• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

For an overview of the component/system, refer to:Fuel System Description

• KR73 Ignition Main Relay=On
• Fuel Pump Speed=0 RPM

Frequency the DTC runs=Continuously—After the running conditions are met

Fuel Pump Phase U-V-W Circuits=Open—For greater than 1 s

Fuel Pump Phase U-V-W Circuits=Short to Ground—For greater than 1 s

Fuel Pump Phase U-V-W Circuits=Short to Voltage—For greater than 1 s

DTCs listed in the DTC Descriptor category=Type A DTC

DTCs listed in the DTC Descriptor category=Type A DTC

Engine Controls Schematics

Master Electrical Component List

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Control Module References

1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC U18A2 is not set
• If the DTC is set

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• If the DTC is not set
3. Verify the scan tool parameter:
• Fuel Pump Phase U-V-W Circuits High Voltage Test Status=OKorNot Run
• Fuel Pump Phase U-V-W Circuits Low Voltage Test Status=OKorNot Run
• Fuel Pump Phase U-V-W Circuits Open Test Status=OKorNot Run
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

   Verify the DTC does not set.

• If the DTC sets

  Refer to: Circuit/System Testing

• If the DTC is not set
5. All OK.

1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector:K111 Fuel Pump Driver Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:
• Control circuit terminal 8&Ground
• Control circuit terminal 9&Ground
• Control circuit terminal 24&Ground
• If 1 V or greater

  Repair the short to voltage on the circuit.

• If less than 1 V
5. Ignition/Vehicle & All vehicle systems » Off
6. Test for infinite resistance between the test points:
• Control circuit terminal 8&Ground
• Control circuit terminal 9&Ground
• