed, engine starting trouble occurs*1 Pressure regulator is stuck open A When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2 Fuel injector assembly leaks B When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3 Failure to maintain fuel pressure by pressure regulator A Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs - C*4 HINT: *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. *2: Fuel may be leaking from a fuel injector assembly. *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine. *4: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. B --> See step 70 C --> See step 72 A: Go to next step
CHECK FUEL PRESSURE HINT: For the fuel pressure inspection, refer to the following procedures. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . Attach a fuel pressure gauge and check the fuel pressure after stopping the engine. RESULT Result Proceed to Less than 147 kPa (1.5 kgf/cm 2 ) (5 minutes after stopping the engine) A 147 kPa (1.5 kgf/cm 2 ) or higher (5 minutes after stopping the engine) B*1 HINT: If the engine cannot be started, check the fuel pressure after cranking the engine. *1: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. B --> See step 72 A --> See step 128
CHECK FUEL INJECTOR ASSEMBLY Clean the inside of the surge tank with compressed air. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes. RESULT Result Proceed to 400 ppm or higher A Less than 400 ppm B*1 HINT: If the concentration is 400 ppm or higher, a fuel injector assembly may have a sealing problem. *1: From step 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. B --> See step 72 A --> See step 127
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for fuel leakage from the fuel pipes. RESULT Result Proceed to Fuel leakage or signs of fuel leakage are present A No fuel leakage or signs of fuel leakage B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected. If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 72 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 116), in that order. B --> See step 124 A --> REPAIR OR REPLACE FUEL LINE
CHECK MALFUNCTION CONDITION If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 47, perform fuel system troubleshooting C (steps 73 to 77). RESULT Performed Step Troubleshooting by System Procedure Proceed to Steps 38, 39, 40 and 47 Fuel system troubleshooting C 73 to 77 A If the malfunction could not be identified during the inspection in step 45, perform ignition system troubleshooting (steps 78 to 84). RESULT Performed Step Troubleshooting by System Procedure Proceed to Step 45 Ignition system troubleshooting 78 to 84 B If the malfunction could not be identified during the inspection in steps 55, 56 and 57, perform intake air system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 94). RESULT Performed Step Troubleshooting by System Procedure Proceed to Step 55, 56, 57 Intake air system troubleshooting 85 to 87 C Fuel system troubleshooting A 88 to 94 If the malfunction could not be identified during the inspection in steps 58, 59, 60, 61, 64, 65, 66, 67, 68, 69, 70 and 71, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake air system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 115), in that order. RESULT Performed Step Troubleshooting by System Procedure Proceed to Steps 58, 59, 60, 61, 64, 65, 66, 67, 68, 69, 70 and 71 Fuel system troubleshooting A 95 to 102 D Fuel system troubleshooting B 103 to 105 Intake air system troubleshooting 106 to 108 Ignition system troubleshooting 109 to 115 B --> See step 78 C --> See step 85 D --> See step 95 A: Go to next step
INSPECT FUEL INJECTOR ASSEMBLY Inspect the fuel injector assembly. Refer to «INSPECTION»(ref-494150-S37087392142012081000000) . NG --> See step 127 OK: Go to next step
CHECK TERMINAL VOLTAGE (FUEL INJECTOR ASSEMBLY POWER SOURCE) Disconnect the fuel injector assembly connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B7-2 - Body ground Ignition switch ON 11 to 14 V B8-2 - Body ground Ignition switch ON 11 to 14 V B9-2 - Body ground Ignition switch ON 11 to 14 V B10-2 - Body ground Ignition switch ON 11 to 14 V B11-2 - Body ground Ignition switch ON 11 to 14 V B12-2 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.) NG --> See step 126 OK: Go to next step
CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM) Disconnect the fuel injector 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 B7-1 - B1-86 (#10) Always Below 1 ohms B8-1 - B1-109 (#20) Always Below 1 ohms B9-1 - B1-85 (#30) Always Below 1 ohms B10-1 - B1-108 (#40) Always Below 1 ohms B11-1 - B1-84 (#50) Always Below 1 ohms B12-1 - B1-107 (#60) Always Below 1 ohms B7-1 or B1-86 (#10) - Body ground Always 10 kohms or higher B8-1 or B1-109 (#20) - Body ground Always 10 kohms or higher B9-1 or B1-85 (#30) - Body ground Always 10 kohms or higher B10-1 or B1-108 (#40) - Body ground Always 10 kohms or higher B11-1 or B1-84 (#50) - Body ground Always 10 kohms or higher B12-1 - B1-107 (#60) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 77 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
INSPECT VVT SENSOR Replace the VVT sensor. Refer to «REMOVAL»(ref-493957-S09204104542012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (VVT SENSOR IS DEFECTIVE)
CHECK CRANKSHAFT POSITION SENSOR Check the tightening and installation condition of the crankshaft position sensor bolt. Check the connection of the crankshaft position sensor connector. OK Sensor is installed correctly. NG --> See step 121 OK: Go to next step
CHECK VVT SENSOR Check the tightening and installation condition of the VVT sensor bolt. Check the connection of the VVT sensor connector. OK Sensor is installed correctly. NG --> See step 142 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B15-1 - B1-110 (NE+) Always Below 1 ohms B15-2 - B1-111 (NE-) Always Below 1 ohms B15-1 or B1-110 (NE+) - Body ground Always 10 kohms or higher B15-2 or B1-111 (NE-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE SIDE) - ECM) Disconnect the VVT sensor (for intake side) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B16-1 (VVR+) - B1-90 (VV1+) Always Below 1 ohms B16-2 (VVR-) - B1-89 (VV1-) Always Below 1 ohms B16-3 (VC) - B1-67 (VCV1) Always Below 1 ohms B17-1 (VVL+) - B1-87 (VV2+) Always Below 1 ohms B17-2 (VVL-) - B1-88 (VV2-) Always Below 1 ohms B17-3 (VC) - B1-66 (VCV2) Always Below 1 ohms B16-1 (VVR+) or B1-90 (VV1+) - Body ground Always 10 kohms or higher B16-2 (VVR-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B16-3 (VC) or B1-67 (VCV1) - Body ground Always 10 kohms or higher B17-1 (VVL+) or B1-87 (VV2+) - Body ground Always 10 kohms or higher B17-2 (VVL-) or B1-88 (VV2-) - Body ground Always 10 kohms or higher B17-3 (VC) or B1-66 (VCV2) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST SIDE) - ECM) Disconnect the VVT sensor (for exhaust side) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B36-1 (EX+) - B1-69 (EV1+) Always Below 1 ohms B36-2 (EX-) - B1-89 (VV1-) Always Below 1 ohms B36-3 (VC2) - B1-67 (VCV1) Always Below 1 ohms B37-1 (EX+) - B1-64 (EV2+) Always Below 1 ohms B37-2 (EX-) - B1-89 (VV1-) Always Below 1 ohms B37-3 (VC2) - B1-67 (VCV1) Always Below 1 ohms B36-1 (EX+) or B1-69 (EV1+) - Body ground Always 10 kohms or higher B36-2 (EX-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B36-3 (VC2) or B1-67 (VCV1) - Body ground Always 10 kohms or higher B37-1 (EX+) or B1-64 (EV2+) - Body ground Always 10 kohms or higher B37-2 (EX-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B37-3 (VC2) or B1-67 (VCV1) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 84 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
INSPECT VVT SENSOR Replace the VVT sensor. Refer to «REMOVAL»(ref-493957-S09204104542012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (VVT SENSOR IS DEFECTIVE)
READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value. Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches should be off RESULT Data List Item Result Suspected Area Proceed to ISC Learning Value (engine displacement (liters) x 0.9) or more Valve timing Compression A Less than (engine displacement (liters) x 0.9) - B B --> See step 87 A: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Check the compression. Refer to «ON-VEHICLE INSPECTION - Step 11»(ref-494105-S24148061602012081000000) . NG --> REPAIR OR REPLACE ENGINE ASSEMBLY OK --> See step 143
INSPECT ENGINE COOLANT TEMPERATURE SENSOR Inspect the engine coolant temperature sensor. Refer to «INSPECTION»(ref-493957-S01077076382012081000000) . NG --> See step 125 OK: Go to next step
CHECK FUEL PRESSURE HINT: For the fuel pressure inspection, refer to the following procedures. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine. RESULT Vehicle State Specified Condition Cranking engine 304 to 343 kPa (3.1 to 3.5 kgf/cm 2 ) 5 minutes after stopping engine 147 kPa (1.5 kgf/cm 2 ) or more NG --> See step 94 OK: Go to next step
READ VALUE USING TECHSTREAM (LONG FT #1, FT #2) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Long FT #1 and Long FT #2. RESULT Data List Item Result Suspected Area Proceed to Long FT #1 Long FT #2 -15 to +15% Wire harness or connector Fuel A +15% or more, or less than -15% Fuel injector assembly B B --> See step 127 A: Go to next step
PERFORM SIMULATION TEST Check if the idling speed after starting the engine is currently stable and has always been stable in the past. RESULT Problem Symptom Suspected Area Proceed to Current unstable idling speed or history of unstable idling speed Crankshaft position sensor system A All current and past idling speeds are stable Fuel B HINT: Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle. B --> REPLACE FUEL A: Go to next step
CHECK CRANKSHAFT POSITION SENSOR Check the tightening and installation condition of the crankshaft position sensor bolt. Check the connection of the crankshaft position sensor connector. OK Sensor is installed correctly. NG --> See step 121 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B15-1 - B1-110 (NE+) Always Below 1 ohms B15-2 - B1-111 (NE-) Always Below 1 ohms B15-1 or B1-110 (NE+) - Body ground Always 10 kohms or higher B15-2 or B1-111 (NE-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for fuel leakage from the fuel pipes. RESULT Result Proceed to No fuel leakage or signs of fuel leakage A Fuel leakage or signs of fuel leakage are present B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected. B --> REPAIR OR REPLACE FUEL LINE A --> END (FUEL SUCTION WITH PUMP AND GAUGE TUBE IS DEFECTIVE)
