SFI SYSTEM, Diagnostic DTC:P3190, P3191

DTC Code DTC Name
P3190 Poor Engine Power
P3191 Engine does not Start

DESCRIPTION

The ECM receives signals from the power management control ECU 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. DTC Detection Condition Trouble Area
P3190

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


  • Engine speed is 650 rpm or more (varies depending on the engine coolant temperature).

  • Engine torque requested by the power management control ECU exceeds a certain level.

  • The power management control ECU judges that the engine has started.

  • The fuel tank is not empty.

  • Communication between the power management control ECU and ECM is normal

  • "The actual engine torque is less than 20% of the requested engine torque" for 6 seconds, or until the crankshaft turns 100 times (whichever takes longer, differs depending on the engine coolant temperature).

  • Intake system

  • Throttle with motor body assembly

  • Fuel system

  • Engine

  • Mass air flow meter sub-assembly

  • Out of fuel

  • Engine coolant temperature sensor

  • Crankshaft position sensor

  • Camshaft position sensor

  • EGR valve assembly

  • ECM
P3191

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


  • Engine speed is 650 rpm or more (varies depending on the engine coolant temperature).

  • The fuel tank is not empty.

  • Communication between the power management control ECU and ECM is normal.

  • After the power management control ECU sends the engine start request signal, it does not detect engine start (generation of engine torque) for 6 seconds, or until the crankshaft turns 100 times (whichever takes longer, differs depending on the engine coolant temperature).

  • Intake system

  • Throttle with motor body assembly

  • Fuel system

  • Engine

  • Mass air flow meter sub-assembly

  • Out of fuel

  • Engine coolant temperature sensor

  • Crankshaft position sensor

  • Camshaft position sensor

  • EGR valve assembly

  • ECM

MONITOR DESCRIPTION


  1. The ECM receives signals such as requested engine torque, target engine speed and engine cranking status from the power management control ECU.

  2. The ECM controls engine start and stop and the throttle valve angle based on the signals received from the power management control ECU.

  3. The ECM receives the actual engine torque calculated by the power management control ECU based on the generator torque.

  4. When the actual engine torque is less than 20% of the requested engine torque*1, the ECM judges that the engine output is abnormal and stores DTC P3190.

    (The engine may not start in the above condition.)

    *1: 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 P3191.

    Tech Tips


    • If DTC P3190, P3191 or P3193 is stored, engine operation may be disabled depending on the engine condition. In this case, add fuel or perform a repair, then clear the DTCs and turn the power switch off to allow the operation to return to normal.

    • If DTC P3190, P3191 or P3193 is stored and engine operation is disabled, the HV battery will not be charged as the vehicle will operate using only the motor. If the vehicle is driven in this condition, the SOC will drop and the HV battery will be depleted, preventing the system from entering the READYon state.

    • When DTC P3190 or P3191 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.

Relevant Data List Items
ECM (Powertrain / Engine and ECT / Data List)
HV Target Engine Speed Engine Speed Requested Engine Torque Actual Engine Torque
Throttle Position Command Throttle Position No. 1 Calculate Load Coolant Temp
Short FT #1 Long FT #1 EGR Step Position -
POWER MANAGEMENT CONTROL ECU (Powertrain / Hybrid Control / Data List)
Target Engine Rev Engine Revolution Requested Engine Torque Engine Coolant Temp
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) Power management control ECU
Frequency of operation Continuous
Duration 100 engine revolutions or 6 seconds
MIL operation Immediately
Sequence of operation None

TYPICAL ENABLING CONDITIONS

P3190 and P3191
Monitor runs whenever following DTCs not present None
Fuel cut operation Not operated
Engine speed 650 rpm or more (varies with engine coolant temperature)
Communication with power management control ECU 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 power management 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

Note

If the MIL or master warning light illuminates, stop the road test immediately. If DTC P3190, P3191 or P3193 is stored and engine operation is disabled, the vehicle can be driven only a short distance as the HV battery will not be charged.

A01I47QE08

  1. Apply the parking brake firmly.

  2. Connect the Techstream to the DLC3.

  3. Turn the power switch on (IG) and turn the Techstream on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the power switch off and wait for at least 30 seconds.

  6. Turn the power switch on (READY) and turn the Techstream on.

  7. Fully depress the accelerator pedal for 10 seconds with the vehicle stopped, the shift lever in P and the brake pedal depressed. [A]

    Note

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

  8. Drive the vehicle at an average of approximately 75 km/h (47 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.

    Tech Tips

    It is not necessary to maintain the vehicle speed at 75 km/h (47 mph) throughout the road test.

