Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIA0
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0300-P0306; Random / Multiple Cylinder Misfire Detected; 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0300

Random / Multiple Cylinder Misfire Detected

DTC

P0301

Cylinder 1 Misfire Detected

DTC

P0302

Cylinder 2 Misfire Detected

DTC

P0303

Cylinder 3 Misfire Detected

DTC

P0304

Cylinder 4 Misfire Detected

DTC

P0305

Cylinder 5 Misfire Detected

DTC

P0306

Cylinder 6 Misfire Detected

DESCRIPTION

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause an increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also cause increases in the three-way catalytic converter temperature, which may cause damage to the three-way catalytic converter. To prevent this increase in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire count. When the temperature of the three-way catalytic converter reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the camshaft position sensor and the crankshaft position sensor. The camshaft position sensor is used to identify any misfiring cylinders and the crankshaft position sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire count exceeds the threshold levels, and could cause emission control system performance deterioration, the ECM illuminates the MIL and stores a DTC.

DTC No.

DTC Detection Condition

Trouble Area

P0300

Simultaneous misfiring of several cylinders occurs and one of the following conditions is met (2 trip detection logic):

  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks when detect immediately).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Fuel injector assembly
  • Fuel pressure
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • ECM

P0301

P0302

P0303

P0304

P0305

P0306

Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic):

  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks when detect immediately).
  • An emission deterioration misfire occurs (MIL illuminates).

When DTCs for misfiring cylinders are stored, but DTC P0300 is not stored, it indicates that misfires have been detected in different cylinders at different times. DTC P0300 is only stored when several misfiring cylinders are detected at the same time.

MONITOR DESCRIPTION

The ECM illuminates the MIL and stores a DTC when either one of the following conditions, which could cause emission deterioration, is detected (2 trip detection logic).

  • Within the first 1000 crankshaft revolutions of the engine starting, an excessive misfiring rate (approximately 10 to 50 misfires per 1000 crankshaft revolutions) occurs once.
  • An excessive misfiring rate (approximately 10 to 50 misfires per 1000 crankshaft revolutions) occurs a total of 4 times.

The ECM flashes the MIL (immediate detection logic) and stores a DTC (2 trip detection logic) when either one of the following conditions, which could cause the three-way catalytic converter damage, is detected.

  • At a high engine speed, a catalyst damage misfire, which is monitored every 200 crankshaft revolutions, occurs once.
  • At a normal engine speed, a catalyst damage misfire, which is monitored every 200 crankshaft revolutions, occurs 3 times.

HINT:

If a catalyst damage misfire occurs, the ECM informs the driver by flashing the MIL.

Misfire Monitor for Mexico Models

The ECM illuminates the MIL and stores a DTC when either one of the following conditions, which could cause emission deterioration, is detected (2 trip detection logic).

  • Within the first 1000 crankshaft revolutions of the engine starting, an excessive misfiring rate (approximately 332 misfires per 1000 crankshaft revolutions) occurs once.
  • An excessive misfiring rate (approximately 166 misfires per 1000 crankshaft revolutions) occurs a total of 4 times.

The ECM flashes the MIL and stores a DTC when the following condition, which could cause the three-way catalytic converter damage, is detected (2 trip detection logic).

  • A catalyst damage misfire, which is monitored every 200 crankshaft revolutions, occurs 3 times.

MONITOR STRATEGY

Related DTCs

P0300: Multiple cylinder misfire

P0301: Cylinder 1 misfire

P0302: Cylinder 2 misfire

P0303: Cylinder 3 misfire

P0304: Cylinder 4 misfire

P0305: Cylinder 5 misfire

P0306: Cylinder 6 misfire

Required Sensors/Components (Main)

Crankshaft position sensor

Camshaft position sensor

Required Sensors/Components (Related)

Engine coolant temperature

Intake air temperature sensor

Mass air flow meter

Frequency of Operation

Continuous

Duration

1000 crankshaft revolutions (soon after engine is started: 1 time, other 4 times) (Emissions-related misfire)

200 crankshaft revolutions (1 or 3 times) (Catalyst-damaging misfire)