CHECK FUEL PRESSURE HINT: For the fuel pressure inspection, refer to the following procedures. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-494145-S27121823292012081000000) . Attach a fuel pressure gauge and check the fuel pressure after stopping the engine. RESULT Result Proceed to 147 kPa (1.5 kgf/cm 2 ) or higher (5 minutes after stopping the engine) A Less than 147 kPa (1.5 kgf/cm 2 ) (5 minutes after stopping the engine) B B --> See step 101 A: Go to next step
READ VALUE USING TECHSTREAM (LONG FT #1, FT #2) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Long FT #1 and Long FT #2. RESULT Data List Item Result Suspected Area Proceed to Long FT #1 Long FT #2 -15 to +15% Wire harness or connector Fuel A +15% or more, or less than -15% Fuel injector assembly B B --> See step 127 A: Go to next step
PERFORM SIMULATION TEST Check if the idling speed after starting the engine is currently stable and has always been stable in the past. RESULT Problem Symptom Suspected Area Proceed to Current unstable idling speed or history of unstable idling speed Crankshaft position sensor system A All current and past idling speeds are stable Fuel B HINT: Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle. B --> REPLACE FUEL A: Go to next step
CHECK CRANKSHAFT POSITION SENSOR Check the tightening and installation condition of the crankshaft position sensor bolt. Check the connection of the crankshaft position sensor connector. OK Sensor is installed correctly. NG --> See step 121 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B15-1 - B1-110 (NE+) Always Below 1 ohms B15-2 - B1-111 (NE-) Always Below 1 ohms B15-1 or B1-110 (NE+) - Body ground Always 10 kohms or higher B15-2 or B1-111 (NE-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed. When performing the Active Test, check for fuel leakage from the fuel pipes. RESULT Result Proceed to Fuel leakage or signs of fuel leakage are present A No fuel leakage or signs of fuel leakage B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected. B --> See step 102 A --> REPAIR OR REPLACE FUEL LINE
INSPECT FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY Disconnect the fuel suction with pump and gauge tube assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 4 (B) - 5 (E) 20°C (68°F) 0.2 to 3.0 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Fuel Suction with Pump and Gauge Tube Assembly) HINT: Make sure there is no foreign matter such as iron particles on the fuel suction with pump and gauge tube assembly and no signs that the fuel suction with pump and gauge tube assembly was stuck. Make sure the internal connector is securely connected. Make sure the fuel pump filter is not clogged. NG --> See step 144 OK: Go to next step
INSPECT PURGE VSV Disconnect the vacuum hose (on the canister side) of the purge VSV. Start the engine. Idle the engine. Disconnect the connector of the purge VSV. Check if air flows through the purge VSV. OK Air does not flow HINT: When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . NG --> See step 145 OK: Go to next step
CHECK FUEL INJECTOR ASSEMBLY Clean the inside of the surge tank with compressed air. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes. RESULT Result Proceed to 400 ppm or higher A Less than 400 ppm B HINT: If the concentration is 400 ppm or higher, a fuel injector assembly may have a sealing problem. B --> See step 105 A --> See step 127
CHECK INTAKE VALVE Check if carbon is on the intake valves. RESULT Result Proceed to Carbon present A No carbon present B B --> See step 106 A --> CLEAN INTAKE VALVE
READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes. RESULT Data List Item Result Suspected Area Proceed to ISC Learning Value (engine displacement (liters) x 0.9) or more Valve timing Compression A Less than (engine displacement (liters) x 0.9) - B B --> See step 108 A: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Check the compression. Refer to «ON-VEHICLE INSPECTION - Step 11»(ref-494105-S24148061602012081000000) . NG --> REPAIR OR REPLACE ENGINE ASSEMBLY OK --> See step 143
INSPECT ENGINE COOLANT TEMPERATURE SENSOR Inspect the engine coolant temperature sensor. Refer to «INSPECTION»(ref-493957-S01077076382012081000000) . NG --> See step 125 OK: Go to next step
CHECK CRANKSHAFT POSITION SENSOR Check the tightening and installation condition of the crankshaft position sensor bolt. Check the connection of the crankshaft position sensor connector. OK Sensor is installed correctly. NG --> See step 121 OK: Go to next step
CHECK VVT SENSOR Check the tightening and installation condition of the VVT sensor bolt. Check the connection of the VVT sensor connector. OK Sensor is installed correctly. NG --> See step 142 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the crankshaft position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B15-1 - B1-110 (NE+) Always Below 1 ohms B15-2 - B1-111 (NE-) Always Below 1 ohms B15-1 or B1-110 (NE+) - Body ground Always 10 kohms or higher B15-2 or B1-111 (NE-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE SIDE) - ECM) Disconnect the VVT sensor (for intake side) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B16-1 (VVR+) - B1-90 (VV1+) Always Below 1 ohms B16-2 (VVR-) - B1-89 (VV1-) Always Below 1 ohms B16-3 (VC) - B1-67 (VCV1) Always Below 1 ohms B17-1 (VVL+) - B1-87 (VV2+) Always Below 1 ohms B17-2 (VVL-) - B1-88 (VV2-) Always Below 1 ohms B17-3 (VC) - B1-66 (VCV2) Always Below 1 ohms B16-1 (VVR+) or B1-90 (VV1+) - Body ground Always 10 kohms or higher B16-2 (VVR-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B16-3 (VC) or B1-67 (VCV1) - Body ground Always 10 kohms or higher B17-1 (VVL+) or B1-87 (VV2+) - Body ground Always 10 kohms or higher B17-2 (VVL-) or B1-88 (VV2-) - Body ground Always 10 kohms or higher B17-3 (VC) or B1-66 (VCV2) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST SIDE) - ECM) Disconnect the VVT sensor (for exhaust side) connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B36-1 (EX+) - B1-69 (EV1+) Always Below 1 ohms B36-2 (EX-) - B1-89 (VV1-) Always Below 1 ohms B36-3 (VC2) - B1-67 (VCV1) Always Below 1 ohms B37-1 (EX+) - B1-64 (EV2+) Always Below 1 ohms B37-2 (EX-) - B1-89 (VV1-) Always Below 1 ohms B37-3 (VC2) - B1-67 (VCV1) Always Below 1 ohms B36-1 (EX+) or B1-69 (EV1+) - Body ground Always 10 kohms or higher B36-2 (EX-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B36-3 (VC2) or B1-67 (VCV1) - Body ground Always 10 kohms or higher B37-1 (EX+) or B1-64 (EV2+) - Body ground Always 10 kohms or higher B37-2 (EX-) or B1-89 (VV1-) - Body ground Always 10 kohms or higher B37-3 (VC2) or B1-67 (VCV1) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR Replace the crankshaft position sensor. Refer to «REMOVAL»(ref-493957-S11232225412012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 115 OK --> END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
INSPECT VVT SENSOR Replace the VVT sensor. Refer to «REMOVAL»(ref-493957-S09204104542012081000000) . Check the engine start operation. OK Malfunction has been repaired successfully. NG --> See step 123 OK --> END (VVT SENSOR IS DEFECTIVE)
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493954-S26400840072012081000000)
REPAIR ENGINE IMMOBILISER SYSTEM (W/O SMART KEY SYSTEM). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493955-S26531163512012081000000)
REPAIR ENGINE IMMOBILISER SYSTEM (W/ SMART KEY SYSTEM). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493965-S40441146682012081000000)
CHECK STARTER SIGNAL CIRCUIT (W/O SMART KEY SYSTEM). Refer to «Starter Signal Circuit»(ref-494144-S06086710212012081000000)
CHECK CRANKING HOLDING FUNCTION CIRCUIT (W/ SMART KEY SYSTEM). Refer to «Cranking Holding Function Circuit»(ref-494144-S16334288552012081000000)
SECURELY REINSTALL CRANKSHAFT POSITION SENSOR. Refer to «INSTALLATION»(ref-493957-S23285246242012081000000)
REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-493957-S11232225412012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)
CHECK FUEL PUMP CONTROL CIRCUIT. Refer to «Fuel Pump Control Circuit»(ref-494144-S04379509852012081000000)
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-493957-S36534567122012081000000)
CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-494144-S01537532962012081000000)
REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-494150-S18741957392012081000000)
REPLACE FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY. Refer to «REMOVAL»(ref-494150-S36058867092012081000000)
CLEAN OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY. Refer to «REMOVAL»(ref-493957-S09457030132012081000000)
INSPECT STARTER. Refer to «INSPECTION»(ref-494148-S30725378612012081000000)
REPLACE STARTER. Refer to «REMOVAL»(ref-494148-S04700750502012081000000)
REPLACE DRIVE PLATE AND RING GEAR. Refer to «REMOVAL»(ref-494105-S22912069352012081000000)
REPLACE SPARK PLUG. Refer to «REMOVAL»(ref-493957-S35214455032012081000000)
CHECK CRANKSHAFT POSITION SENSOR CIRCUIT. Refer to «DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent»(ref-494147-S02434166402012081000000)
REPLACE IGNITION COIL ASSEMBLY. Refer to «REMOVAL»(ref-493957-S35214455032012081000000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE SIDE). Refer to «REMOVAL»(ref-493957-S17304517712012081000000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE). Refer to «REMOVAL»(ref-493957-S17304517712012081000000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-493957-S12273208142012081000000)
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-493957-S42556714632012081000000)
REPLACE SPARK PLUG (ABNORMAL CYLINDER). Refer to «REMOVAL»(ref-493957-S35214455032012081000000)
REPLACE SPARK PLUG (ALL CYLINDER). Refer to «REMOVAL»(ref-493957-S35214455032012081000000)
SECURELY REINSTALL VVT SENSOR. Refer to «INSTALLATION»(ref-493957-S28072647462012081000000)
CHECK VALVE TIMING. Refer to «PROCEDURE - Step 5»(ref-494147-S14271662752012081000000)
REPLACE FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY. Refer to «REMOVAL»(ref-494150-S36058867092012081000000)
INSPECT PURGE VSV. Refer to «INSPECTION»(ref-494115-S10886274872012081000000)

Note. After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Refer to PRECAUTION .

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.
The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.

HINT

Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

Since a pending DTC is not stored for this DTC, it takes time to confirm whether the malfunction has been successfully repaired by checking for this DTC. When confirming whether the malfunction has been successfully repaired, compare "ISC Learning Value" recorded in the freeze frame data with "ISC Learning Value" in the Data List after repairs have been made to save time.

Scheme 491

Scheme 491: PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P2109) Connect the Techstream to the DLC3. Turn the ignition switch ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P2109 is output A DTC P2109 and other DTCs are output B HINT: If any DTCs other than P2109 are output, troubleshoot those DTCs first. B --> See step 5 A: Go to next step
CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Using the Techstream, check "ISC Learning Value" in the freeze frame data. Refer to «FREEZE FRAME DATA»(ref-493954-S29691837082012081000000) . HINT: Be sure to confirm "ISC Learning Value" in the freeze frame data as it is used when confirming whether the malfunction has been successfully repaired. NEXT: Go to next step
REMOVE FOREIGN OBJECT (CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY) Clean off any deposits from the inside of the throttle with motor body assembly. TEXT IN ILLUSTRATION *1 Bore *2 Valve *a Reference *b Throttle Body Cross-section Diagram *c When valve fully opened *d Deposits *e Do not directly apply cleaner Push open the throttle valve and wipe off any carbon from the valve and bore using a cloth soaked in non-residue solvent. NOTE: Make sure that the cloth or your fingers do not get caught in the valve. Make sure that foreign matter does not enter the throttle valve. Do not directly apply non-residue solvent to the throttle with motor body assembly or wash the throttle with motor body assembly. Cleaning solvent may leak into the motor from the shaft and cause problems such as rust or valve movement problems. If there is coating material on the edge of the valve, be careful not to remove it. Push the throttle valve open gently with your finger and check that the throttle valve moves smoothly. HINT: If the throttle valve does not open smoothly, replace the throttle with motor body assembly. NEXT: Go to next step
READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) Remove the EFI NO. 1 and ETCS fuses at the same time, wait 60 seconds or more, and then reinstall the fuses to reset the ISC learning value. Connect the Techstream to the DLC3. Start the engine and fully warm it up. HINT: The A/C switch and all accessory switches should be off. Turn the Techstream on. Leave the vehicle idling for 3 minutes or more and check that the engine speed is at the standard idling speed. HINT: Check the freeze frame data and make sure that the vehicle conditions are the same as when the DTC was stored. Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value. Read the value. OK The value is half of "ISC Learning Value" recorded in the freeze frame data or less. NG --> See step 6 OK --> END
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493954-S26400840072012081000000)
REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY. Refer to «REMOVAL»(ref-493957-S09457030132012081000000)

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.
Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(ref-493954-S11583093352012081000000) .