  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. [C]

  10. Read the DTCs (include pending DTCs).

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P3190 or P3191.

  13. 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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, idle the engine for 10 seconds or more and check the DTC judgment result again.

  14. If no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

Tech Tips


  • Repeating this inspection 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 or approximately 30 minutes when the HV battery temperature is 0°C.

  • 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 OTHER DTC OUTPUT (IN ADDITION TO DTC P3190, P3191 AND/OR P3193)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P3190 or P3191 is output A
      DTC P3193 is output B
      DTC P3190, P3191 and/or P3193 and other DTCs are output C

      Tech Tips

      If any DTCs other than P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC P3193 Click here

    C

    GO TO DTC CHART Click here

    A

  2. CHECK SHORTAGE OF FUEL


    1. Check the amount of fuel remaining.

      OK
      There is enough fuel.

      Tech Tips


      • DTCs P3190, P3191 and/or P3193 may be output if the vehicle ran out of fuel in the past.

      • If not enough fuel is added, DTC P3190, P3191 or P3193 may be output again. If the engine cannot be started because the vehicle is out of fuel, add fuel until the fuel level warning light turns off.


    NG

    REFILL FUEL

    OK

  3. CLEAR DTC


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs.

    5. Turn the power switch off and wait for at least 30 seconds.


    NEXT

  4. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks Click here.

      OK
      No leaks in intake system.

      Tech Tips

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


    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  5. CHECK FOR UNUSUAL NOISE OR VIBRATION WHEN STARTING ENGINE OR REVVING UP

    OK
    Unusual noise and vibration do not occur.

    NG

    REPAIR OR REPLACE MALFUNCTIONING PART

    OK

  6. CHECK FUEL PRESSURE


    1. Check the fuel pressure Click here.


    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    OK

  7. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY


    1. Inspect the throttle with motor body assembly Click here.

      Tech Tips

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


    NG

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    OK

  8. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


    1. Inspect the mass air flow meter sub-assembly Click here.

      Tech Tips

      Perform "Inspection After Repair" after replacing the mass air flow meter assembly Click here.


    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    OK

  9. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor Click here.

      Tech Tips

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


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  10. INSPECT CRANKSHAFT POSITION SENSOR


    1. Inspect the crankshaft position sensor Click here.


    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

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


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Put the engine in inspection mode Click here.

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

      Tech Tips

      The A/C switch and all accessory switches should be off.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

    7. Confirm that the Throttle Idle Position is ON and check the MAP value in the Data List while performing the Active Test.

      Tech Tips


      • 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 Active Test is completed.

      • Do not open the EGR valve 30 steps or more during the Active Test.

      OK
      MAP change in response to EGR step position when Throttle Idle Position is ON in the Data List.
      Standard
      - EGR Step Position (Active Test)
      0 Steps 0 to 30 Steps

      MAP

      (Data List)

      		 (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed

      Tech Tips


      • While performing the Active Test, if the increase in the value of MAP 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 MAP may occur while performing the Active Test. However, the amount that the value of MAP 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 value assembly inspection in the following step.

      Result
      Result Proceed to
      Outside standard range A
      Within standard range B

    B

    REPLACE CAMSHAFT POSITION SENSOR Click here

    A

  12. INSPECT EGR VALVE ASSEMBLY


    1. Remove the EGR valve assembly Click here.

    2. Check if the EGR valve is stuck open.

      OK
      EGR valve is tightly closed.

      Tech Tips

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


    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  13. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.


    NEXT

  14. CHECK WHETHER DTC OUTPUT RECURS (DTC P3190 OR P3191)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

    5. Turn the power switch off and wait for at least 30 seconds.

    6. Turn the power switch on (IG) and turn the Techstream on.

    7. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

    9. Read the pending DTCs.

      Result
      Result Proceed to
      DTC P3190 or P3191 is output A
      DTC is not output B

    B

    END

    A

  15. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  16. CONFIRM WHETHER DTC MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTC Click here.

    5. Turn the power switch off and wait for at least 30 seconds.

    6. Turn the power switch on (IG) and turn the Techstream on.

    7. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    8. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    9. Input the DTC: P3190 or P3191.

    10. Check the DTC judgment result.


    NEXT

    END