Toyota Avalon Service & Repair Manual: Random/Multiple Cylinder Misfire Detected (P030000,P030027,P030085-P030400)

Toyota Avalon Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Random/Multiple Cylinder Misfire Detected (P030000,P030027,P030085-P030400)

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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P030000

Random/Multiple Cylinder Misfire Detected

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 immediately when detected).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: P0300

P030027

Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold

An emission deterioration misfire occurs (2 trip detection logic).

  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on

DTC stored

SAE Code: -

P030085

Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range

A misfire occurs that may damage the three-way catalytic converter (2 trip detection logic).

  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: -

P030100

Cylinder 1 Misfire Detected

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 immediately when detected).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: P0301

P030200

Cylinder 2 Misfire Detected

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 immediately when detected).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: P0302

P030300

Cylinder 3 Misfire Detected

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 immediately when detected).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: P0303

P030400

Cylinder 4 Misfire Detected

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 immediately when detected).
  • An emission deterioration misfire occurs (MIL illuminates).
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connections
  • Ignition system
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel pressure
  • Mass air flow meter sub-assembly
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve timing
  • PCV valve and hose
  • PCV hose connections
  • Intake system
  • EGR valve assembly
  • ECM

Comes on/Blinks*

*: The MIL flashes when a catalyst-damaging misfire is detected.

DTC stored

SAE Code: P0304

When DTCs for misfiring cylinders are randomly stored, but DTC P030000 is not stored, it indicates that misfires have been detected in different cylinders at different times. DTC P030000 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 after the engine starts, an excessive number of misfires (approximately 10 to 70 misfires per 1000 crankshaft revolutions) occurs once.
  • An excessive number of misfires (approximately 10 to 70 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 damage to the three-way catalytic converter, is detected.

  • At a high engine speed, a sufficient amount of misfires to damage the catalyst occurring within 200 crankshaft revolutions is detected once.
  • At a normal engine speed, a sufficient amount of misfires to damage the catalyst occurring within 200 crankshaft revolutions is detected 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

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 sub-assembly)

Mass air flow meter sub-assembly

Frequency of Operation

Continuous

Duration

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

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

MIL Operation

2 driving cycles: Emission-related misfire

MIL flashes immediate: Catalyst-damaging misfire

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Misfire

Monitor runs whenever the following DTCs are not stored

P0016 (VVT system - misalignment)

P0017 (Exhaust VVT system - misalignment)

P0101, P0102, P0103 (Mass air flow meter)

P0107, P0108 (Manifold absolute pressure)

P0112, P0113 (Intake air temperature sensor)

P0117, P0118 (Engine coolant temperature sensor)

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

P0125 (Insufficient coolant temperature for closed loop fuel control)

P0327, P0328 (Knock control sensor)

P0335, P0337, P0338 (Crankshaft position sensor)

P0340, P0342, P0343 (Camshaft position sensor)

P0365, P0367, P0368 (Exhaust camshaft position sensor)

Auxiliary battery voltage

8 V or higher

VVT system

Not operated by scan tool

Engine speed

6100 rpm or less

Either of the following conditions is met

(a) or (b)

(a) Engine coolant temperature at engine start

Higher than -7°C (19°F)

(b) Engine coolant temperature

Higher than 20°C (68°F)

Fuel cut

Off

Monitor Period of Emission-related Misfire

First 1000 revolutions after engine start, or during check mode

Crankshaft 1000 revolutions

Except above

Crankshaft 1000 revolutions x 4

Monitor Period of Catalyst-damaging Misfire (MIL Blinks)

All of the following conditions 1, 2, 3 and 4 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 2160 rpm

4. Engine load

Less than 61%

TYPICAL MALFUNCTION THRESHOLDS

Monitor Period of Emission-related Misfire

Misfire rate

2% or higher

Monitor Period of Catalyst-damaging Misfire (MIL Blinks)

Number of misfires per 200 revolutions

119 or more (varies with engine speed and engine load)

MONITOR RESULT

Refer to detailed information in Checking Monitor Status.

