[ 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. P0193 FUEL PRESSURE SENSOR CIRCUIT HIGH INPUT
Code No. P0193: Fuel Pressure Sensor Circuit High Input
 
 
 
 
OPERATION
  • A power voltage of 5 V is applied to the fuel pressure sensor power terminal from the engine-ECU connector terminal HFP5 and earthed to the engine-ECU connector terminal HFPG from the fuel pressure sensor earth terminal.
  • The sensor signal is inputted to the engine-ECU connector terminal HFPS from the fuel pressure sensor output terminal.
 
 
FUNCTION
  • The fuel pressure sensor detects a change in fuel pressure and inputs the signal to the engine-ECU.
 
 
TROUBLE JUDGEMENT
Check Conditions
  • Ignition switch is "ON" position.
  • Battery positive voltage is more than 6 V.
Judgement Criterion
  • Normality determination voltage of fuel pressure sensor is more than 4.8 V for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • While prohibiting the operation of the injector (high pressure), carry out the control by the injector operation only.
  • Torque is restricted.
 
 
PROBABLE CAUSES
  • Failed fuel pressure sensor
  • Open circuit in fuel 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 124: Fuel pressure sensor (Absolute)
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 voltage measurement at fuel pressure sensor connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal engine-ECU HFPS line and body earth.
OK: 4.9 - 5.1 V
Is the check result normal?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check of open circuit in HFPS line between fuel 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 124: Fuel pressure sensor (Absolute)
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. Perform resistance measurement at fuel pressure sensor connector.
  • Disconnect connector, and measure at harness side.
  • Resistance between terminal engine-ECU HFPG line and body earth.
OK: Continuity (2 Ω or less)
Is the check result normal?
Go to Step 7.
Go to Step 6.
 
STEP 6. Check of open circuit, and damage in HFPG line between fuel pressure sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 7. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 124: Fuel pressure sensor (Absolute)
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 8.
 
STEP 8. Replace the delivery pipe (high pressure) (integrated with fuel pressure sensor)
  • After replacing the delivery pipe (high pressure) (integrated with fuel pressure sensor), reconfirm whether the diagnosis code is set.
Is the diagnosis code set?
Replace the engine-ECU.
Check end.