MIL Operation

2 driving cycles: Emissions-related misfire

MIL flashes immediately: Catalyst-damaging misfire

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Misfire

Monitor runs whenever following DTCs not stored

P0016, P0018 (VVT system bank 1, 2 - misalignment)

P0017, P0019 (Exhaust VVT System bank 1, 2 - Misalignment)

P0102, P0103 (Mass air flow meter)

P0112, P0113 (Intake air temperature sensor)

P0115, P0117, P0118 (Engine coolant temperature sensor)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)

P0125 (Insufficient coolant temperature for closed loop fuel control)

P0327, P0328, P0332, P0333 (Knock sensor)

P0335 (Crankshaft position sensor)

P0340 (VVT sensor)

P0351, P0352, P0353, P0354, P0355, P0356 (Igniter)

P0500 (Vehicle Speed Sensor)

P0705 (Shift lever position switch)

Battery voltage

8 V or higher

VVT system

Not operated by scan tool

Engine speed

450 rpm or more, and 6400 rpm or less

Either of the following conditions is met

Condition (a) or (b)

(a) Engine coolant temperature at engine start

More than -7°C (19°F)

(b) Engine coolant temperature

More than 20°C (68°F)

Fuel cut

OFF

Monitor Period of Emission-Related-Misfire

First 1000 revolutions after engine start, or Check Mode

Crankshaft 1000 revolutions

Except above

Crankshaft 1000 revolutions x 4

Monitor Period of Catalyst-Damaged-Misfire (MIL blinks)

All of the following conditions 1, 2, and 3 are met

Crankshaft 200 revolutions x 3

Except above (MIL blinks immediately)

Crankshaft 200 revolutions

1. Driving cycles

1st

2. Check mode

OFF

3. Engine speed

Less than 2400 rpm

4. Intake air amount per revolution

Less than 1.3 g/rev

FOR MEXICO MODELS

Misfire

Monitor runs whenever following DTCs are not present

P0016, P0018 (VVT system bank 1, 2 - misalignment)

P0017, P0019 (Exhaust VVT system bank 1, 2 - misalignment)

P0102, P0103 (Mass air flow meter)

P0112, P0113 (Intake air temperature sensor)

P0115, P0117, P0118 (Engine coolant temperature sensor)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)

P0125 (Insufficient engine coolant temperature for closed loop)

P0327, P0328, P0332, P0333 (Knock sensor)

P0335 (Crankshaft position sensor)

P0340 (VVT sensor)

P0351, P0352, P0353, P0354, P0355, P0356 (Igniter)

P0500 (Vehicle speed sensor)

P0705 (Shift lever position switch)

Battery voltage

8 V or higher

VVT system

Not operated by scan tool

Engine speed

450 to 6500 rpm

Either of the following conditions is met:

Condition (a) or (b)

(a) Engine coolant temperature at engine start

More than -7°C (19°F)

(b) Engine coolant temperature

More than 20°C (68°F)

Fuel cut

OFF

Monitor Period of Emission-Related-Misfire

First 1000 revolutions after engine start, or check mode

Crankshaft 1000 revolutions

Except above

Crankshaft 1000 revolutions x 4

Monitor Period of Catalyst-Damage-Misfire (MIL Blinks)

All of the following conditions 1 and 2 are met:

Crankshaft 200 revolutions

1. Driving cycle

1st

2. Check mode

OFF

Except above (MIL blinks immediately)

Crankshaft 200 revolutions x 3

TYPICAL MALFUNCTION THRESHOLDS

Monitor Period of Emission-Related-Misfire

Misfire rate

1% or more

Monitor Period of Catalyst-Damaged-Misfire (MIL Blinks)

Number of misfire per 200 revolutions

94 or more (varies with intake air amount and rpm)

FOR MEXICO MODELS

Monitor Period of Emission-Related-Misfire

Misfire rate (for Mexico model)

33.2% or more: for 1st 1000 revolutions

16.6% or more: after 1st 1000 revolutions

Monitor Period of Catalyst-Damage-Misfire (MIL Blinks)

Number of misfire per 200 revolutions

94 or more (varies with intake air amount and engine speed)

Paired cylinders misfire (MIL blinks immediately)

Detected

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Record the DTC(s) and freeze frame data.
  5. Clear DTCs (even if no DTCs are stored, perform the Clear DTC procedure) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).
  6. Using the Techstream, switch the ECM from normal mode to check mode (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: CHECK MODE PROCEDURE ).
  7. Read the misfire counts of each cylinder, Cylinder #1 Misfire Count to Cylinder #6 Misfire Count, with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.
  8. Drive the vehicle so that the vehicle conditions displayed in Misfire RPM and Misfire Load of the Data List are the same as the freeze frame data. Perform this step several times.