Click here

P0300: Misfire / EWMA MISFIRE

Monitor ID

Test ID

Scaling

Unit

Description

$A1

$0B

Multiply by 1

Count

Total EWMA* misfire count of all cylinders in last ten driving cycles

P0300: Misfire / MISFIRE RATE

Monitor ID

Test ID

Scaling

Unit

Description

$A1

$0C

Multiply by 1

Count

  • When power switch on (IG), total misfire count of all cylinders in last driving cycle is displayed.
  • While engine is running, total misfire count of all cylinders in current driving cycle is displayed.
P0301: Misfire / EWMA MISFIRE1

Monitor ID

Test ID

Scaling

Unit

Description

$A2

$0B

Multiply by 1

Count

Total EWMA* misfire count of cylinder 1 in last ten driving cycles

P0301: Misfire / MISFIRE RATE1

Monitor ID

Test ID

Scaling

Unit

Description

$A2

$0C

Multiply by 1

Count

  • When power switch on (IG), total misfire count of cylinder 1 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed.
P0302: Misfire / EWMA MISFIRE2

Monitor ID

Test ID

Scaling

Unit

Description

$A3

$0B

Multiply by 1

Count

Total EWMA* misfire count of cylinder 2 in last ten driving cycles

P0302: Misfire / MISFIRE RATE2

Monitor ID

Test ID

Scaling

Unit

Description

$A3

$0C

Multiply by 1

Count

  • When power switch on (IG), total misfire count of cylinder 2 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed.
P0303: Misfire / EWMA MISFIRE3

Monitor ID

Test ID

Scaling

Unit

Description

$A4

$0B

Multiply by 1

Count

Total EWMA* misfire count of cylinder 3 in last ten driving cycles

P0303: Misfire / MISFIRE RATE3

Monitor ID

Test ID

Scaling

Unit

Description

$A4

$0C

Multiply by 1

Count

  • When power switch on (IG), total misfire count of cylinder 3 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed.
P0304: Misfire / EWMA MISFIRE4

Monitor ID

Test ID

Scaling

Unit

Description

$A5

$0B

Multiply by 1

Count

Total EWMA* misfire count of cylinder 4 in last ten driving cycles

P0304: Misfire / MISFIRE RATE4

Monitor ID

Test ID

Scaling

Unit

Description

$A5

$0C

Multiply by 1

Count

  • When power switch on (IG), total misfire count of cylinder 4 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed.

HINT:

*: EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles (calculated) Calculation: 0.1 x (current counts) + 0.9 x (previous average)

Initial value for (previous average) = 0

CONFIRMATION DRIVING PATTERN

HINT:

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  • Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Record the DTC(s) and Freeze Frame Data.
  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  6. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  7. Using the Techstream, switch the ECM from normal mode to check mode.

    Click here

  8. Start the engine.
  9. Read the misfire counts of each cylinder, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.
  10. 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

    4.5 minutes or more

    1000

    4.5 minutes or more

    2000

    2.5 minutes or more

    3000

    1.5 minutes or more

  11. Check whether misfires have occurred by checking DTCs and Freeze Frame Data.

    HINT:

    Do not turn the power 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.

  12. Record the DTC(s), Freeze Frame Data and misfire counts.
  13. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  14. Turn the power switch off and wait for at least 30 seconds.

WIRING DIAGRAM

Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

  • In the past, when the primary ignition system (the igniter drive circuit in the ECM, the primary circuit in the ignition coil assembly, the related wire harness, or the connector) was out of order, diagnostic codes from P035113 to P035413 were output. However, these codes are not output in this vehicle.

    When a failure in the primary ignition system is suspected, refer to "Catalyst OT Misfire Fuel Cut History", "Catalyst OT Misfire Fuel Cut Cylinder #1 to #4", and "Misfire Count Cylinder #1 to #4" in the Freeze Frame Data, the pending Freeze Frame Data, and the Data List, and confirm in which cylinder the high-frequency misfire was concentrated.

