[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P0238 BOOST PRESSURE SENSOR CIRCUIT HIGH INPUT
Code No. P0238: Boost Pressure Sensor Circuit High Input
 
 
 
 
OPERATION
  • A power voltage of 5 V is applied to the boost pressure sensor power terminal from the engine-ECU connector terminal UPS5 and earthed to the engine-ECU connector terminal E from the boost pressure sensor earth terminal.
  • The sensor signal is inputted to the engine-ECU connector terminal UPS from the boost pressure sensor output terminal.
 
 
FUNCTION
  • The boost pressure sensor detects a change in supercharging pressure and inputs the signal to the engine-ECU.
 
 
TROUBLE JUDGEMENT
Check Conditions
  • More than 2 seconds have passed since the engine starting sequence was completed.
  • Engine coolant temperature sensor is normal.
Judgement Criterion
  • Boost pressure sensor output voltage is 4.6 V or more for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Supercharging pressure is restricted.
 
 
PROBABLE CAUSES
  • Failed boost pressure sensor
  • Open circuit or harness damage in boost pressure sensor circuit or loose connector contact
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 125: Boost pressure sensor 1
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.
 
STEP 2. Perform resistance measurement at boost pressure sensor connector.
  • Disconnect connector, and measure at harness side.
  • Resistance between terminal engine-ECU E line and body earth.
OK: Continuity (2 Ω or less)
Is the check result normal?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check of open circuit, and damage in E line between boost pressure sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 125: Boost pressure sensor 1
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU.
 
STEP 5. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 125: Boost pressure sensor 1
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 6.
 
STEP 6. Replace the boost pressure sensor
  • After replacing the boost pressure sensor, reconfirm whether the diagnosis code is set.
Is the diagnosis code set?
Replace the engine-ECU.
Check end.