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

HINT

Scheme 492

Scheme 492: PROCEDURE

READ VALUE USING TECHSTREAM (+BM VOLTAGE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / +BM voltage. Read the value displayed on the Techstream. Standard Voltage 11 to 14 V NG --> See step 2 OK --> See step 3
CHECK HARNESS AND CONNECTOR (ECM - BATTERY, BODY GROUND) Disconnect the ECM connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B1-41 (+BM) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B1-82 (ME01) - Body ground Always Below 1 ohms B1-81 (E1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493954-S36145137532012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

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.
Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(ref-493954-S11583093352012081000000) .

HINT

Scheme 493

Scheme 493: PROCEDURE

Scheme 494

READ VALUE USING TECHSTREAM (ACCEL SENSOR OUT NO. 1 AND ACCEL SENSOR OUT NO. 2) Connect the Techstream to the DLC3. TEXT IN ILLUSTRATION *a Depressed *b Released Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Accel Sensor Out No. 1 and Accel Sensor Out No. 2. Read the values displayed on the Techstream. Standard Voltage Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out No. 2 Difference between Accel Sensor Out No. 1 and Accel Sensor Out No. 2 Released 0.5 to 1.1 V 1.2 to 2.0 V More than 0.02 V Depressed 2.6 to 4.5 V 3.4 to 4.8 V NG --> See step 2 OK --> See step 8
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM) Disconnect the accelerator pedal sensor 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 A1-6 (VPA) - A39-55 (VPA) Always Below 1 ohms A1-5 (EPA) - A39-58 (EPA) Always Below 1 ohms A1-4 (VCPA) - A39-57 (VCPA) Always Below 1 ohms A1-3 (VPA2) - A39-56 (VPA2) Always Below 1 ohms A1-2 (EPA2) - A39-60 (EPA2) Always Below 1 ohms A1-1 (VCP2) - A39-59 (VCP2) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A1-6 (VPA) or A39-55 (VPA) - Body ground Always 10 kohms or higher A1-5 (EPA) or A39-58 (EPA) - Body ground Always 10 kohms or higher A1-4 (VCPA) or A39-57 (VCPA) - Body ground Always 10 kohms or higher A1-3 (VPA2) or A39-56 (VPA2) - Body ground Always 10 kohms or higher A1-2 (EPA2) or A39-60 (EPA2) - Body ground Always 10 kohms or higher A1-1 (VCP2) or A39-59 (VCP2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT ECM (VCPA AND VCP2 VOLTAGE) Disconnect the accelerator pedal sensor assembly connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A1-4 (VCPA) - A1-5 (EPA) Ignition switch ON 4.5 to 5.5 V A1-1 (VCP2) - A1-2 (EPA2) Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Accelerator Pedal Sensor Assembly) NG --> See step 6 OK: Go to next step
REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Replace the accelerator pedal sensor assembly. Refer to «REMOVAL»(ref-493957-S02474311212012081000000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL SENSOR ASSEMBLY DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P2120, P2122, P2123, P2125, P2127, P2128 or P2138. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P2120, P2122, P2123, P2125, P2127, P2128 or P2138 is output) B B --> See step 7 A --> END
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493954-S36145137532012081000000)

HINT

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.
Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.

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

HINT

Refer to "Data List / Active Test" [AFS Voltage B1S1 and AFS Voltage B2S1]. Refer to «DATA LIST / ACTIVE TEST»(ref-493954-S11583093352012081000000) .
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.
Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.

DTC SUMMARY

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P2420	Vent valve stuck open (vent)	Following condition met during key-off EVAP monitor: EVAP pressure change when vent valve closed (ON) below 0.3 kPa(gauge) [2.25 mmHg(gauge)]	Canister pump module (reference orifice, vacuum pump, vent valve) Connector/wire harness (Canister pump module - ECM) Canister assembly (filter inside canister clogged) ECM	While ignition switch off	2 trip

HINT

The vent valve is built into the canister pump module.

Refer to EVAP System. Refer to INSPECTION PROCEDURE .

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P2610	Soak timer (built into ECM)	ECM internal malfunction	ECM	Engine running	2 trip

HINT

DTC P2610 is stored if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
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.

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

HINT

Scheme 495

Scheme 495: PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC U0101) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read DTCs. RESULT Result Proceed to DTC U0101 is output A DTC U0101 and other DTCs are output B HINT: If any DTCs other than U0101 are output, troubleshoot those DTCs first. B --> See step 6 A: Go to next step
INSPECT ECU POWER SOURCE CIRCUIT (TCM POWER SOURCE) Disconnect the TCM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B2-1 (BATT) - B2-8 (E1) Always 11 to 14 V B2-18 (+B) - B2-8 (E1) Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to TCM) NG --> GO TO TCM POWER SOURCE CIRCUIT OK: Go to next step
CHECK HARNESS AND CONNECTOR (ECM - TCM) Disconnect the TCM 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 B2-6 (CAN+) - B1-24 (CAN+) Always Below 1 ohms B2-7 (CAN-) - B1-1 (CAN-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B2-6 (CAN+) or B1-24 (CAN+) - Body ground Always 10 kohms or higher B2-7 (CAN-) or B1-1 (CAN-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC U0101) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read DTCs. RESULT Result Proceed to DTC is not output A DTC U0101 is output (for 2WD) B DTC U0101 is output (for AWD) C B --> See step 7 C --> See step 8 A --> END
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493954-S26400840072012081000000)
REPLACE TCM (FOR 2WD). Refer to «REMOVAL»(ref-494119-S34189171122012081000000)
REPLACE TCM (FOR AWD). Refer to «REMOVAL»(ref-494120-S19270184412012081000000)

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

Scheme 496

Scheme 496: PROCEDURE

Scheme 497

Scheme 498

CHECK VACUUM HOSES If the hose is damaged, replace the vacuum hose assembly. Check the air and vacuum hoses for looseness, disconnection and blockage. OK No looseness, disconnection or blockage. TEXT IN ILLUSTRATION *1 Engine *2 Duty Vacuum Switching Valve *3 Front Engine Mounting Insulator Assembly *4 ECM *5 Air Cleaner Filter Element Sub-assembly *6 Vacuum Tank *a to Intake Air Control Valve NG --> REPAIR OR REPLACE VACUUM HOSES OK: Go to next step
CHECK VACUUM Start the engine. Disconnect the vacuum hose from the air cleaner cap. Check that the disconnected port located on the vacuum tank applies suction to your finger. OK Vacuum exists. NG --> CHECK AND REPLACE VACUUM SOURCE AND HOSES OK: Go to next step
INSPECT DUTY VACUUM SWITCHING VALVE (OPERATION) Inspect the duty vacuum switching valve. Refer to «INSPECTION»(ref-493957-S19250592962012081000000) . NG --> See step 8 OK: Go to next step
INSPECT DUTY VACUUM SWITCHING VALVE (RESISTANCE) Inspect the duty vacuum switching valve. Refer to «INSPECTION»(ref-493957-S19250592962012081000000) . NG --> See step 8 OK: Go to next step
INSPECT FRONT ENGINE MOUNTING INSULATOR ASSEMBLY (VACUUM LEAK) Inspect the front engine mounting insulator assembly. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-493957-S39015426262012081000000) . NG --> See step 9 OK: Go to next step
INSPECT DUTY VACUUM SWITCHING VALVE (POWER SOURCE VOLTAGE) Disconnect the duty vacuum switching valve connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B40-1 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Duty Vacuum Switching Valve) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - DUTY VACUUM SWITCHING VALVE) OK: Go to next step
CHECK HARNESS AND CONNECTOR (DUTY VACUUM SWITCHING VALVE - ECM) Disconnect the duty vacuum switching valve 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 B40-2 - B1-83 (ACM) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B40-2 or B1-83 (ACM) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
REPLACE DUTY VACUUM SWITCHING VALVE. Refer to «REMOVAL»(ref-493957-S34330466902012081000000)
REPLACE FRONT ENGINE MOUNTING INSULATOR ASSEMBLY. Refer to «REMOVAL»(ref-493957-S02047883172012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

