Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Poor Engine Power (P319000,P319100)

DESCRIPTION

The ECM receives signals from the hybrid vehicle control ECU assembly such as the requested engine torque, target engine speed and engine cranking status, and controls the engine output based on the target engine speed and requested torque.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P319000

Poor Engine Power

When all of the following conditions are met (1 trip detection logic):

  • The engine speed is 650 rpm or more (varies depending on the engine coolant temperature).
  • Engine torque requested by the hybrid vehicle control ECU exceeds a certain value.
  • The hybrid vehicle control ECU assembly judges that the engine has started.
  • The fuel tank is not empty.
  • Communication between the hybrid vehicle control ECU assembly and ECM is normal.
  • The actual engine torque is less than 20% of the requested engine torque for 6 seconds, or until the crankshaft rotates 100 times (whichever takes longer, differs depending on the engine coolant temperature).
  • Intake system
  • Throttle with motor body assembly
  • Fuel system
  • Engine assembly
  • Mass air flow meter sub-assembly
  • Out of fuel
  • Engine coolant temperature sensor
  • Crankshaft position sensor
  • Camshaft position sensor
  • EGR valve assembly
  • Fuel pump control circuit
  • PCV valve and hose
  • PCV hose connections
  • ECM

Comes on

DTC stored

SAE Code: P3190

P319100

Engine does not Start

When all of the following conditions are met (1 trip detection logic):

  • The engine speed is 650 rpm or more (varies depending on the engine coolant temperature).
  • The fuel tank is not empty.
  • Communication between the hybrid vehicle control ECU assembly and ECM is normal.
  • After the hybrid vehicle control ECU assembly sends the engine start request signal, it does not detect engine start (generation of engine torque) for 6 seconds, or until the crankshaft rotates 100 times (whichever takes longer, differs depending on the engine coolant temperature).
  • Intake system
  • Throttle with motor body assembly
  • Fuel system
  • Engine assembly
  • Mass air flow meter sub-assembly
  • Out of fuel
  • Engine coolant temperature sensor
  • Crankshaft position sensor
  • Camshaft position sensor
  • EGR valve assembly
  • Fuel pump control circuit
  • PCV valve and hose
  • PCV hose connections
  • ECM

Comes on

DTC stored

SAE Code: P3191

MONITOR DESCRIPTION

  1. The ECM receives signals such as requested engine torque, target engine speed and engine cranking status from the hybrid vehicle control ECU assembly.
  2. The ECM controls engine start and stop and the throttle valve angle based on the signals received from the hybrid vehicle control ECU assembly.
  3. The ECM receives the actual engine torque calculated by the hybrid vehicle control ECU assembly based on the generator torque.
  4. When the actual engine torque is less than 20% of the requested engine torque*, the ECM judges that the engine output is abnormal and stores DTC P319000.

    (The engine may not have started in the above situation.)

    • *: Requested torque = Requested Engine Torque (kW) / HV Target Engine Speed (rpm) x 9549
  5. If the ECM does not detect engine start torque (actual engine torque) even though it has received an engine start request and started the engine, it stores DTC P319100.

    HINT:

    • When DTCs P319000, P319100 and P319300 are output, the engine may be stopped due to the engine condition.

      At this time, after adding fuel or performing repairs, clear the DTCs. Then turn the power switch off to return to the normal condition.

    • When this DTC is output and the engine is stopped, the HV battery cannot be charged since the vehicle is driven with the motor only. If the vehicle continues to be driven under this condition, the HV battery will become depleted and the power switch will not be able to be turned on (READY).
    • When DTC P319000 or P319100 is stored, the engine torque has dropped by 80% or the engine cannot be started. If any DTCs that indicate malfunctioning of engine related parts are stored at the same time, repair the malfunctioning parts first.
    • If engine knock is detected due to mechanical noise or a knock control sensor being loose, the ignition timing (Knock F/B Value, Knock Correct Learn Value) may be excessively retarded and DTC P319000 may be stored.

      Relevant Data List Items:

      ECM (Powertrain / Engine / Data List)

      HV Target Engine Speed

      Engine Speed

      Requested Engine Torque

      Actual Engine Torque

      Throttle Position Command

      Throttle Position Sensor No.1 Voltage

      Calculate Load

      Coolant Temperature

      Short FT B1S1

      Long FT B1S1

      Target EGR Valve Position No.1

      Ignition Timing Cylinder #1

      Knock F/B Value

      Knock Correct Learn Value

      -

      -

      Hybrid Vehicle Control ECU (Powertrain / Hybrid Control / Data List)

      Target Engine Revolution

      Engine Speed

      Target Engine Power

      Coolant Temperature

      Engine Idling Request

      -

      -

      -

MONITOR STRATEGY

Related DTCs

P3190: Poor engine power

P3191: Engine does not start

Required Sensors/Components (Main)

Crankshaft position sensor

Required Sensors/Components (Related)

Hybrid vehicle control ECU assembly

Frequency of Operation

Continuous

Duration

100 engine revolutions or 6 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P3190 and P3191

Monitor runs whenever the following DTCs are not stored

None

Fuel cut operation

Not operated

Engine speed

650 rpm or more (varies with engine coolant temperature)

Communication with hybrid vehicle control ECU assembly

No malfunction

TYPICAL MALFUNCTION THRESHOLDS

P3190

Time for low engine torque

100 engine revolutions or more, and 6 seconds or more (varies with engine coolant temperature)

Fuel level

Not empty

Ratio of estimated torque against target torque

Less than 20%

P3191

Engine start no-determination time (receive from hybrid vehicle control ECU)

100 engine revolutions or more, and 6 seconds or more (varies with engine coolant temperature)

Fuel level

Not empty

Engine speed is a fixed value or more

-

CONFIRMATION DRIVING PATTERN

NOTICE:

If the MIL or a master warning light illuminates, immediately end the confirmation driving pattern. If DTCs P319000, P319100 and P319300 are output and the engine is stopped, the HV battery will no longer be chargeable and the distance that the vehicle can be driven will be limited.