    HINT:

    • In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in the table below, confirm the Misfire RPM and Misfire Load in the Data List.

    Engine speed

    Duration

    Idling

    8.0 minutes or more

    1000

    4.5 minutes or more

    2000

    2.5 minutes or more

    3000

    1.5 minutes or more

  9. Check whether misfires have occurred by checking DTCs and freeze frame data.

    HINT:

    Do not turn the ignition switch off until the output DTC(s) and freeze frame data have been recorded. When the ECM returns to normal mode (default), the stored DTC(s), freeze frame data and other data are cleared.

  10. Record the DTC(s), freeze frame data and misfire counts.
  11. Turn the ignition switch off and wait for at least 30 seconds.
  12. Clear DTCs (even if no DTCs are stored, perform the Clear DTC procedure) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

  • If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
  • Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  • If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored in the ECM as freeze frame data.
  • If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame data have been reproduced, one of the following factors is considered to be a possible cause of the problem:
    1. There was insufficient fuel volume in the tank.
    2. Improper fuel is used.
    3. The spark plugs have been contaminated.
  • After finishing repairs, check the misfire counts of the cylinders ( [Cylinder #1 Misfire Count to Cylinder #6 Misfire Count]).
  • Be sure to confirm that no misfiring cylinder DTCs are stored again by conducting the confirmation driving pattern after finishing repairs.
  • For 6 and 8 cylinder engines, the ECM intentionally does not store the specific misfiring cylinder DTCs at high engine speed. If misfires occur only in high engine speed areas, only DTC P0300 is stored.

    In the event of DTC P0300 being present, perform the following operations:

    1. Clear the DTC (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).
    2. Start the engine and conduct the confirmation driving pattern.
    3. Read the misfiring rates of each cylinder or DTC(s) using the Techstream.
    4. Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC.
    5. After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not stored.
  • When one of Short FT #1, Long FT #1, Short FT #2 or Long FT #2 in the freeze frame data is outside the range of +/-15%, the air fuel ratio may be Rich (-15% or less) or Lean (+15% or more).
  • When the Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfire has occurred only while warming up the engine.
  • An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs to be stored

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read DTCs.

Result

Result

Proceed to

DTC P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 are output

A

DTC P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs are output

B

HINT:

If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and P0306 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK PCV HOSE CONNECTIONS

(a) Check the PCV hose connections (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE EMISSION CONTROL: PCV VALVE: COMPONENTS ).

OK:

PCV valve and hose are connected correctly and are not damaged.

NG

REPAIR OR REPLACE PCV HOSE

OK

3.

READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Misfire RPM and Misfire Load.

(e) Read and note the Misfire RPM and Misfire Load values.

HINT:

The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred.

NEXT

4.

READ VALUE USING TECHSTREAM (CATALYST OT MF F/C)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Catalyst OT MF F/C.

(e) Read the value displayed on the Techstream.

Result

Data List

Techstream Display

Proceed to

Catalyst OT MF F/C

Avail

A

Not Avl

B

B

GO TO STEP 6

A

5.

PERFORM ACTIVE TEST USING TECHSTREAM (PROHIBIT CAT OT F/C)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire prevent F/C.

(e) Perform the Active Test.

NOTICE:

When performing the Active Test, make sure the vehicle is stopped and either idling or being revved within 3000 rpm.

NEXT

6.

READ VALUE USING TECHSTREAM (CYLINDER MISFIRE COUNT)

(a) Enter the following menus: Powertrain / Engine / Data List / Cylinder #1 Misfire Count, Cylinder #2 Misfire Count, Cylinder #3 Misfire Count, #4 Misfire Count, #5 Misfire Count and Cylinder #6 Misfire Count.