HINT

Using the Techstream monitor results enables the EVAP (Evaporative Emission) system to be confirmed.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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CONFIRM DTC Turn the ignition switch off and wait for 10 seconds. Turn the ignition switch to ON. Turn the ignition switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Confirm DTCs and freeze frame data. If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below. NOTE: If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored. NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes. HINT: If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal. NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (MANUAL MODE) NOTE: In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the Techstream. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 1/6) Check the EVAP pressure in step 1/6. RESULT DTC *1 Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure Not yet determined A P0451 EVAP pressure fluctuates by +/-0.3 kPa(gauge) [2.25 mmHg(gauge)] or more Canister pressure sensor signal noise B (P0452 or P0453) *2 EVAP pressure is below 42.11 kPa(abs) [315.85 mmHg(abs)] or 123.761 kPa(abs) [928.28 mmHg(abs)] or more EVAP pressure deviates +/-10 kPa [+/-75 mmHg] from actual atmosphere pressure *3 Canister pressure sensor or its circuit has malfunction C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: If the canister pressure sensor circuit has an open or short, DTC P0452 or P0453 is stored 0.5 seconds after the ignition switch is turned to ON. HINT: *3: Canister pressure sensor standard output range is 70 to 110 kPa(abs) [525 to 825 mmHg(abs)]. This varies by weather. B --> See step 38 C --> See step 12 A: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 1/6 TO 2/6) Check the EVAP pressure in steps 1/6 and 2/6. RESULT DTC* Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure during step 1/6. Then decreases to reference pressure Not yet determined A P2402 Small difference between EVAP pressures during steps 1/6 and 2/6 Leak detection pump stuck ON B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. B --> See step 31 A: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 2/6) HINT: Make a note of the pressures checked in inspection items (A) and (B) below. Check the EVAP pressure 4 seconds after the leak detection pump is activated*1 (A). *1: The leak detection pump begins to operate as step 1/6 finishes and step 2/6 starts. Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure (B). RESULT DTC*2 Result Suspected Trouble Area Proceed to - EVAP pressure in inspection item (B) is between -4.85 kPa(gauge) and -1.057 kPa(gauge) [-36.377 mmHg(gauge) and -7.928 mmHg(gauge)] Not yet determined A P043F and P2401 EVAP pressure in inspection item (B) is -1.057 kPa(gauge) [-7.928 mmHg(gauge)] or more Reference orifice high-flow Leak detection pump stuck OFF B P043E EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-36.377 mmHg(gauge)] Reference orifice clogged C P2419 EVAP pressure in inspection item (A) is more than -0.25 kPa(gauge) [-1.875 mmHg(gauge)] Vent valve stuck closed Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) D *2: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 11 C --> See step 38 D --> See step 13 A: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 2/6 TO 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 2/6 to step 3/6 Not yet determined A P2420 No variation in EVAP pressure even after proceeding from step 2/6 to step 3/6 Vent valve stuck open (vent) Canister assembly (charcoal filter inside canister) clogged B P0451 No variation in EVAP pressure during steps 1/6 through 3/6 Canister pressure sensor output value stuck Vent valve broken (valve split in two) Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) C *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 27 C --> See step 15 A: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 3/6) Wait until the EVAP pressure change is less than 0.1 kPa(gauge) [0.75 mmHg(gauge)] for 50 seconds. Measure the EVAP pressure and record it. HINT: A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes. NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 4/6) Check the EVAP pressure in step 4/6. RESULT DTC*1 Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6 Not yet determined A P0441 *2 EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6 Purge VSV Purge VSV circuit Problems in EVAP hose between purge VSV and intake air surge tank Problems in EVAP hose between canister assembly and purge VSV ECM B P0441 Variation in EVAP pressure is less than 0.3 kPa(gauge) [2.25 mmHg(gauge)] for 10 seconds, after proceeding from step 3/6 to step 4/6 Purge VSV stuck closed Purge VSV circuit Canister assembly (charcoal filter inside canister) clogged Problems in EVAP hose between purge VSV and intake air surge tank Problems in EVAP hose between canister assembly and purge VSV ECM C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: This result suggests that due to purge line blockage or purge VSV malfunction, the DTC was stored by the purge flow monitor while the engine was running, or that key-off monitor test result were nearly borderline values. B --> See step 22 C --> See step 17 A: Go to next step
PERFORM EVAP SYSTEM CHECK (STEP 5/6) Check the EVAP pressure in step 5/6. Compare the EVAP pressure in step 3/6 and the second reference pressure (step 5/6). RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure from step 3/6 lower than second reference pressure (step 5/6) Not yet determined (no leakage from EVAP system) A P0441 and P0455 EVAP pressure from step 3/6 higher than [second reference pressure (step 5/6) x 0.2] Purge VSV stuck open EVAP gross leak B P0456 EVAP pressure from step 3/6 higher than second reference pressure (step 5/6) EVAP small leak B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. A --> See step 43 B --> See step 17
PERFORM EVAP SYSTEM CHECK (STEP 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to P043F EVAP pressure less than [reference pressure] measured in step 2/6 Reference orifice high-flow A P2401 EVAP pressure almost same as [reference pressure] measured in step 2/6 Leak detection pump stuck off B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. A --> See step 38 B --> See step 31
INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT) Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit inspection procedure. Refer to «INSPECTION PROCEDURE»(ref-494146-S30908107622012081000000) . NEXT --> See step 49
INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the ignition switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Component without harness connected (Canister Pump Module) Apply the battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply battery voltage to terminals VLVB and VGND Operating Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the ignition switch off. Disconnect the ECM connector. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A39-30 (VPMP) - g1-1 (VGND) Always Below 1 ohms A39-30 (VPMP) or g1-1 (VGND) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A NG Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to g1-4 (MGND) - Body ground Always Below 1 ohms Canister pump module Wire harness or connector between canister pump module and ECM ECM A 10 kohms or higher Wire harness or connector between canister pump module and body ground B B --> See step 40 A: Go to next step
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to A39-49 (MPMP) - g1-3 (MTRB) Always Below 1 ohms Canister pump module ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B A --> See step 45 B --> See step 40
PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control. Disconnect the hose (connected to the canister assembly) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister Assembly) Start the engine. Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF). Use your finger to confirm that the purge VSV has no suction. Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON). Use your finger to confirm that the purge VSV has suction. RESULT Test Result Suspected Trouble Area Proceed to No suction when purge VSV turned off, and suction applied when turned on Blockage in the purge line is considered (based on result of step 9): Problems with EVAP hose between canister assembly and purge VSV Canister assembly (charcoal filter inside canister) clogged ECM A Leakage is considered (based on result of step 10): Fuel cap Leakage from EVAP line, fuel tank, or canister assembly B Suction applied when purge VSV turned off Purge VSV stuck open C No suction when purge VSV turned on Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake air surge tank D B --> See step 20 C --> See step 21 D --> See step 23 A: Go to next step
INSPECT EVAP HOSE (PURGE VSV - CANISTER ASSEMBLY) Check for blockages in the EVAP purge line between the purge VSV and canister assembly. OK No blockages in the EVAP purge line between the purge VSV and canister assembly. NG --> See step 44 OK: Go to next step
INSPECT CANISTER ASSEMBLY (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister assembly. Refer to «INSPECTION»(ref-494115-S17338131952012081000000) . OK No blockages in the canister assembly. OK --> See step 47 NG --> See step 48
CHECK FUEL CAP ASSEMBLY Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications. Tighten the fuel cap firmly (only one click sound could be heard). HINT: If an EVAP tester is available, check the fuel cap using the Techstream. Remove the fuel cap and install it onto a fuel cap adapter. Connect an EVAP tester pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)] using an EVAP tester pump. Seal the adapter and wait for 2 minutes. Check the pressure. If the pressure is 2 kPa(gauge) [15 mmHg(gauge)] or more, the fuel cap is normal. RESULT Test Result Suspected Trouble Area Proceed to Fuel cap correctly installed - A Fuel cap loose Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications B Defective fuel cap - B No fuel cap - C A --> See step 37 B --> See step 35 C --> See step 36
