Hi,
Not a problem. Here is what I have. Note that the TIPM (totally integrated power module) is one of the things mentioned. They are known for bad connections due to corrosion. Keep that in the back of your mind.
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Here are the diagnostics. The attached pics correlate with the directions.
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2007 Dodge or Ram Truck RAM 1500 Truck 2WD V6-3.7L VIN K
Gas
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection P Code Charts P0627 Gas
GAS
P0627-FUEL PUMP CONTROL CIRCUIT
pic 1
For complete wiring diagrams refer to Diagrams/Electrical.
- When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts and the ASD sense switch is on.
- Set Condition:
Actual Fuel Pump state is not equal to desired state. One Trip Fault. Three good trips to turn off the MIL.
Pic 2
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1. FUEL PUMP OPERATION
Ignition on, engine not running.
With a scan tool in the PCM, actuate the Fuel Pump.
Is the Fuel Pump operating?
Yes
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Computers and Control Systems > Component Tests and General Diagnostics > Intermittent Condition
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
No
- Go To 2
2. (K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO VOLTAGE
pic 3
Stop the Fuel Pump actuation.
Turn the ignition off.
Disconnect the C3 PCM harness connector.
Ignition on, engine not running.
Measure the voltage on the (K31) Fuel Pump Control circuit at the C1 TIPM harness connector.
Does the voltmeter indicate voltage present?
Yes
- Repair the short to voltage in the (K31) Fuel Pump Control circuit.
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
No
- Go To 3
3. (K31) FUEL PUMP CONTROL CIRCUIT OPEN
pic 4
Turn the ignition off.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
Measure the resistance of the (K31) Fuel Pump Control circuit from the C1 TIPM harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes
- Go To 4
No
- Repair the open in the (K31) Fuel Pump Control circuit.
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
4. (K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO GROUND
pic 5
Measure the resistance between ground and the (K31) Fuel Pump Control circuit in the TIPM C1 harness connector.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground in the (K31) Fuel Pump Control circuit.
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
No
- Go To 5
5. FUEL PUMP CONTROL OPERATION FROM THE PCM
pic 6
Turn the ignition off.
Connect the C3 PCM harness connector.
Ignition on, engine not running.
Using the scan tool in the PCM, actuate the Fuel Pump.
With a 12-volt test light connected to ground, probe the (K31) Fuel Pump Control circuit in the TIPM C1 harness connector.
Does the test light illuminate brightly and flash on an off?
Yes
-
NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
If OK, replace the TIPM.
No
- Go To 6
6. PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Were there any problems found?
Yes
- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
No
- Replace and program the Powertrain Control Module.
- Perform POWERTRAIN VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Powertrain Verification Test
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I hope this helps. If you run into trouble on the trip, let me know.
Take care,
Joe
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Saturday, October 17th, 2020 AT 10:44 PM