P3190
3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P3190: Poor Engine Power
DTC P3190 - Poor Engine Power
DTC P3191 - Engine does not Start
DTC P3193 - Fuel Run Out
DESCRIPTION
From the hybrid vehicle ECU, the ECM (Included in hybrid vehicle control ECU) receives data such as power output required for the engine (required output), estimated torque produced by the engine (estimated torque), engine RPM of control target (target RPM), whether the engine is in start mode or not. Then, based on the required output and target RPM, the ECM (Included in hybrid vehicle control ECU) calculates a target torque that is to be produced by the engine and compares it with the estimated torque. If the estimated torque is very low compared with the target torque, or the engine start mode continues for the specific duration calculated by water temperature, an abnormal condition is detected.
MONITOR DESCRIPTION
The ECM (included in the hybrid vehicle control ECU) and hybrid vehicle control ECU are connected by a communication line called CAN. The ECM (Included in hybrid vehicle control ECU) sends information on the engine speed and other data to the hybrid vehicle control ECU while the hybrid vehicle control ECU sends the information such as a requirement for the engine power to the ECM (Included in hybrid vehicle control ECU) using the CAN communication line. When the communication between the ECM (Included in hybrid vehicle control ECU) and hybrid vehicle control ECU is normal and the following items become specific condition, the ECM (Included in hybrid vehicle control ECU) will illuminate the MIL and set a DTC.
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. 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
PROCEDURE
1. CHECK ANY OTHER DTCS 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 on.
(d) On the Techstream, select the items: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result:
HINT: If any codes other than P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first.
B -- GO TO DTC CHART Diagnostic Trouble Code Descriptions
A -- Continue to next step.
2. CHECK SHORTAGE OF FUEL
NG -- REFILL FUEL
OK -- Continue to next step.
3. CHECK INTAKE SYSTEM
OK:
The air induction system has no leakage and blockages.
NG -- REPAIR OR REPLACE INTAKE SYSTEM
OK -- Continue to next step.
4. 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 -- Continue to next step.
5. CHECK FUEL PRESSURE
(a) Check the fuel pressure Testing and Inspection.
NG -- CHECK AND REPLACE FUEL SYSTEM
OK -- Continue to next step.
6. INSPECT MASS AIR FLOW METER ASSEMBLY
(a) Inspect the mass air flow meter Testing and Inspection.
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 according to the value(s) in the table below.
Standard resistance:
NOTE: When checking the engine coolant temperature sensor in water, be careful not to allow water to contact the terminals. After checking, dry the sensor.
HINT: Alternative 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 crankshaft position sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reconnect the crankshaft position sensor connector.
NG -- REPLACE CRANKSHAFT POSITION SENSOR
OK -- Continue to next step.
9. INSPECT VVT SENSOR
(a) Disconnect the VVT sensor connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reconnect the VVT sensor connector.
NG -- REPLACE VVT SENSOR
OK -- Continue to next step.
10. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Measure the resistance according to the value(s) in the table below.
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 Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Sens Open Pos #1 and Throttle Sens Open Pos #2.
(d) Check the values displayed on the Techstream.
Standard voltage:
NG -- REPLACE THROTTLE BODY ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU