Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR
CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)
CHECK TERMINAL VOLTAGE (VC TERMINAL OF MANIFOLD ABSOLUTE PRESSURE SENSOR)
INSPECT TURBOCHARGER SUB-ASSEMBLY
DTC P0105 Manifold Absolute Pressure / Barometric Pressure Circuit
DTC P0107 Manifold Absolute Pressure / Barometric Pressure Circuit Low Input
DTC P0108 Manifold Absolute Pressure / Barometric Pressure Circuit High Input
DESCRIPTION
The manifold absolute pressure sensor detects the intake manifold pressure by using its built-in sensor unit. The ECM determines the basic injection duration and injection advance timing based on the voltage output by the manifold absolute pressure sensor.
The manifold absolute pressure sensor monitors the absolute pressure inside the intake manifold (default is 0 kPa (0 mmHg, 0 in.Hg)). As a result, the ECM controls the air-fuel ratio at the proper level under any driving conditions, and fuel control accuracy is not influenced by fluctuations in the atmospheric pressure due to factors such as high altitude, etc.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0105 P0107 P0108 |
Open or short in manifold absolute pressure sensor circuit for 0.8 seconds or more (1 trip detection logic) |
Open or short in manifold absolute pressure sensor circuit Manifold absolute pressure sensor Turbocharger assembly EGR valve assembly ECM |
- HINT:
- When DTC P0105, P0107, or P0108 is detected, check the intake manifold pressure by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / MAP.
| Intake Manifold Pressure | Malfunction |
| Approximately 0 kPa | Short in PIM circuit |
| 250 kPa (1,875 mmHg, 73.8 in.Hg) or more | Open or short in VC circuit Open in PIM circuit Open in E2 circuit |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration and initialization .
- HINT:
- If DTCs relating to different systems are output, and they share terminal E2 as their ground, check this ground circuit first.
| 1.CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR |
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.
- HINT:
- 1 bar of atmospheric pressure is 101 kPa.
Apply a 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 a 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.
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| NG | |
| 2.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
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| OK | ||
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| 3.CHECK TERMINAL VOLTAGE (VC TERMINAL OF MANIFOLD ABSOLUTE PRESSURE SENSOR) |
Disconnect the manifold absolute pressure sensor.
Turn the engine switch ON (IG).
Measure the voltage.
- Standard voltage:
Tester Connection Specified Condition VC (E67-3) - E (E67-1) 4.5 to 5.5 V
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| OK | |
| 4.INSPECT TURBOCHARGER SUB-ASSEMBLY |
Check the turbocharger sub-assembly .
- OK:
- None of the inspection results show any abnormalities.
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| OK | |
| 5.INSPECT EGR VALVE ASSEMBLY |
Check the EGR valve assembly .
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| OK | ||
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