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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - DTCS B1810-00 To P0111-00 >> DTC Troubleshooting >> P0002-00-Fuel Volume Regulator "A" Control Circuit Performance >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR ANY SERVICE BULLETINS OR PCM SOFTWARE UPDATES 
    1. Check for any applicable Service Bulletins or Flash updates related to the DTC.

      Are there any applicable Service Bulletins or Flash updates?

      Yes 

      No 

      • Go To  2
  2. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  3

      No 

  3. CHECK THE HIGH PRESSURE FUEL SYSTEM FOR A SIGNS OF A LEAK 
    NOTE:

    Do not run the engine when inspecting the high pressure fuel system for leaks. The system pressure can be extremely high.

    1. Visually inspect for signs of fuel leaks at the high pressure fuel tube and Fuel Injectors.

      Are any leaks present?

      Yes 

      • If the leak appears to be at the high pressure fuel tube, verify that the tube is torqued correctly. If the torque is correct, replace the high pressure fuel tube in accordance with the Service Information. If the leak appears to be at a Fuel Injector, replace the Fuel Injector or seal in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE FUEL RAIL PRESSURE SENSOR READING 
    1. Start the engine and allow it to idle.
      NOTE:

      Typically the desired fuel rail pressure should be at of above approximately 2000 kpa (600 psi) at idle.

    2. With the scan tool, monitor the desired and actual fuel rail pressure reading.

      Is the desired and actual fuel rail pressure value reading above 4137 kpa (290 psi)?

      Yes 

      No 

      • Go To  5
  5. CHECK THE LOW FUEL PRESSURE SYSTEM FOR PROPER OPERATION 
    1. Perform the CHECKING THE LOW PRESSURE FUEL SYSTEM test procedure. Refer to CHECKING THE LOW PRESSURE FUEL DELIVERY SYSTEM ..

      Were any issues found with the low pressure system?

      Yes 

      No 

      • Go To  6
  6. CHECK FOR HIGH RESISTANCE IN THE (K366) FUEL QUANTITY SOLENOID 12 VOLT SUPPLY CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Fuel Quantity Solenoid harness connector.
    3. Disconnect the PCM C2 harness connector.
    4. Measure the resistance of the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit between the PCM C2 harness connector and the Fuel Quantity Solenoid harness connector.

      Is the resistance below 1.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK FOR HIGH RESISTANCE IN THE (K365) FUEL QUANTITY CONTROL CIRCUIT 
    1. Measure the resistance of the (K365) Fuel Quantity Control circuit between the PCM C2 harness connector and the Fuel Quantity Solenoid harness connector.

      Is the resistance below 1.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (K365) Fuel Quantity Control circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. CHECK FOR HIGH RESISTANCE IN THE (F851) 5-VOLT SUPPLY CIRCUIT 
    1. Disconnect the Fuel Rail Pressure (FRP) Sensor harness connector.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (F851) 5-Volt Supply circuit between the FRP Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  9

      No 

      • Repair the high resistance in the (F851) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  9. CHECK FOR HIGH RESISTANCE IN THE (K917) SENSOR GROUND CIRCUIT 
    1. Measure the resistance of the (K917) Sensor Ground circuit between the FRP Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  10

      No 

      • Repair the high resistance in the (K917) Sensor Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  10. CHECK FOR HIGH RESISTANCE IN THE (K179) FUEL RAIL PRESSURE SIGNAL 1 CIRCUIT 
    1. Measure the resistance of the (K179) Fuel Rail Pressure Signal 1 circuit between the FRP Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  11

      No 

      • Repair the high resistance in the (K179) Fuel Rail Pressure Signal 1 circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  11. CHECK FOR HIGH RESISTANCE IN THE (K162) FUEL RAIL PRESSURE SIGNAL 2 CIRCUIT 
    1. Measure the resistance of the (K162) Fuel Rail Pressure Signal 2 circuit between the FRP Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  12

      No 

      • Repair the high resistance in the (K162) Fuel Rail Pressure Signal 2 circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  12. REPLACE THE FUEL RAIL PRESSURE SENSOR AND RETEST FOR DTC 
    1. Replace the Fuel Rail Pressure Sensor in accordance with the Service Information.
    2. Connect the FRP Sensor and PCM C2 harness connectors.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs
    5. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    6. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • Replacing the Fuel Rail Pressure Sensor repaired the fault.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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