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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 >> P127C-Fuel Pump Control Circuit 2 Low >> 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, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2

      No 

      • Perform the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  2. FUEL PUMP MODULE 
    1. Turn the ignition off.
    2. Disconnect the Fuel Pump Module harness connector.
    3. Ignition on, engine not running.
    4. Using the scan tool under the TIPM Actuators, actuate the Fuel Pump.
    5. With a 12-volt test light connected to ground, probe the (N1) Fuel Pump Control Output circuit at the Fuel Pump Module 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 and flash on and off?

      Yes 

      • Replace the Fuel Pump Module in accordance with the Service Information.
      • Perform the PCM VERIFICATION Test. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Go To  3
  3. (N1) FUEL PUMP CONTROL OUTPUT CIRCUIT SHORTED TO GROUND 
    1. Turn the ignition off
    2. Disconnect the TIPM C7 harness connector.
    3. Measure the resistance between ground and the (N1) Fuel Pump Control Output circuit at the TIPM C7 harness connector.

      Is the resistance below 100 ohms?

      Yes 

      • Repair the short to ground in the (N1) Fuel Pump Control Output circuit.
      • Perform the PCM VERIFICATION Test. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Go To  4
  4. TOTALLY INTEGRATED POWER MODULE 
    NOTE:

    Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    1. Using the schematics as a guide, inspect the wire harness and connectors.
    2. Pay particular attention to all Power and Ground circuits.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Perform the PCM VERIFICATION Test. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Replace the Totally Integrated Power Module in accordance with the Service Information.
      • Perform the PCM VERIFICATION Test. Refer to the appropriate Testing & Diagnostics article in Engine Performance .