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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 970 (6.7L Diesel - DTCS P0008 To P0304 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P027B-Fuel Pump Module 2 Control Circuit Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. OTHER DTCS PRESENT 
    NOTE:

    If P0464, P2066, P2633, P2634, or P2636 DTCs are present, perform the Diagnostics for those DTCs before continuing with this one.

    1. Ignition on, engine not running.
    2. With the scan tool, select View DTCs.

      Are any of the DTCs listed above present at this time?

      Yes 

      • Perform the Diagnostics for those DTCs before continuing with this one.

      No 

      • Go To  2
  2. CHECK FOR FUEL LEAKS 
    1. Turn the ignition off.
    2. With the scan tool, navigate to the BCM and PCM to activate the Primary (Main) and Auxiliary (Secondary) Lift Pumps.
    3. Visually inspect the transfer hose between the Auxiliary (Secondary) Fuel Tank and the Primary (Main) Fuel Tank for leaks.

      Were any leaks found?

      Yes 

      No 

      • Go To  3
  3. CHECK THE PRIMARY (MAIN) FUEL LEVEL SENDING UNIT 
    1. Turn the ignition off.
    2. Disconnect the Primary (Main) Fuel Tank Assembly in-line harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read DTCs.

      Does the scan tool display DTC: P0460-15-FUEL LEVEL SENSOR 1 - CIRCUIT SHORT TO BATTERY OR OPEN with the connector unplugged?

      Yes 

      • Check the Primary (Main) Fuel Tank Assembly harness for any signs of damage which could cause an open or shorted circuit. If the harness checks good, replace the Primary (Main) Fuel Tank Level Sending Unit in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (N4) FUEL LEVEL SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the BCM C5/E harness connector.
    3. Check for continuity between ground and the (N4) Fuel Level Sensor Signal circuit at the Primary (Main) Fuel Tank Assembly in-line harness connector.

      Is there continuity between ground and the (N4) Fuel Level Sensor Signal circuit?

      Yes 

      • Repair the (N4) Fuel Level Sensor Signal circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (N4) FUEL LEVEL SENSOR SIGNAL CIRCUIT FOR A SHORT TO THE (G109) FUEL LEVEL SENSE RETURN CIRCUIT 
    1. Check for continuity between the (G109) Fuel Level Sense Return circuit and the (N4) Fuel Level Sensor Signal circuit at the Primary (Main) Fuel Tank Assembly in-line harness connector.

      Is there continuity between the (N4) Fuel Level Sensor Signal circuit and the (G109) Fuel Level Sense Return circuit?

      Yes 

      • Repair the short between the (G109) Fuel Level Sense Return circuit and the (N4) Fuel Level Sensor Signal circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  6
  6. BODY CONTROL MODULE (BCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors at the Fuel Tank Assembly in-line, Fuel Pump Module and the BCM.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Fuel Pump Module and the BCM harness connectors.
    4. Perform any Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Go To  7
  7. POWER DISTRIBUTION CENTER 
    1. Turn the ignition off.
    2. Replace the Power Distribution Center in accordance with the Service Information.
    3. Turn the ignition on.
    4. With the scan tool, erase PCM DTCs.
    5. Perform several ignition key cycles leaving the ignition on for at least 10 seconds per cycle.
    6. Start the engine and let it run for two minutes.
    7. With the scan tool, read PCM DTCs.

      Does the scan tool display this DTC?

      Yes 

      • Go To  8

      No 

  8. POWERTRAIN CONTROL MODULE 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Freeze Frame and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read PCM DTCs.

      Did the DTC return?

      Yes 

      No 

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