Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
INSPECTION PROCEDURE
CHECK DTC OUTPUT (RELATED TO ENGINE)
READ VALUE OF INTELLIGENT TESTER (INJECTION VOLUME AND INJECTION FEED BACK VAL #1 TO #4)
CHECK EXHAUST GAS
CHECK AIR INTAKE SYSTEM AND EXHAUST SYSTEM
CHECK TURBOCHARGING PRESSURE
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
CHECK CYLINDER COMPRESSION PRESSURE
CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - EDU)
PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CONTROL THE CYLINDER FUEL CUT)
READ VALUE OF INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)
READ VALUE OF INTELLIGENT TESTER (MANIFOLD ABSOLUTE PRESSURE)
CHECK IDLE SPEED
READ VALUE OF INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION)
READ VALUE OF INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)
READ VALUE OF INTELLIGENT TESTER (FUEL PRESSURE)
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)
INSPECT CRANKSHAFT POSITION SENSOR
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)
INSPECT INTAKE AIR TEMPERATURE SENSOR
INSPECT COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)
CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)
REPLACE ECM
ECD SYSTEM - Black Smoke Emitted
INSPECTION PROCEDURE
After replacing the ECM, the new ECM needs registration and initialization .
After replacing a supply pump, the ECM needs initialization .
After replacing a injector, the ECM needs registration .
- 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 to be normal when the Data List outputs standard values. There may be concealed factors of the malfunction.
| 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 the DTCs.
- Result:
| Display (DTC Output) | Proceed to |
| No output | A |
| DTCs related to the engine | B |
- If the exhaust gas contains excessive black smoke, perform the following operations:
Accelerate the engine speed to the maximum rpm with no load 20 times.
Check the volume of black smoke in the exhaust gas.
- Result:
| Result | Proceed to |
| Black smoke is not present | OK |
| Black smoke remains in the exhaust gas | NG |
- Soot deposits in the exhaust system may cause excessive black smoke.
| 7.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)
| 11.READ VALUE OF INTELLIGENT TESTER (MANIFOLD ABSOLUTE PRESSURE) |
Connect an intelligent tester to the DLC3.
Turn the engine switch ON (IG) and turn the tester on.
Select the following menu items: Powertrain / Engine and ECT / Data List / Map and Atmosphere Pressure.
Read the value displayed on the tester.
- OK:
- MAP:
- Same as atmospheric pressure.
- 1 bar of atmospheric pressure is 101 kPa.
Apply negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) to the manifold absolute pressure sensor.
- OK:
- MAP:
- MAP decreases 40 kPa from atmospheric pressure.
Apply positive pressure of 69 kPa (518 mmHg, 20.4 in.Hg) to the manifold absolute pressure sensor.
- OK:
- MAP:
- MAP increases 69 kPa from atmospheric pressure.
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
| 13.READ VALUE OF INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION) |
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 / Accel Position 1 and Accele Position 2.
Read the value.
- Standard voltage:
| Accelerator Pedal Condition | Specified Condition |
| Released | 0.6 to 1.0 V |
| Depressed | 3.4 to 3.8 V |
| Released | 1.4 to 1.8 V |
| Depressed | 4.2 to 4.6 V |
| 14.READ VALUE OF INTELLIGENT TESTER (INTAKE AIR TEMPERATURE) |
Connect the intelligent tester to DLC3.
Turn the engine switch ON (IG) and turn the tester ON.
Enter the following menus: Powertrain / Engine / Data List / Intake Air.
Read the value.
- Standard:
- Same value as the actual air temperature.
| 15.READ VALUE OF INTELLIGENT TESTER (FUEL PRESSURE) |
Connect the intelligent tester to the DLC3.
Start the engine and turn the intelligent tester ON.
Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
Read the values.
- OK:
- The internal fuel pressure of the common rail is within the specification below.
| Engine Speed | Fuel Pressure |
| Idling | Approximately 37 to 43 MPa |
| 3,000 rpm (No engine load) | Approximately 60 to 66 MPa |
| 16.INSPECT ENGINE COOLANT TEMPERATURE 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 |
- When checking the ECT sensor in water, keep the terminals dry. After the check, wipe the sensor dry.
- 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 |
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| OK | |
| |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 17.CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM) |
Disconnect the E67 sensor connector.
Disconnect the E59 ECM connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
| Tester Connection | Specified Condition |
| PIM (E67-2) - PIM (E59-117) | Below 1 Ω |
| VC (E67-3) - VCPM (E59-71) | Below 1 Ω |
| E (E67-1) - EPIM (E59-94) | Below 1 Ω |
| PIM (E67-2) or PIM (E59-117) - Body ground | 10 kΩ or higher |
| VC (E67-3) or VCPM (E59-71) - Body ground | 10 kΩ or higher |
| E (E67-1) or EPIM (E59-94) - Body ground | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR |
|
| 18.INSPECT CRANKSHAFT POSITION SENSOR |
Disconnect the E81 sensor connector.
Measure the resistance of the sensor.
- Standard resistance:
| Tester Connection | Condition | Specified Condition |
| 1 - 2 | Cold | 835 to 1,400 Ω |
| 1 - 2 | Hot | 1,060 to 1,645 Ω |
- 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 |
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|
| OK | |
| |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 19.CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) |
Disconnect the A26 sensor connector.
Disconnect the A49 ECM connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
| Tester Connection | Specified Condition |
| VCP2 (A26-1) - VCP2 (A49-56) | Below 1 Ω |
| EPA2 (A26-2) - EPA2 (A49-58) | Below 1 Ω |
| VPA2 (A26-3) - VPA2 (A49-54) | Below 1 Ω |
| VCPA (A26-4) - VCPA (A49-55) | Below 1 Ω |
| EPA (A26-5) - EPA (A49-57) | Below 1 Ω |
| VPA (A26-6) - VPA (A49-53) | Below 1 Ω |
| VCP2 (A26-1) or VCP2 (A49-56) - Body ground | 10 kΩ or higher |
| EPA2 (A26-2) or EPA2 (A49-58) - Body ground | 10 kΩ or higher |
| VPA2 (A26-3) or VPA2 (A49-54) - Body ground | 10 kΩ or higher |
| VCPA (A26-4) or VCPA (A49-55) - Body ground | 10 kΩ or higher |
| EPA (A26-5) or EPA (A49-57) - Body ground | 10 kΩ or higher |
| VPA (A26-6) or VPA (A49-53) - Body ground | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE ACCELERATOR PEDAL ROD ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR) |
|
| 20.INSPECT INTAKE AIR TEMPERATURE SENSOR |
Measure the resistance of the sensor.
- Standard resistance:
| Tester Connection | Condition | Specified Condition |
| 1 - 2 | 20°C (68°F) | 2.21 to 2.69 kΩ |
- When checking the sensor in water, keep the terminals dry. After the check, wipe the sensor dry.
| | REPLACE INTAKE AIR TEMPERATURE SENSOR |
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|
| OK | |
| |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 21.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) - VC2 (E65-1) | 3 kΩ or less |
Reconnect the fuel pressure sensor connector.
| | REPLACE COMMON RAIL ASSEMBLY |
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| 22.CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM) |
Disconnect the E59 ECM connector.
Disconnect the E65 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 |
Reconnect the ECM connector.
Reconnect the fuel pressure sensor connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Replace the ECM.
- After replacing the ECM, the new ECM needs registration and initialization .
Check the volume of black smoke in the exhaust gas.
- OK:
- Black smoke is not present.
| | REPLACE SUPPLY PUMP ASSEMBLY |
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