INSPECT PURGE VSV Turn the ignition switch off. Disconnect the purge VSV connector. TEXT IN ILLUSTRATION *1 Hose (to Canister Assembly) *2 Connector *3 Purge VSV Disconnect the hose (connected to the canister assembly) from the purge VSV. Start the engine. Use your finger to confirm that the purge VSV has no suction. RESULT Test Result Suspected Trouble Area Proceed to No suction Wire harness or connector between purge VSV and ECM (short to ground) ECM A Suction applied Purge VSV B A --> See step 26 B --> See step 39
INSPECT EVAP HOSE (PURGE VSV - CANISTER ASSEMBLY) Check for blockages in the EVAP purge line between the purge VSV and canister assembly. OK No blockages in the EVAP purge line between the purge VSV and canister assembly. NG --> See step 44 OK: Go to next step
CHECK EVAP HOSE (PURGE VSV - INTAKE AIR SURGE TANK) Disconnect the hose (connected to the intake air surge tank) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to intake air surge tank) Start the engine. Use your finger to confirm that the hose has suction. RESULT Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between purge VSV and intake air surge tank normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM A No suction Intake air surge tank port EVAP hose between purge VSV and intake air surge tank B B --> See step 34 A: Go to next step
INSPECT PURGE VSV Remove the purge VSV. Apply battery voltage to the terminals of the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV Confirm that air flows from port E to port F. RESULT Test Result Condition Suspected Trouble Area Proceed to Air flows Battery voltage is applied to purge VSV terminals Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM A No air flow Battery voltage is applied to purge VSV terminals Purge VSV B B --> See step 39 A: Go to next step
CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV) Disconnect the purge VSV connector. Turn the ignition switch to ON. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Purge VSV) Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to B22-1 - Body ground Ignition switch ON 11 to 14 V Purge VSV power source normal Wire harness or connector between purge VSV and ECM A Other than result above Wire harness or connectors between purge VSV and battery B B --> See step 40 A: Go to next step
CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the ECM connector. Disconnect the purge VSV connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B22-2 - B1-63 (PRG) Always Below 1 ohms B22-2 or B1-63 (PRG) - Body ground Always 10 kohms or higher OK --> See step 47 NG --> See step 40
INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE) Turn the ignition switch off. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) - - Disconnect the canister pump module connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to g1-5 (VLVB) - Body ground Ignition switch ON 11 to 14 V Wire harness or connector between vent valve and ECM Canister pump module (vent valve) Canister assembly (charcoal filter inside canister) clogged ECM A Below 3 V Power source wire harness of vent valve B B --> See step 40 A: Go to next step
INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the ignition switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Component without harness connected (Canister Pump Module) Apply the battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply battery voltage to terminals VLVB and VGND Operating Wire harness or connector between canister pump module and ECM Canister (charcoal filter inside canister) clogged ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the ignition switch off. Disconnect the ECM connector. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to A39-30 (VPMP) - g1-1 (VGND) Always Below 1 ohms Canister assembly (charcoal filter inside canister) clogged ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
INSPECT CANISTER ASSEMBLY (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister assembly. Refer to «INSPECTION»(ref-494115-S17338131952012081000000) . OK No blockages in the canister assembly. OK --> See step 47 NG --> See step 48
PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP) Turn the ignition switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) - - Turn the ignition switch to ON. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to g1-3 (MTRB) - Body ground Leak detection pump on and off (Active Test ON and OFF) Below 3 V when OFF 9 to 14 V when ON Wire harness or connector between canister pump module and body ground Canister pump module (leak detection pump) A Below 3 V when OFF and ON Wire harness or connector between canister pump module and ECM ECM B 9 to 14 V when OFF and ON ECM C B --> See step 33 C --> See step 47 A: Go to next step
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Turn the ignition switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to g1-4 (MGND) - Body ground Always Below 1 ohms Canister pump module (leak detection pump) A 10 kohms or higher Wire harness or connector between canister pump module and body ground B A --> See step 38 B --> See step 40
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Turn the ignition switch off. Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A39-49 (MPMP) - g1-3 (MTRB) Always Below 1 ohms A39-49 (MPMP) or g1-3 (MTRB) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK ECM A NG Wire harness or connector between ECM and canister pump module B A --> See step 47 B --> See step 40
INSPECT INTAKE AIR SURGE TANK (EVAP PURGE PORT) Stop the engine. Disconnect the EVAP hose from the intake air surge tank. Start the engine. Use your finger to confirm that the port of the intake air surge tank has suction. RESULT Tester Connection Suspected Trouble Area Proceed to Suction applied EVAP hose between intake air surge tank and purge VSV A No suction Intake air surge tank B A --> See step 41 B --> See step 42
CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY HINT: When reinstalling the fuel cap, tighten it firmly (only one click sound could be heard). When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it firmly. NEXT --> See step 49
REPLACE FUEL TANK CAP ASSEMBLY HINT: When installing the fuel cap, tighten it firmly (only one click sound could be heard). NEXT --> See step 49
LOCATE EVAP LEAK PART Disconnect the vent hose. TEXT IN ILLUSTRATION *1 Fuel Tank *2 Canister Assembly - Canister Pump Module *3 Canister Filter *4 Fuel Cap *a Disconnect the vent here - - Connect the EVAP pressure tester tool to the canister pump module with the adapter. TEXT IN ILLUSTRATION *1 Canister Pump Module *2 Adapter *3 EVAP Pressure Tester Tool - - Pressurize the EVAP system to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)]. Apply soapy water to the piping and connecting parts of the EVAP system. Look for areas where bubbles appear. This indicates the leak point. Repair or replace the leak point. HINT: Disconnect the hose between the canister assembly and fuel tank from the canister assembly. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT --> See step 49
REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL»(ref-494115-S35949432492012081000000) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port (behind Fuel Tank Filler Pipe Cover) *4 Canister Filter *5 Fuel Tank *6 Canister Assembly - Canister Pump Module *a Inspection Area (Check for disconnection and/or cracks) - - NEXT --> See step 49
REPLACE PURGE VSV Replace the purge VSV. Refer to «REMOVAL»(ref-494115-S32464467342012081000000) . NEXT --> See step 49
REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 49
REPAIR OR REPLACE EVAP PURGE LINE (INTAKE AIR SURGE TANK - PURGE VSV) NEXT --> See step 49
INSPECT INTAKE AIR SURGE TANK (EVAP PURGE PORT) Check that the EVAP purge port of the intake air surge tank is not clogged. If necessary, replace the intake air surge tank. Refer to «REMOVAL»(ref-494152-S35940360142012081000000) . NEXT --> See step 49
REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in. NEXT --> See step 49
REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER ASSEMBLY) NEXT --> See step 49
REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL»(ref-494115-S35949432492012081000000) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port (behind Fuel Tank Filler Pipe Cover) *4 Canister Filter *5 Fuel Tank *6 Canister Assembly - Canister Pump Module *a Inspection Area (Check for disconnection and/or cracks) - - NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes. RESULT Result Proceed to EVAP system DTCs are output A No DTCs output (No pending DTCs output) B B --> END A: Go to next step
REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000) . NEXT --> See step 49
REPLACE CANISTER ASSEMBLY Replace the canister assembly. Refer to «REMOVAL»(ref-494115-S35949432492012081000000) . NOTE: When replacing the canister assembly, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. Check for filter blockage in the canister filter. if the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port (behind Fuel Tank Filler Pipe Cover) *4 Canister Filter *5 Fuel Tank *6 Canister Assembly - Canister Pump Module *a Inspection Area (Check for disconnection and/or cracks) - - NEXT: Go to next step
PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes. HINT: If no pending DTCs are found, the repair has been successfully completed. NEXT --> END