  • Referring to the following contents of the Freeze Frame Data (or the pending Freeze Frame Data) enables an estimation of which cylinder has misfired and to what degree.
    • Misfire Count Cylinder #1 to #4: Misfire count according to cylinder.
    • Catalyst OT Misfire Fuel Cut Cylinder #1 to #4: This expresses a high-frequency misfire was concentrated in a certain cylinder and that cylinder's fuel injection was stopped.
  • If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
  • 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 in the tank.
    2. Improper fuel was used.
    3. The spark plugs have been contaminated.
    4. The problem requires further diagnosis.
  • After finishing repairs, check the misfire counts of the cylinders (Misfire Count Cylinder #1 to Misfire Count Cylinder #4).
  • Be sure to confirm that no misfiring cylinder DTCs are stored again by performing the confirmation driving pattern after finishing repairs.
  • When one of Short FT B1S1, Long FT B1S1 in the Freeze Frame Data is outside the range of +/-20%, the air fuel ratio may be rich (-20% or less) or lean (+20% or higher).
  • When Coolant Temperature in the Freeze Frame Data is less than 75°C (167°F), the misfires have occurred only while warming up the engine.
  • Vehicle body vibration caused by an extremely imbalanced drive wheel may cause misfire DTCs to be stored.
  • 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.

PROCEDURE

1.

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

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output

A

DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 and other DTCs are output

B

HINT:

If any DTCs other than P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK PCV VALVE AND HOSE CONNECTIONS

(a) Check the PCV hose connections.

(b) Check the PCV valve.

Click here

OK:

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

NG

REPAIR OR REPLACE PCV VALVE OR HOSE

OK

3.

READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

Powertrain > Engine > Data List

Tester Display

Misfire RPM

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 MISFIRE FUEL CUT)

(a) Enter the following menus: Powertrain / Engine / Data List / Catalyst OT Misfire Fuel Cut.

Powertrain > Engine > Data List

Tester Display

Catalyst OT Misfire Fuel Cut

(b) Read the value displayed on the Techstream.

Data List

Result

Proceed to

Catalyst OT Misfire Fuel Cut

Avail

A

Not Avi

B

B

GO TO STEP 7

A

5.

READ FREEZE FRAME DATA (CATALYST OT MISFIRE FUEL CUT HISTORY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Using the Techstream, confirm the vehicle conditions recorded in the Freeze Frame Data which were present when the DTC was stored.

Powertrain > Engine > DTC(P030000) > Freeze Frame Data

Tester Display

Catalyst OT Misfire Fuel Cut History

Freeze Frame Data Item

Result

Proceed to

Catalyst OT Misfire Fuel Cut History

ON

A

OFF

B

B

GO TO STEP 7

A

6.

CHECK MISFIRE COUNT OF PORT INJECTION

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(f) Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire Prevent Fuel Cut / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display

Prohibit the Catalyst OT Misfire Prevent Fuel Cut

Data List Display

Coolant Temperature

Injection Mode

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

(g) Read each value for Misfire Count Cylinder #1 to Misfire Count Cylinder #4 and Injection Mode displayed on the Techstream while performing the Active Test.

Injection Mode

Misfire Count

Proceed to

Port

1 or 2 cylinders have misfire counts

A

3 cylinders or more have misfire counts

There are no misfire counts

B

A

GO TO STEP 8

B

GO TO STEP 11

7.

CHECK MISFIRE COUNT OF PORT INJECTION

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display

Control the Injection Mode

Data List Display

Coolant Temperature

Injection Mode

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

(g) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Port. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.

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

CAUTION:

When performing a driving test, obey all speed limits and traffic laws.

(2) Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the Techstream [B].

Injection Mode

Misfire Count

Proceed to

Port

1 or 2 cylinders have misfire counts

A

3 cylinders or more have misfire counts

There are no misfire counts

B

B

GO TO STEP 11

A

8.

CHECK MISFIRE COUNT OF DIRECT INJECTION

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display

Control the Injection Mode

Data List Display

Coolant Temperature

Injection Mode

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

(g) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.

