Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
1. Attempt to start the engine. If the engine will not start, crank the engine for five seconds.
  WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
2. Using the scan tool, read the active DTCs.
  Does the scan tool display P0629-FUEL PUMP CONTROL CIRCUIT HIGH?
  
  Yes
  - Go to step 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Fuel Pump Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Totally Integrated Power Module (TIPM) C2 harness connector.
3. Disconnect the Powertrain Control Module (PCM) C1 harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (K31) Fuel Pump Control circuit in the Totally Integrated Power Module (TIPM) harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (K31) Fuel Pump Control circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
(K31) FUEL PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 2: Checking Fuel Pump Control Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K31) Fuel Pump Control circuit between the Totally Integrated Power Module (TIPM) harness connector and the Powertrain Control Module (PCM) C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the open or high resistance in the (K31) Fuel Pump Control circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
TOTALLY INTEGRATED POWER MODULE (TIPM)
1. Connect the Powertrain Control Module (PCM) C1 harness connector.
2. Connect a jumper wire between ground and the (K31) Fuel Pump Control circuit in the Totally Integrated Power Module (TIPM) harness connector.
3. Turn the ignition on.
4. Using the scan tool, read the active DTCs.
  Does the scan tool display P0628-FUEL PUMP CONTROL CIRCUIT LOW?
  
  Yes
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 5
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Totally Integrated Power Module (TIPM) and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .