DTC P0236 / P0237 / P0238
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detection condition | Trouble area |
|---|---|
|
P0236: Turbocharger / Supercharger Boost Sensor “A” Circuit Range / Performance Measured voltage of boost pressure sensor signal circuit is higher than specified value. (1 D/C detection logic) |
•Boost pressure sensor and/or its circuit
•Turbocharger actuator and/or its circuit •Air intake circuit •Barometric pressure sensor (in ECM) •ECM |
|
P0237: Turbocharger / Supercharger Boost Sensor “A” Circuit Low Any of the following conditions is met.
•Measured voltage of boost pressure sensor signal circuit is lower than specified value. (1 D/C detection logic)•Measured boost pressure is far below targeted boost pressure for specified time. |
|
|
P0238: Turbocharger / Supercharger Boost Sensor “A” Circuit High Measured boost pressure is far above targeted boost pressure for specified time. (1 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A3: | Boost pressure sensor ground circuit | 2. | Boost pressure sensor |
| A1: | Boost pressure sensor power supply circuit | B1: | IAT sensor-2 signal circuit | 3. | IAT sensor-2 |
| A2: | Boost pressure sensor signal circuit | 1. | ECM |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
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| 2 |
Boost pressure sensor power supply circuit and ground circuit check
1)When ignition is “OFF”, disconnect connector of boost pressure sensor with IAT sensor-2.
2)Check for proper terminal connection to connector of boost pressure sensor with IAT sensor-2.
3)If connections are OK, set ignition “ON”.
4)Check that voltage between “A1” and “A3” circuits is approx. 5 V.
Is check result OK?
|
Go to Step 5.
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Go to Step 3.
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| 3 |
Boost pressure sensor ground circuit check
1)Check that voltage between “A1” circuit and ground is approx. 5 V.
Is check result OK?
|
Repair “A3” circuit.
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Go to Step 4.
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| 4 |
Boost pressure sensor power supply circuit check
1)When ignition is “OFF”, disconnect “D01” connector from ECM.
2)Check for proper terminal connection to “D01” connector.
3)If connections are OK, check the following points.
•Resistance of “A1” circuit: less than 1 Ω
•Resistance between “A1” circuit and ground: infinity •Resistance between “A1” circuit terminal and other terminal at connector of boost pressure sensor with IAT sensor-2: infinity •Voltage of “A1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 5.
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Repair or replace defective wire harness.
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| 5 |
Boost pressure sensor signal circuit check
1)When ignition is “OFF”, disconnect “D01” connector from ECM.
2)Check for proper terminal connection to “D01” connector.
3)If connections are OK, check the following points.
•Resistance of “A2” circuit: less than 1 Ω
•Resistance between “A2” circuit and ground: infinity •Resistance between “A2” circuit terminal and other terminal at boost pressure sensor with IAT sensor-2 connector: infinity •Voltage of “A2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 6.
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Repair or replace defective wire harness.
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| 6 |
Boost pressure sensor check
1)Check boost pressure sensor.
Is check result OK?
|
Go to Step 7.
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Replace boost pressure sensor with IAT sensor-2.
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| 7 |
Turbocharger actuator operation check
1)Check turbocharger actuator.
Is check result OK?
|
Go to Step 5.
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Repair or replace defective part(s).
|
| 8 |
Air intake / turbocharger circuit check
1) Check that air intake / turbocharger circuit is working properly.
Is check result OK?
|
Go to Step 6.
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Repair or replace defective part(s).
|
| 9 |
Inlet throttle valve operation check
1)Check inlet throttle valve operation.
Is check result OK?
|
Replace ECM and recheck DTC.
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Repair or replace defective part(s).
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