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.

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.CHECK DTC OUTPUT (RELATED TO ENGINE)

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG) and turn the intelligent tester ON.

Enter the following menus: Powertrain / Engine / DTC.

Read DTCs.

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

Go to step 7

Go to step 8

A

6.CHECK PRE-HEATING SYSTEM (GLOW INDICATOR LIGHTING TIME AND AFTER GLOW TIME)

Check the lighting duration of the glow indicator light .

OK:
Indicator lighting time is normal.

Go to step 13

OK

8.CHECK AIR INTAKE SYSTEM AND EXHAUST SYSTEM

Inspect the engine condition .

Go to step 14

OK

10.CHECK CYLINDER COMPRESSION PRESSURE

Check the cylinder compression pressure .

Standard:
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)

Go to step 18

OK

15.CHECK IDLE SPEED

Connect the intelligent tester to DLC3.

Turn the engine switch ON (IG) and turn the intelligent tester ON.

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

Read the value.

Standard:
Idling:
750 to 1,200 rpm

Go to step 19

OK

16.CHECK HARNESS AND CONNECTOR (STARTER RELAY - ECM)

Ecd System - Engine Difficult To Start Or Stalling. 2AD-FHV ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Disconnect the A49 ECM connector.

Remove the ST relay from the engine room J/B and R/B No. 1.

Measure the resistance of the wire harness side connectors.

Standard resistance:
Tester Connection Specified Condition
R/B ST relay terminal 1 - STA (A49-43) Below 1 Ω
R/B ST relay terminal 1 or STA (A49-43) - Body ground 10 kΩ or higher

Go to step 20

REPLACE ECM

18.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Remove the sensor.

Measure the resistance of the sensor.

Standard resistance:
Connection Specified Condition
20°C (68°F) 2.32 to 2.59 kΩ
80°C (176°F) 0.310 to 0.326 kΩ

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.

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

19.INSPECT CRANKSHAFT POSITION SENSOR

Disconnect the E81 sensor connector.

Measure the resistance between terminals 1 and 2.

Standard resistance:
Tester Connection Condition Specified Condition
1 - 2 Cold 835 to 1,400 Ω
1 - 2 Hot 1,060 to 1,645 Ω

NOTICE:

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).

REPLACE CRANKSHAFT POSITION SENSOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

20.INSPECT COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)

Disconnect the E65 fuel sensor connector.

Measure the resistance between each terminal of the fuel pressure sensor connector.

Standard resistance:
Tester Connection Specified Condition
PR (E65-5) - E2 (E65-4) 16.4 kΩ or less
PR2 (E65-2) - E2S (E65-3) 16.4 kΩ or less
PR (E65-5) - VC (E65-6) 3 kΩ or less
PR2 (E65-2) - VCS (E65-1) 3 kΩ or less

Reconnect the fuel pressure sensor connector.

REPLACE COMMON RAIL ASSEMBLY

OK

21.CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)

Disconnect the E59 ECM connector.

Disconnect the F65 fuel pressure sensor connector.

Check the resistance between the wire harness side connectors.

Standard resistance (Check for open):

Tester Connection	Specified Condition
PCR1 (E59-67) - PR (E65-5)	Below 1 Ω
PCR2 (E59-114) - PR2 (E65-2)	Below 1 Ω
VCS (E59-68) - VCS (E65-1)	Below 1 Ω
VCM (E59-69) - VC (E65-6)	Below 1 Ω
E2M (E59-91) - E2 (E65-4)	Below 1 Ω
E2S (E59-66) - E2S (E65-3)	Below 1 Ω

Standard resistance (Check for short):

Tester Connection	Specified Condition
PCR1 (E59-67) or PR (E65-5) - Body ground	10 kΩ or higher
PCR2 (E59-114) or PR2 (E65-2) - Body ground	10 kΩ or higher
VCS (E59-68) or VCS (E65-1) - Body ground	10 kΩ or higher
VCM (E59-69) or VC (E65-6) - Body ground	10 kΩ or higher
E2M (E59-91) or E2 (E65-4) - Body ground	10 kΩ or higher
E2S (E59-66) or E2S (E65-3) - Body ground	10 kΩ or higher