Scheme 519

Scheme 519: PROCEDURE

Scheme 520

Scheme 521

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B1-81 (E1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT ECM (IGSW VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A39-28 (IGSW) - Body ground Ignition switch ON 11 to 14 V RESULT Result Proceed to OK A NG (w/ Smart Key System) B NG (w/o Smart Key System) C TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) B --> See step 9 C --> See step 14 A: Go to next step
INSPECT ECM (MREL VOLTAGE) Remove the EFI MAIN relay. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 1 (EFI MAIN relay holder) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a EFI MAIN relay terminal NG --> See step 8 OK: Go to next step
INSPECT EFI MAIN RELAY Inspect the EFI MAIN relay. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-493957-S22323431022012081000000) . NG --> REPLACE EFI MAIN RELAY OK: Go to next step
CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY) Remove the EFI MAIN relay from the engine room relay block. 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 3 (EFI MAIN relay holder) - A39-3 (+B) Always Below 1 ohms 3 (EFI MAIN relay holder) - A39-2 (+B2) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 3 (EFI MAIN relay holder) or A39-3 (+B) - Body ground Always 10 kohms or higher 3 (EFI MAIN relay holder) or A39-2 (+B2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI MAIN RELAY - ECM) OK: Go to next step
CHECK HARNESS AND CONNECTOR (BATTERY - EFI MAIN RELAY) Remove the EFI MAIN relay from the engine room relay block. Disconnect the cable from the negative (-) battery terminal. Disconnect the cable from the positive (+) battery terminal. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 5 (EFI MAIN relay holder) - Battery positive (+) terminal Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 5 (EFI MAIN relay holder) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - BODY GROUND) Remove the EFI MAIN relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 2 (EFI MAIN relay holder) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 18
CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY TERMINAL - ECM) Disconnect the ECM connector. Remove the EFI MAIN relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition A39-34 (MREL) - 1 (EFI MAIN relay holder) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A39-34 (MREL) or 1 (EFI MAIN relay holder) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI MAIN RELAY - ECM) OK --> See step 19
INSPECT IG2 RELAY Inspect the IG2 relay. Refer to «ON-VEHICLE INSPECTION - Step 4»(ref-493957-S22323431022012081000000) . NG --> REPLACE IG2 RELAY OK: Go to next step
CHECK HARNESS AND CONNECTOR (IG2 RELAY - ECM) Remove the IG2 relay from the engine room relay block. 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 3 (IG2 relay holder) - A39-28 (IGSW) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 3 (IG2 relay holder) or A39-28 (IGSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (IG2 RELAY POWER SOURCE) Remove the IG2 relay from the engine room relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 5 (IG2 relay holder) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a IG2 relay terminal NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BATTERY) OK: Go to next step
CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND) Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 2 (IG2 relay holder) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (IG2 RELAY - POWER MANAGEMENT CONTROL ECU) Disconnect the power management control ECU connector. Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1 (IG2 relay holder) - A35-8 (IG2D) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1 (IG2 relay holder) - A35-8 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 17
INSPECT IGNITION SWITCH ASSEMBLY Inspect the ignition switch Assembly. Refer to «INSPECTION»(ref-494148-S22051983152012081000000) . NG --> See step 16 OK: Go to next step
CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ECM) Disconnect the ignition switch 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 D27-6 (IG2) - A39-28 (IGSW) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D27-6 (IG2) or A39-28 (IGSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY)
REPLACE IGNITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-494148-S20020660722012081000000)
GO TO SMART KEY SYSTEM. Refer to «PROBLEM SYMPTOMS TABLE»(ref-494149-S33904020322012081000000)
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

HINT

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

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

Scheme 522

Scheme 522: PROCEDURE

Scheme 523

CHECK FUEL PUMP OPERATION Check the fuel pump operation. Refer to «ON-VEHICLE INSPECTION»(ref-494145-S03208304502012081000000) . NG --> See step 5 OK: Go to next step
INSPECT FUEL PMP RELAY Inspect the FUEL PMP relay. Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-493957-S22323431022012081000000) . NG --> REPLACE F/PMP RELAY OK: Go to next step
INSPECT FUEL PUMP RESISTOR Inspect the fuel pump resistor. Refer to «INSPECTION»(ref-494150-S18373324852012081000000) . NG --> See step 14 OK: Go to next step
CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - FUEL PUMP RESISTOR) Remove the FUEL PMP relay from the engine room relay block. Disconnect the fuel pump resistor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 5 (F/PMP relay holder) - A29-1 (+B) Always Below 1 ohms 4 (F/PMP relay holder) - A29-2 (FP) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 5 (F/PMP relay holder) or A29-1 (+B) - Body ground Always 10 kohms or higher 4 (F/PMP relay holder) or A29-2 (FP) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Activate the Fuel Pump Speed Control. Check the operation of the relay while operating it using the Techstream. OK Operating noise can be heard from the relay. NG --> See step 11 OK: Go to next step
INSPECT FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY Inspect the fuel suction with pump and gauge tube assembly. Refer to «INSPECTION - Step 1»(ref-494150-S33875847532012081000000) . NG --> See step 16 OK: Go to next step
CHECK HARNESS AND CONNECTOR (FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY - FUEL PMP RELAY) Disconnect the fuel suction with pump and gauge tube assembly connector. Remove the FUEL PMP relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition g2-4 (B) - 4 (FUEL PMP relay holder) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition g2-4 (B) or 4 (FUEL PMP relay holder) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT ENGINE ROOM RELAY BLOCK (C/OPN RELAY - FUEL PMP RELAY) Remove the C/OPN relay from the engine room relay block. Remove the FUEL PMP relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 3 (C/OPN relay holder) - 2 (F/PMP relay holder) Always Below 1 ohms 3 (C/OPN relay holder) - 3 (F/PMP relay holder) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 3 (C/OPN relay holder) or 2 (FUEL PMP relay holder) - Body ground Always 10 kohms or higher 3 (C/OPN relay holder) or 3 (FUEL PMP relay holder) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *a C/OPN relay holder *b F/PMP relay holder NG --> REPLACE ENGINE ROOM RELAY BLOCK OK: Go to next step
CHECK HARNESS AND CONNECTOR (FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY - BODY GROUND) Disconnect the fuel suction with pump and gauge tube assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition g2-5 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK FUEL LINE Check the fuel lines for leaks or blockage. OK No leaks or blockage NG --> REPAIR OR REPLACE FUEL LINE OK --> REPAIR OR REPLACE FUEL SYSTEM (PRESSURE REGULATOR AND FUEL FILTER)
INSPECT C/OPN RELAY Inspect the C/OPN relay. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-493957-S22323431022012081000000) . NG --> REPLACE C/OPN RELAY OK: Go to next step
CHECK HARNESS AND CONNECTOR (C/OPN RELAY VOLTAGE) Remove the C/OPN relay from the engine room relay block. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 5 (C/OPN relay holder) - Body ground Ignition switch ON 11 to 14 V 1 (C/OPN relay holder) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a C/OPN relay holder NG --> REPLACE ENGINE ROOM RELAY BLOCK OK: Go to next step
CHECK HARNESS AND CONNECTOR (C/OPN RELAY - ECM) Remove the C/OPN relay from the engine room relay block. 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 2 (C/OPN relay holder) - A39-52 (FC) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 2 (C/OPN relay holder) or A39-52 (FC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 17
REPLACE FUEL PUMP RESISTOR. Refer to «REMOVAL»(ref-494150-S03920928592012081000000)
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
REPLACE FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY. Refer to «REMOVAL»(ref-494150-S36058867092012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