(b) Start the engine and allow the engine to idle.

(c) Read each value for Cylinder #1 Misfire Count to Cylinder #6 Misfire Count displayed on the Techstream.

If no misfire counts occur in any cylinders, perform steps (d) and (e) and then check the misfire counts again.

(d) Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using Techstream (Misfire RPM and Misfire Load)" procedures above.

(e) Read the Cylinder #1 Misfire Count to Cylinder #6 Misfire Count or DTCs displayed on the Techstream.

Result

Result

Proceed to

Most misfires occur in only 1 or 2 cylinders

A

3 cylinders or more have equal misfire counts

B

HINT:

  • If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal.
  • If the freeze frame data's record of the ECT is below 75°C (167°F), the misfire may be detected only when the engine is cold.
  • If the freeze frame data's record of the Engine Run Time is below 120 seconds, the misfire may be detected immediately after the engine is started.
B

GO TO STEP 17

A

7.

INSPECT SPARK PLUG

(a) Inspect the spark plug of the misfiring cylinder (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after replacing the spark plug (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPLACE SPARK PLUG

OK

8.

CHECK FOR SPARKS AND IGNITION (SPARK TEST)

(a) Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors to prevent the engine from starting.

CAUTION:

Always disconnect all the fuel injector assembly connectors.

(b) Remove the ignition coil assembly from the cylinder head.

(c) Perform a spark test (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

GO TO STEP 32

OK

9.

CHECK CYLINDER COMPRESSION PRESSURE

(a) Measure the cylinder compression pressure of the misfiring cylinder (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the engine system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

OK

10.

CHECK ECM TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND /OR #60)

(a) Disconnect the ECM connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B1-86 (#10) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-109 (#20) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-85 (#30) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-108 (#40) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-84 (#50) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-107 (#60) - B1-43 (E01)

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to ECM)

NG

GO TO FUEL INJECTOR CIRCUIT

OK

11.

CHECK FUEL INJECTOR OF MISFIRING CYLINDER

(a) Check the fuel injector injection (whether fuel volume is high or low, and whether injection pattern is poor) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL INJECTOR: INSPECTION ).

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPLACE FUEL INJECTOR ASSEMBLY

OK

12.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leak.

OK:

No leaks from intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPAIR OR REPLACE INTAKE SYSTEM

OK

13.

CHECK FUEL PRESSURE

(a) Check the fuel pressure (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION+ ).

NG

GO TO STEP 34

OK

14.

READ VALUE USING TECHSTREAM (COOLANT TEMP)

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0171,P0172,P0174,P0175; System Too Lean (Bank 1)+

NG

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

OK

15.

READ VALUE USING TECHSTREAM (MAF)

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0171,P0172,P0174,P0175; System Too Lean (Bank 1)+

NG

GO TO STEP 27

OK

16.

CHECK VALVE TIMING

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0011,P0012,P0021,P0022; Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)+

OK

GO TO STEP 27

NG

CHECK ENGINE MECHANICAL SYSTEM

17.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

OK:

No leaks from intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPAIR OR REPLACE INTAKE SYSTEM

OK

18.

CHECK FUEL PRESSURE

(a) Check the fuel pressure (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION+ ).

NG

GO TO STEP 34

OK

19.

READ VALUE USING TECHSTREAM (COOLANT TEMP)

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0171,P0172,P0174,P0175; System Too Lean (Bank 1)+

NG

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

OK

20.

READ VALUE USING TECHSTREAM (MAF)

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0171,P0172,P0174,P0175; System Too Lean (Bank 1)+

NG

GO TO STEP 27

OK

21.

CHECK VALVE TIMING

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0011,P0012,P0021,P0022; Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)+

NG

CHECK ENGINE MECHANICAL SYSTEM

OK

22.

INSPECT SPARK PLUG

(a) Remove the ignition coil assembly and the spark plug from the misfiring cylinder.

(b) Inspect the spark plug of the misfiring cylinder (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after replacing the spark plug (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPLACE SPARK PLUG

OK

23.

CHECK FOR SPARKS AND IGNITION (SPARK TEST)

(a) Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors to prevent the engine from starting.

