P3193
2AZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: P3190,P3191,P3193: Poor Engine Power
DTC P3190 - Poor Engine Power
DTC P3191 - Engine does not Start
DTC P3193 - Fuel Run Out
DESCRIPTION
There are two primary control roles for the hybrid vehicle control ECU. One role is engine control, the other role is hybrid system control. In the hybrid vehicle control ECU, there is a section equivalent to the ECM, and a section responsible for hybrid system control. These two exchange signals such as required engine power output (required output), estimated torque produced by the engine (estimated torque), target engine speed, whether the engine is in start mode or not.
Based on the required output and target engine speed, the ECM calculates a target torque that is to be produced and compares it to the estimated torque. If the estimated torque is very low compared to the target torque, or if the engine start mode continues for the duration that is calculated based on coolant temperature, an abnormal condition is detected.
MONITOR DESCRIPTION
There are two primary control roles for the hybrid vehicle control ECU. One role is engine control, the other role is hybrid system control. In the hybrid vehicle control ECU, there is a section equivalent to the ECM which is responsible for engine control, and a section referred to as the hybrid vehicle control ECU that is responsible for hybrid system control. These two exchange signals using CAN communication. The ECM sends information such as engine speed to the hybrid vehicle control ECU, and the hybrid vehicle control ECU sends information such as required engine power to the ECM, using CAN communication. When this communication is normal, and the following items meet specific conditions, the MIL will be illuminated and a DTC will be set.
1. Engine speed
2. Power switch
3. Target torque
4. Ratio of target torque against estimated torque
5. Fuel level
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Case1: P3190
Case2: P3191
Case3: P3193
INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream or the OBD II scan tool. The ECM (included in the hybrid vehicle control ECU) 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 running or stopped, 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)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream or the OBD II scan tool on.
(d) On the Techstream, select the items: Powertrain / Engine / Trouble Code.
(e) Read the DTCs using the Techstream or the OBD II scan tool.
Result:
HINT: If any other codes besides P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first.
B -- GO TO DTC CHART
A -- Continue to next step.
2. CHECK FOR FUEL (SHORTAGE OF FUEL)
NG -- REFILL FUEL
OK -- Continue to next step.
3. CHECK AIR INDUCTION SYSTEM
OK:
The air induction system has no leakage and blockages.
NG -- REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK -- Continue to next step.
4. CHECK FOR SYMPTOMS
(a) Check for unusual noise or vibration when starting the engine or when the engine is revving up.
OK:
Unusual noise and vibration do not occur.
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
5. CHECK FUEL PRESSURE
(a) Check the fuel pressure Testing and Inspection.
Standard:
304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44.1 to 49.7 psi)
NG -- CHECK AND REPLACE FUEL SYSTEM
OK -- Continue to next step.
6. INSPECT MASS AIR FLOW METER ASSEMBLY
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the tester on.
(c) Enter the following menus: Powertrain / Engine / Data List / All Data / MAF.
Standard:
0.50 g/s or less
(d) Inspect resistance.
(1) Measure the resistance between the terminals of the mass air flow meter.
Standard resistance:
(e) Reinstall the mass air flow meter.
NG -- REPLACE MASS AIR FLOW METER ASSEMBLY
OK -- Continue to next step.
7. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Remove the engine coolant temperature sensor.
(b) Measure the resistance between the terminals of the engine coolant temperature sensor.
Standard resistance:
NOTICE: In case of checking the engine coolant temperature sensor in water, be careful not to allow water to contact the terminals. After checking, dry the sensor.
HINT: Alternate procedure: Connect an ohmmeter to the installed engine coolant temperature sensor and read the resistance. Use an infrared thermometer to measure the engine temperature in the immediate vicinity of the sensor. Compare these values to the resistance/temperature graph. Change the engine temperature (warm up or allow to cool down) and repeat the test.
(c) Reinstall the engine coolant temperature sensor.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR
OK -- Continue to next step.
8. INSPECT CRANKSHAFT POSITION SENSOR
(a) Disconnect the C20 crankshaft position sensor connector.
(b) Measure the resistance between the terminals of the crankshaft position sensor connector.
Standard resistance:
(c) Reconnect the crankshaft position sensor connector.
NOTICE: Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10°C to 50°C (14°F to 122°F). "Hot" means approximately 50°C to 100°C (122°F to 212°F).
NG -- REPLACE CRANKSHAFT POSITION SENSOR
OK -- Continue to next step.
9. INSPECT CAMSHAFT POSITION SENSOR
(a) Disconnect the C31 camshaft position sensor connectors.
(b) Measure the resistance between the terminals of camshaft position sensor connector.
Standard resistance:
(c) Reconnect the camshaft position sensor connector.
NOTICE: Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10°C to 50°C (14°F to 122°F). "Hot" means approximately 50°C to 100°C (122°F to 212°F).
NG -- REPLACE CAMSHAFT POSITION SENOR
OK -- Continue to next step.
10. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the motor resistance between terminals 1 (M-) and 2 (M+).
Standard resistance:
NG -- REPLACE THROTTLE BODY ASSEMBLY
OK -- Continue to next step.
11. INSPECT THROTTLE POSITION SENSOR
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine / Data List / Throttle Sens Open Pos #1 and Throttle Sens Open Pos #2.
(d) Check the values displayed on the tester.
Standard voltage:
NG -- REPLACE THROTTLE BODY ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU