2ad-fhv Engine Difficult to Start or Stalling

NOTICE:

1. After replacing the ECM, the new ECM needs registration and initialization.
2. After replacing a supply pump, the ECM needs initialization.
3. After replacing an injector, the ECM needs registration.

HINT:

1. Specified values in the following troubleshooting flowchart are for reference only. Variations in the Data List values may occur depending on the measuring conditions or the vehicle's age. Do not assume the vehicle is normal when the Data List outputs standard values. There may be concealed factors of the malfunction.
2. If the vehicle runs out of fuel while the engine is operating, there is a chance that the engine may be difficult to restart after the fuel is refilled.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / DTC.

4. Read DTCs.

   Result:

   Display (DTC Output)	Proceed to
   No output	A
   DTCs related to engine	B

1. Check that the fuel filter is not clogged.

   OK:

   Fuel filter is not clogged.

1. Check the engine cranking condition.

2. Compare the cranking condition with that of a normal engine of the same model, and carefully check if there is any difference between them.

   OK:

   Engine cranking condition is normal.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.

4. Read the value.
    

   Standard value:

    

   Item	Inspection Condition	Reference Value
   Fuel Press	Cranking, and engine coolant temperature 0°C (32°F) or more	20 to 55 MPa

1. Check if initial combustion occurs.

   Result:

   Result	Proceed to
   No initial combustion with cold engine	A
   No initial combustion with hot engine	B
   Initial combustion occurs	C

1. Check the lighting duration of the glow indicator light.

   OK:

   Indicator lighting time is normal.

1. Connect the intelligent tester to the DLC3.

2. Start the engine and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.

4. Check that the internal fuel pressure of the common rail is within the specification below.

   Standard value:

   Engine Speed	Fuel Pressure
   Idling	Approximately 37 to 43 MPa
   3,000 rpm (No engine load)	Approximately 60 to 66 MPa

1. Inspect the engine condition.

1. Connect the intelligent tester to the DLC3.

2. Start the engine and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List.

4. Select the following menu items in order and read the values.

   1. Fuel Press
   2. Injection Volume
    

   Standard value:

    

   Item	Engine Speed*	Reference Value
   Fuel Press	Idling	37 to 43 MPa
   Fuel Press	2,000 rpm (No engine load)	47 to 53 MPa
   Fuel Press	3,000 rpm (No engine load)	60 to 66 MPa
   Injection Volume	Idling	3.9 to 7.0 mm3
   Injection Volume	2,000 rpm (No engine load)	5.6 to 9.1 mm3
   Injection Volume	3,000 rpm (No engine load)	7.9 to 11.4 mm3

   HINT:

   *: If no idling conditions are specified, the shift lever should be in the neutral position, and the A/C switch and all accessory switches should be OFF.

1. Check the cylinder compression pressure.

   Standard pressure:

   2,700 kPa (27.5 kgf/cm², 392 psi)

   Minimum pressure:

   2,200 kPa (22.4 kgf/cm², 319 psi)

   Difference between each cylinder:

   500 kPa (5.1 kgf/cm², 73 psi)

1. Disconnect the B36, B37, B38, and B39 injector connectors.

2. Disconnect the B50 and B58 EDU connectors.

3. Measure the resistance of the wire harness side connectors.

   Standard resistance:

   Tester Connection	Specified Condition
   B36-1 - B58-2 (IJ1+)	Below 1 ?
   B37-1 - B58-5 (IJ2+)	Below 1 ?
   B38-1 - B58-4 (IJ3+)	Below 1 ?
   B39-1 - B58-1 (IJ4+)	Below 1 ?
   B36-2 - B50-4 (IJ1-)	Below 1 ?
   B37-2 - B50-5 (IJ2-)	Below 1 ?
   B38-2 - B50-6 (IJ3-)	Below 1 ?
   B39-2 - B50-1 (IJ4-)	Below 1 ?
   B36-1 or B58-2 (IJ1+) - Body ground	10 k? or higher
   B37-1 or B58-5 (IJ2+) - Body ground	10 k? or higher
   B38-1 or B58-4 (IJ3+) - Body ground	10 k? or higher
   B39-1 or B58-1 (IJ4+) - Body ground	10 k? or higher
   B36-2 or B50-4 (IJ1-) - Body ground	10 k? or higher
   B37-2 or B50-5 (IJ2-) - Body ground	10 k? or higher
   B38-2 or B50-6 (IJ3-) - Body ground	10 k? or higher
   B39-2 or B50-1 (IJ4-) - Body ground	10 k? or higher

4. Reconnect the injector connectors.

5. Reconnect the EDU connectors.

1. Connect the intelligent tester to the DLC3.

2. Start the engine and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Cylinder #1, #2, #3 and #4 Fuel Cut.

4. Check the engine idle speed while the fuel injection to each cylinder is cut using the tester.

   Result:

   Engine Idling Condition	Proceed to
   Becomes unstable	A
   Does not change	B

   HINT:

   Replace the injector mounted on the cylinder that causes no significant idle speed change.