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

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

    Click here

  1. Apply the parking brake firmly.
  2. Connect the Techstream to the DLC3.
  3. Turn the power switch on (IG).
  4. Turn the Techstream on.
  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  6. Turn the power switch off and wait for at least 30 seconds.
  7. Turn the power switch on (READY).
  8. Turn the Techstream on.
  9. Fully depress the accelerator pedal for 10 seconds with the vehicle stopped, the shift lever in P and the brake pedal depressed [A].

    NOTICE:

    As soon as the engine starts, release the accelerator pedal.

  10. Release the parking brake.
  11. Drive the vehicle at an average of approximately 40 km/h (25 mph) or more until the total engine operation time is 10 minutes or more [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT:

    • It is not necessary to maintain the vehicle speed at 40 km/h (25 mph) throughout the road test.
    • If the engine stops, further depress the accelerator pedal to restart the engine.
  12. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  13. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  15. Input the DTC: P319000 or P319100.
  16. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system is malfunctioning.
    • If the judgment result shows INCOMPLETE, perform the Confirmation Driving Pattern and check the DTC judgment result again.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

NOTICE:

  • 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:

  • Performing this diagnosis procedure repeatedly for symptom confirmation may cause the SOC to drop, preventing the system from entering the READY-on state. In this case, use the THS charger to charge the HV battery.
  • Cranking the engine once causes the SOC to drop approximately 1%.
  • Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.
  • Charging the HV battery using the THS charger takes approximately 10 minutes when the HV battery temperature is 25°C (77°F) or approximately 30 minutes when the HV battery temperature is 0°C (32°F).
  • The THS charger is a supplemental charging device that charges the HV battery enough to enable the engine to start (the vehicle can enter the READY-on state).
  • 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 DTC P319000, P319100 AND/OR P319300)

(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) Check for DTCs and freeze frame data and write them down.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P319000 or P319100 are output

A

DTC P319300 is output

B

DTC P319000, P319100 and/or P319300 and other DTCs are output

C

HINT:

If any SFI system DTCs other than DTC P319000, P319100 or P319300 are output, perform troubleshooting for those DTCs first.

B

GO TO DTC P319300

C

GO TO DTC CHART

A

2.

CHECK SHORTAGE OF FUEL

(a) Check the amount of fuel remaining.

OK:

There is enough fuel.

HINT:

  • DTCs P319000, P319100 and/or P319300 may be output if the vehicle ran out of fuel in the past.
  • If not enough fuel is added, DTC P319000, P319100 or P319300 may be output again. If the engine cannot be started because the vehicle is out of fuel, add fuel until the fuel level warning turns off.
NG

REFILL FUEL

OK

3.

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

4.

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

5.

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

6.

CHECK FOR UNUSUAL NOISE OR VIBRATION WHEN STARTING ENGINE OR REVVING

OK:

Unusual noise and vibration do not occur.

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS

OK

7.

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 fuel pump (for low pressure side).

Click here

NG

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

OK

8.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY

(a) Inspect the throttle body with motor assembly.

Click here

HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Click here

NG

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

OK

9.

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

(a) Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.

Click here

(b) Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.

Click here

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Click here

NG

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

OK

10.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

(a) Inspect the engine coolant temperature sensor.

Click here

HINT:

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

Click here

NG

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

OK

11.

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:

-

Control the 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 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.
  • If the Active Test cannot be performed due to a malfunction such as the engine not starting, perform the EGR valve assembly inspection the following step.
OK

GO TO STEP 13

NG

12.

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

13.

REPLACE CRANKSHAFT POSITION SENSOR

(a) Replace the crankshaft position sensor.

Click here

NEXT

14.

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

15.

CHECK WHETHER DTC OUTPUT RECURS (DTC P319000 OR P319100)

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

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

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P319000 or P319100 is output

B

A

END

B

16.

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

(a) Replace the camshaft position sensor (for intake camshaft).

Click here

NEXT

17.

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

18.

CHECK WHETHER DTC OUTPUT RECURS (DTC P319000 OR P319100)

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

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

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P319000 or P319100 is output

B

A

END

B

19.

REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT)

(a) Replace the camshaft position sensor (for exhaust camshaft).

Click here

NEXT

20.

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

21.

CHECK WHETHER DTC OUTPUT RECURS (DTC P319000 OR P319100)

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

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

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P319000 or P319100 is output

B

A

END

B

22.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

23.

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

24.

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 / Trouble Codes.

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes
NEXT

END

    Engine Coolant Bypass Valve Circuit Short to Ground (P268111,P268115)

    Fuel Run Out (P319300)

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