SFI SYSTEM(w/o EGR 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.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P3190	Poor Engine Power	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 body with motor assembly Fuel system Engine Mass air flow meter sub-assembly Out of fuel Engine coolant temperature sensor Crankshaft position sensor Camshaft position sensor ECM	Comes on	DTC stored
P3191	Engine does not Start	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 body with motor assembly Fuel system Engine Mass air flow meter sub-assembly Out of fuel Engine coolant temperature sensor Crankshaft position sensor Camshaft position sensor ECM	Comes on	DTC stored

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P3190

Poor Engine Power

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 body with motor assembly
Fuel system
Engine
Mass air flow meter sub-assembly
Out of fuel
Engine coolant temperature sensor
Crankshaft position sensor
Camshaft position sensor
ECM

Comes on

DTC stored

P3191

Engine does not Start

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 body with motor assembly
Fuel system
Engine
Mass air flow meter sub-assembly
Out of fuel
Engine coolant temperature sensor
Crankshaft position sensor
Camshaft position sensor
ECM

Comes on

DTC stored

MONITOR DESCRIPTION

The ECM receives signals such as requested engine torque, target engine speed and engine cranking status from the power management control ECU.
The ECM controls engine start and stop and the throttle valve angle based on the signals received from the power management control ECU.
The ECM receives the actual engine torque calculated by the power management control ECU based on the generator torque.
When the actual engine torque is less than 20 % of the requested engine torque*1, the ECM judges that 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

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

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

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

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

Note

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


*1	40 km/h
*2	READY ON
*3	Total engine operation time of 10 min. or more

Apply the parking brake firmly.
Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (READY) and turn the GTS on.
Fully depress the accelerator pedal for 10 seconds with the vehicle stopped, park (P) selected and the brake pedal depressed. [A]

Note

As soon as the engine starts, release the accelerator pedal.
Release the parking brake.
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.

Tech Tips

It is not necessary to maintain the vehicle speed at 40 km/h (25 mph) throughout the road test.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. [C]
Read the DTCs (include pending DTCs).
Tech Tips
- If a DTC (include pending DTC) is output, the system is malfunctioning.
- If a DTC (include pending DTC) is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P3190 or P3191.

Check the DTC judgment result.

GTS 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 INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

CAUTION / NOTICE / HINT

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 (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 GTS. 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

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P3190, P3191 AND/OR P3193)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Check the DTCs and freeze frame data, and then write them down.