1. Disconnect the inlet hose from the supply pump.

2. Operate the priming pump and check that the fuel is being supplied to the supply pump.

   OK:

   Fuel is properly supplied to the supply pump when the priming pump is operated.

3. Reconnect the inlet hose.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.

4. Read the value.

   Standard value:

   Between 75 and 95°C (167 and 203°F) with warm engine.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

4. Read the value.

   Standard value:

   Between 750 to 1,000 rpm with warm engine (A/C switch OFF).

w/ Entry and start system:
 

1. Remove the ST relay from the No. 8 relay block.

2. Disconnect the A12 ECM connector.

3. Measure the resistance of the wire harness side connectors.

   Standard resistance:

   Tester Connection	Specified Condition
   ST relay terminal 1 - A12-43 (STA)	Below 1 ?
   ST relay terminal 1 or A12-43 (STA) - Body ground	10 k? or higher

4. Reinstall the ST relay.

5. Reconnect the ECM connector.

w/o Entry and start system:

6. Inspect the STA fuse.

   1. Remove the STA fuse from the engine room No. 1 relay block.

   2. Measure the resistance of the fuse.

      Standard resistance:

      Below 1 ?

   3. Reinstall the STA fuse.

7. Check the wire harness between the ignition switch and ECM.

   1. Disconnect the E5 ignition switch connector.

   2. Disconnect the A12 ECM connector.

   3. Measure the resistance of the wire harness side connectors.

      Standard resistance:

      Tester Connection	Specified Condition
      E5-8 (ST2) - A12-43 (STA)	Below 1 ?
      E5-8 (ST2) or A12-43 (STA) - Body ground	10 k? or higher

   4. Reconnect the ignition switch.

   5. Reconnect the ECM connector.

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.

4. Read the value.

   Standard value:

   37 to 43 MPa engine idling.

1. Remove the engine coolant temperature sensor.

2. Measure the resistance of the sensor.

   Standard resistance:

   Connection	Specified Condition
   20°C (68°F)	2.32 to 2.59 k?
   80°C (176°F)	0.310 to 0.326 k?

   NOTICE:

   When checking the sensor in water, keep the terminals dry. After the check, wipe the sensor dry.

   HINT:

   Alternative procedure: Connect an ohmmeter to the installed ECT sensor and read the resistance. Use an infrared thermometer to measure the engine temperature in the immediate vicinity of the sensor. Compare these values against the resistance/ temperature graph. Change the engine temperature (warm up or cool down) and repeat the test.

3. Reconnect the engine coolant temperature sensor.

1. Disconnect the B42 crankshaft position sensor connector.

2. Measure the resistance of the sensor.

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   B42-1 (NE) - B42-2 (NE-)	Cold	835 to 1,400 ?
   B42-1 (NE) - B42-2 (NE-)	Hot	1,060 to 1,645 ?

   HINT:

   In the table above, the terms "Cold" and "Hot" refer to the temperature of the coils in the sensors. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

3. Reconnect the crankshaft position sensor connector.

1. Disconnect the B60 fuel pressure sensor connector.

2. Measure the resistance of each terminal of the fuel pressure sensor.

   Standard resistance:

   Tester Connection	Specified Condition
   B60-5 (PR) - B60-4 (E2)	16.4 k? or less
   B60-2 (PR2) - B60-3 (E2S)	16.4 k? or less
   B60-5 (PR) - B60-6 (VC)	3 k? or less
   B60-2 (PR2) - B60-1 (VC2)	3 k? or less

3. Reconnect the fuel pressure sensor connector.

1. Disconnect the B60 fuel pressure sensor connector.

2. Disconnect the B32 ECM connector.

3. Measure the resistance of the wire harness side connectors.

   Standard resistance:

   Tester Connection	Specified Condition
   B60-5 (PR) - B32-67 (PCR1)	Below 1 ?
   B60-2 (PR2) - B32-114 (PCR2)	Below 1 ?
   B60-1 (VCS) - B32-68 (VCS)	Below 1 ?
   B60-6 (VC) - B32-69 (VCM)	Below 1 ?
   B60-4 (E2) - B32-91 (E2M)	Below 1 ?
   B60-3 (E2S) - B32-66 (E2S)	Below 1 ?
   B60-5 (PR) or B32-67 (PCR1) - Body ground	10 k? or higher
   B60-2 (PR2) or B32-114 (PCR2) - Body ground	10 k? or higher
   B60-1 (VCS) or B32-68 (VCS) - Body ground	10 k? or higher
   B60-6 (VC) or B32-69 (VCM) - Body ground	10 k? or higher
   B60-4 (E2) or B32-91 (E2M) - Body ground	10 k? or higher
   B60-3 (E2S) or B32-66 (E2S) - Body ground	10 k? or higher

4. Reconnect the fuel pressure sensor connector.

5. Reconnect the ECM connector.

1. Replace the ECM.

   NOTICE:

   After replacing the ECM, the new ECM needs registration and initialization.

2. Check if the engine starts smoothly or if the engine stalls.

   OK:

   The engine starts smoothly and does not stall.