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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 424 (5.7L - DTCS B1810 To P0204 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P018D-Fuel Pressure Sensor Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    NOTE:

    If there are any 5-Volt supply DTCs present, repair those DTCs before proceeding.

    1. Turn the ignition on.
    2. With the scan tool, read DTCs.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K181) FRPS SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the FRPS harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (K181) FRPS Signal circuit at the FRPS harness connector.

      Is the reading above 5.2 volts?

      Yes 

      • Repair the (K181) FRPS Signal circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK THE (K181) FRPS SIGNAL CIRCUIT FOR A SHORT TO THE (F856) 5-VOLT SUPPLY CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect both PCM C1 and C2 harness connectors.
    3. Measure the resistance between the (K181) FRPS Signal circuit and the (F856) 5-Volt Supply circuit at the FRPS harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short between the (K181) FRPS Signal circuit and the (F856) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (K181) FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (K181) FRPS Signal circuit between the FRPS harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (K181) FRPS Signal circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (K914) FUEL RAIL PRESSURE SENSOR GROUND FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (K914) FRPS Ground circuit between the FRPS harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (K914) Sensor Ground circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. CHECK THE FUEL RAIL PRESSURE SENSOR 
    1. Turn the ignition off.
    2. Reconnect both PCM C1 and C2 harness connectors.
    3. Reconnect the FRPS harness connector.
    4. Turn the ignition on.
    5. With the scan tool, erase DTCs.
    6. While monitoring scan tool, connect a jumper between the (K181) FRPS Signal circuit and the (K914) Sensor Ground circuit at the FRPS harness connector.

      Does the DTC P018B set?

      Yes 

      • Replace the Fuel Rail Pressure Sensor in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace and program the Powertrain Control Module in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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