CAUTION:

Always disconnect all the fuel injector assembly connectors.

(b) Remove the ignition coil assembly from the cylinder head.

(c) Perform a spark test (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

GO TO STEP 32

OK

24.

CHECK CYLINDER COMPRESSION PRESSURE

(a) Measure the cylinder compression pressure of the misfiring cylinder (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION+ ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the engine assembly (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

OK

25.

INSPECT ECM TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND /OR #60)

(a) Disconnect the ECM connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B1-86 (#10) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-109 (#20) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-85 (#30) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-108 (#40) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-84 (#50) - B1-43 (E01)

Ignition switch ON

11 to 14 V

B1-107 (#60) - B1-43 (E01)

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to ECM)

NG

GO TO FUEL INJECTOR CIRCUIT

OK

26.

CHECK FUEL INJECTOR OF MISFIRING CYLINDER

(a) Check the fuel injector injection (whether fuel volume is high or low, and whether injection pattern is poor) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL INJECTOR: INSPECTION ).

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPLACE FUEL INJECTOR ASSEMBLY

OK

27.

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER CONNECTOR CONNECTION)

(a) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM (See page 2016 - 2020 MY Sienna [12/2015 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

HINT:

Repair any problems.

NEXT

28.

CHECK WHETHER DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Turn the ignition switch to ON.

(g) Turn the Techstream on.

(h) Start the engine.

(i) Warm up the engine.

(j) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(k) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

(l) Input the DTC: P0300, P0301, P0302, P0303, 0304, P0305 or P0306.

(m) Check the DTC judgment result.

Result

Result

Proceed to

ABNORMAL (P0300, P0301, P0302, P0303, 0304, P0305 or P0306 is output)

A

NORMAL (DTC is not output)

B

B

END

A

29.

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0102,P0103; Mass Air Flow Circuit Low+

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

30.

REPLACE MASS AIR FLOW METER

(a) Replace the mass air flow meter (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): MASS AIR FLOW METER: REMOVAL ).

HINT:

  • If the results of the inspections performed in steps 15 and 20 indicated no problem, proceed to the next step without replacing the mass air flow meter.
  • Perform "Inspection After Repair" after replacing the mass air flow meter (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).
NEXT

31.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Turn the ignition switch to ON.

(g) Turn the Techstream on.

(h) Start the engine.

(i) Warm up the engine.

(j) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(k) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

(l) Input the DTC: P0300, P0301, P0302, P0303, 0304, P0305 or P0306.

(m) Check the DTC judgment result.

Result

Result

Proceed to

NORMAL

(DTC is not output)

A

ABNORMAL

(P0300, P0301, P0302, P0303, 0304, P0305 or P0306 is output)

B

A

END

B

REPLACE ECM

32.

CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER

(a) Change the installed spark plug to a spark plug that functions normally.

(b) Perform a spark test (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION+ ).

CAUTION:

Always disconnect all injector connectors.

NOTICE:

Do not crank the engine for more than 2 seconds.

(1) Install the spark plug to the ignition coil assembly and connect the ignition coil assembly connector.

(2) Disconnect the fuel injector assembly connector.

(3) Ground the spark plug.

(4) Check if sparks occur while the engine is being cranked.

OK:

Sparks jump across electrode gap.

HINT:

Perform "Inspection After Repair" after replacing the spark plug (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE SPARK PLUG

NG

33.

CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER

(a) Change the ignition coil assembly to an ignition coil assembly that functions normally.

(b) Perform a spark test.

CAUTION:

Always disconnect all injector connectors.

NOTICE:

Do not crank the engine for more than 2 seconds.

(1) Install the spark plug to the ignition coil assembly and connect the ignition coil assembly connector.

(2) Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors.

(3) Ground the spark plug.

(4) Check if sparks occur while the engine is being cranked.

OK:

Sparks jump across electrode gap.

HINT:

Perform "Inspection After Repair" after replacing the ignition coil assembly (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE IGNITION COIL ASSEMBLY

NG

REPLACE ECM

34.

CHECK FUEL LINE

(a) Check the fuel lines for leaks or blockage.

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE FUEL PUMP

NG

REPAIR OR REPLACE FUEL LINE