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

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Scheme 524: PROCEDURE

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PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR INTAKE CONTROL) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control. Check if operating noise can be heard when operating the intake air control valve (intake air surge tank assembly) using the Techstream. OK Operating noise can be heard. NG --> See step 2 OK --> See step 5
CHECK INTAKE AIR SURGE TANK (INTAKE AIR SURGE TANK ASSEMBLY) (VALVE OPERATION) Disconnect the intake air control valve (intake air surge tank assembly) connector. Apply battery voltage between the terminals of the intake air control valve connector. TEXT IN ILLUSTRATION *a Component without harness connected (Intake Air Control Valve (Intake Air Surge Tank Assembly)) Check the intake air control valve (intake air surge tank assembly) operation. OK Operating noise can be heard. NG --> See step 6 OK: Go to next step
CHECK TERMINAL VOLTAGE (INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK ASSEMBLY) POWER SOURCE) Disconnect the intake air control valve (intake air surge tank assembly) connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B21-2 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Intake Air Control Valve (Intake Air Surge Tank Assembly)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK ASSEMBLY)) OK: Go to next step
CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK ASSEMBLY) - ECM) Disconnect the intake air control valve (intake air surge tank 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 B21-1 - B1-62 (ACIS) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B21-1 or B1-62 (ACIS) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
REPLACE INTAKE AIR SURGE TANK ASSEMBLY. Refer to «REMOVAL»(ref-494152-S35940360142012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

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

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Scheme 526: PROCEDURE

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PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR AICS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS. Check the operation of the vacuum switching valve (for AICS) when the vacuum switching valve (for AICS) is operated using the Techstream. TEXT IN ILLUSTRATION *1 Port F *2 Port E *a Vacuum Switching Valve (for AICS) is ON *b Vacuum Switching Valve (for AICS) is OFF *c Air OK Techstream Operation Specified Condition ON Air from port E flows out through port F OFF Air from port E flows out through the air filter NG --> See step 2 OK --> See step 6
CHECK VACUUM SWITCHING VALVE (FOR AICS) Check the vacuum switching valve (for AICS). Refer to «ON-VEHICLE INSPECTION»(ref-494152-S07423720962012081000000) . NG --> REPLACE VACUUM SWITCHING VALVE (FOR AICS) OK: Go to next step
CHECK TERMINAL VOLTAGE (VACUUM SWITCHING VALVE (FOR AICS)) Disconnect the vacuum switching valve (for AICS) connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A31-1 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Vacuum Switching Valve (for AICS)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VACUUM SWITCHING VALVE (FOR AICS)) OK: Go to next step
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR AICS) - ECM) Disconnect the vacuum switching valve (for AICS) 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 A31-2 - B1-61 (AICV) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A31-2 or B1-61 (AICV) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT AIR CLEANER CAP SUB-ASSEMBLY (VACUUM SURGE TANK) Inspect the vacuum surge tank. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-494152-S41069628762012081000000) . NG --> REPAIR OR REPLACE AIR CLEANER CAP SUB-ASSEMBLY OK --> See step 7
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493954-S08606703632012081000000)
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)

Inspection Method

Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if the engine speed decreases to 1000 RPM when the brake pedal is depressed, then the brake override system has been activated.

WARNING

When carrying out the inspection, use a place where you are able to carry it out safely and also pay close attention to your surroundings. Also, when driving make absolutely sure that all road traffic laws, such as speed limits, are observed.

HINT

Under normal conditions, the Accelerator Position value changes in response to the Accel Sens. No. 1 Volt % value. For more information on the numerical values, refer to the Data List. Refer to «DATA LIST / ACTIVE TEST»(ref-493954-S11583093352012081000000) .
If the Data List values of Accelerator Position and Accel Sens. No. 1 Volt % do not match, and the value of Accelerator Position changes but the value of Accel Sens. No. 1 Volt % is constant, this confirms that brake override system has activated. (Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.)

Note. The brake override system restricts driving torque if the brake pedal is depressed when driving with the accelerator pedal depressed. If a customer reports experiencing loss of torque after the accelerator and brake pedals have both been intentionally depressed, explain to the customer that this is not a malfunction, and that the customer should avoid depressing both the accelerator and brake pedals at the same time. Example: While operating the accelerator pedal, the customer uses their left foot to operate the brake pedal.

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

Scheme 528

Scheme 528: PROCEDURE

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CHECK THAT MIL ILLUMINATES Turn the ignition switch to ON. Check the illumination of the MIL. RESULT Result Proceed to MIL remains illuminated (Even after ignition switch is turned ON and several seconds have passed, MIL still remains illuminated) A MIL remains off (Does not illuminate at all) B B --> See step 5 A: Go to next step
CHECK WHETHER MIL TURNS OFF Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Check if any DTCs have been stored. Note any DTCs. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-493954-S40015553512012081000000) . Check if the MIL goes off. RESULT Result Proceed to MIL goes off A MIL does not go off B B --> See step 3 A --> REPAIR CIRCUIT INDICATED BY OUTPUT DTC
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the ECM connector. Turn the ignition switch to ON. Check if the MIL is illuminated. RESULT Result Proceed to MIL is not illuminated A MIL is illuminated B TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) B --> See step 4 A --> See step 8
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) Disconnect the combination meter 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 D18-14 (CHK) or A39-24 (W) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
CHECK IF ENGINE STARTS Start the engine. Result Result Proceed to Engine starts A Engine does not start* B HINT: *: The Techstream cannot communicate with the ECM. B --> See step 10 A: Go to next step
CHECK HARNESS AND CONNECTOR (ECM TERMINAL VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A39-24 (W) - Body ground Ignition switch to ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> See step 7 OK --> See step 8
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) Disconnect the combination meter 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 D18-14 (CHK) - A39-24 (W) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
REPLACE ECM. Refer to «REMOVAL»(ref-493957-S32385345752012081000000)
REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL»(ref-494154-S27661358102012081000000)
GO TO VC OUTPUT CIRCUIT. Refer to «VC Output Circuit»(ref-494144-S27396216772012081000000)
REPLACE COMBINATION METER ASSEMBLY. Refer to «REMOVAL»(ref-494154-S27661358102012081000000)

Engine Control System [2GR-FE] [Diagnostic Codes [P1604-U0101] & Circuit Tests]: Diagnosis Toyota Sienna III

INSPECTION PROCEDURE

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