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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 ((Totally Integrated Power Module (TIPM) - Electrical Diagnostics)) >> DTC Troubleshooting >> P127F-Fuel Pump Control Circuit 2 OVERCURRENT >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
  1. DTC IS ACTIVE 
    NOTE:

    If P0627, P0628 or P0629 has set along with this DTC, diagnose those DTC(s) first before continuing.

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

      Is the DTC Active at this time?

      Yes 

      • Go To  2

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  2. VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION 
    1. Turn the ignition off.
    2. Disconnect the TIPM C7 harness connector.
    3. Disconnect the Fuel Pump harness connector.
    4. Inspect the terminal and connector condition. Check for signs of corrosion build up or damage the would compromise the terminal to controller pin connector.
      NOTE:

      Make sure that all in-line connectors are inspected for corrosion and/or damage.

    5. Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

      Were any of the above conditions found?

      Yes 

      • Repair or replace as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Go To  3
  3. (N1) FUEL PUMP CONTROL OUTPUT CIRCUIT HIGH RESISTANCE 
    1. Using a jumper wire, connect one end to the (N1) Fuel Pump Control Output circuit in the Fuel Pump harness connector and the other to a clean chassis ground.
    2. Using a 12-volt test light connected to 12-volts, check the (N1) Fuel Pump Control Output circuit in the TIPM C7 harness connector.
      NOTE:

      The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly.

      Yes 

      • Go To  4

      No 

      • Repair the high resistance in the (N1) Fuel Pump Control Output circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  4. FUEL PUMP GROUND CIRCUIT 
    1. Using a 12-volt test light connected to 12-volts, check the (Z916) Fuel Pump Ground circuit in the Fuel Pump harness connector.
      NOTE:

      The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly.

      Yes 

      • Go To  5

      No 

      • Repair the excessive resistance in the (Z916) Fuel Pump Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  5. FUEL PUMP CONTROL OUTPUT FROM TIPM 
    1. Reconnect the TIPM C7 harness connector.
    2. Ignition on, engine not running.
    3. With the scan tool, actuate the Fuel Pump.
    4. Using the 12-volt test light connected to ground, check the (N1) Fuel Pump Control Output circuit in the Fuel Pump harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Replace the Fuel Pump in accordance with the Service Information. Refer to MODULE, FUEL PUMP, REMOVAL .
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

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