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

CAUTION:

When performing a driving test, obey all speed limits and traffic laws.

(2) Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the Techstream [B].

Misfire Count

Proceed to

Port (Result of step 6 or 7)

Direct

1 or 2 cylinders have misfire counts

1 or 2 cylinders have misfire counts

A

3 cylinders or more have misfire counts

3 cylinders or more have misfire counts

B

1 or 2 cylinders have misfire counts

There are no misfire counts

C

3 cylinders or more have misfire counts

There are no misfire counts

D

HINT:

Perform "Inspection After Repair" after replacing the port fuel injector assembly.

Click here

A

GO TO STEP 14

B

GO TO STEP 17

C

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER)

D

9.

CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)

(a) Check the fuel pressure (for low pressure side).

Click here

HINT:

Perform "Inspection After Repair" after replacing the port fuel injector assembly.

Click here

OK

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER)

NG

10.

CHECK FUEL LINE

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

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

Click here

OK

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

NG

REPAIR OR REPLACE FUEL SYSTEM

11.

CHECK MISFIRE COUNT OF DIRECT INJECTION

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display

Control the Injection Mode

Data List Display

Coolant Temperature

Injection Mode

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

(g) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.

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

CAUTION:

When performing a driving test, obey all speed limits and traffic laws.

(2) Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the Techstream [B].

Misfire Count

Proceed to

Port (Result of step 6 or 7)

Direct

There are no misfire counts

There are misfire counts

A

There are no misfire counts

There are no misfire counts

B

HINT:

Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

Click here

A

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

B

12.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

13.

CHECK MISFIRE COUNT

(a) Turn the power switch on (IG).

(b) Turn the Techstream on.

(c) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(d) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(e) Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature, Injection Mode, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, Misfire RPM and Misfire Load.

Powertrain > Engine > Data List

Tester Display

Coolant Temperature

Injection Mode

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

Misfire RPM

Misfire Load

(f) Drive the vehicle with Misfire RPM and Misfire Load.

CAUTION:

When performing a driving test, obey all speed limits and traffic laws.

(g) Monitor all of the misfire count values and Injection Mode displayed on the Techstream.

Misfire Count

Injection Mode

Proceed to

There are no misfire counts

-

A

1 or 2 cylinders have misfire counts

Port or Either

B

3 cylinders or more have misfire counts

Port or Either

C

There are misfire counts

Direct

D

HINT:

Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

Click here

A

CHECK FOR INTERMITTENT PROBLEMS

C

GO TO STEP 17

D

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

B

14.

INSPECT SPARK PLUG

(a) Inspect the spark plug of the misfiring cylinder.

Click here

HINT:

Perform "Inspection After Repair" after replacing the spark plug.

Click here

NG

REPLACE SPARK PLUG

OK

15.

CHECK FOR SPARK (SPARK TEST)

(a) Perform a spark test.

Click here

HINT:

  • If the result of the spark test is normal, proceed to the next step.
  • Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly.

    Click here

NEXT

16.

CHECK CYLINDER COMPRESSION PRESSURE

(a) Measure the cylinder compression pressure of the misfiring cylinder.

Click here

HINT:

Perform "Inspection After Repair" after repairing or replacing the engine assembly.

Click here

OK

REPLACE ECM

NG

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

17.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

Click here

OK:

No leaks from intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

Click here

NG

REPAIR OR REPLACE INTAKE SYSTEM

OK

18.

READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display

Coolant Temperature

(e) Read the Data List twice, when the engine is both cold and warmed up.

Standard:

Techstream Display

Condition

Specified Condition

Coolant Temperature

Cold engine

Same as ambient air temperature

Warm engine

Between 75 and 100°C (167 and 212°F)

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

Click here

NG

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

OK

19.

READ VALUE USING TECHSTREAM (MASS AIR FLOW SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

(f) Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.

Powertrain > Engine > Data List

Tester Display

Engine Speed

Mass Air Flow Sensor

Coolant Temperature

(g) Read Mass Air Flow Sensor while maintaining an engine speed of 2500 rpm.

HINT:

During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, read the Data List after charge control has completed.

Standard:

Techstream Display

Condition

Specified Condition

Mass Air Flow Sensor

  • Engine warmed up
  • Shift position: P
  • A/C: Off
  • Engine Speed: 2500 rpm

Between 6.2 and 18.6 gm/sec

NG

GO TO STEP 26

OK

20.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

HINT:

The A/C switch and all accessories should be off.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure, Coolant Temperature and Engine Independent.

Powertrain > Engine > Active Test

Active Test Display

Control the EGR Step Position

Data List Display

Intake Manifold Absolute Pressure

Coolant Temperature

Engine Independent

(g) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.

NOTICE:

  • Make sure that the value of Data List item Engine Independent is "Operate" while performing the Active Test.
  • Do not leave the EGR valve open for 10 seconds or more during the Active Test.
  • Be sure to return the EGR valve to step 0 when the Active Test is completed.
  • Do not open the EGR valve 30 steps or more during the Active Test.

OK:

The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".

Standard:

-

EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Intake Manifold Absolute Pressure

(Data List)

(EGR valve is fully closed)

Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

HINT:

  • If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Perform the Active Test after charge control is complete ("Operate" is displayed).
  • While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be a malfunctioning.
  • Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.
OK

GO TO STEP 22

NG

21.

INSPECT EGR VALVE ASSEMBLY

(a) Remove the EGR valve assembly.

Click here

(b) Check if the EGR valve is stuck open.

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Click here

NG

REPLACE EGR VALVE ASSEMBLY

OK

22.

CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

(a) Remove the cylinder head cover sub-assembly.

Click here

(b) Turn the crankshaft pulley and align its groove with the TDC timing mark of the timing chain cover.

(c) Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

HINT:

If the timing marks are not as shown, turn the crankshaft one revolution clockwise.

OK:

Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

HINT:

If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.

*a

Timing Mark

*b

TDC Timing Mark

*c

Groove

OK

GO TO STEP 26

NG

23.

CHECK ENGINE MECHANICAL SYSTEM

(a) Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

HINT:

Perform "Inspection After Repair" after repairing or replacing the engine mechanical system.

Click here

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

24.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

25.

CONFIRM WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)

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

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

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

GO TO STEP 26

26.

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)

(a) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.

Click here

HINT:

Repair any problems.

NEXT

27.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

28.

CHECK WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)

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

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

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

B

A

END

B

29.

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

(a) Disconnect the mass air flow meter sub-assembly connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C28-3 (5V) - C55-78 (VCVG)

Always

Below 1 Ω

C28-1 (FG) - C55-101 (VG)

Always

Below 1 Ω

C28-2 (E2G) - C55-79 (E2G)

Always

Below 1 Ω

C28-3 (5V) or C55-78 (VCVG) - Body ground and other terminals

Always

10 kΩ or higher

C28-1 (FG) or C55-101 (VG) - Body ground and other terminals

Always

10 kΩ or higher

C28-2 (E2G) or C55-79 (E2G) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

30.

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

(a) Replace the mass air flow meter sub-assembly.

Click here

HINT:

  • If the results of the inspections performed in step 19 (READ VALUE USING TECHSTREAM (MASS AIR FLOW SENSOR)) indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly.
  • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

    Click here

NEXT

31.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

32.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

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

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

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

B

A

END

B

REPLACE ECM

    Evaporative Emission System Switching Valve Actuator Stuck On (P24507E,P24517F)

    Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground (P032511)

    See More:

    Toyota Avalon Service & Repair Manual > Dynamic Radar Cruise Control System(for Gasoline Model): Vehicle Information Not Obtained (C1A02)
    DESCRIPTION When a new driving support ECU assembly is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or AWD, etc.) from the main body ECU (multiplex network body ECU) and stores the information. DTC C1A02 is stored when the driving support ECU as ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

    © 2024 Copyright www.tavalon.net
    0.0167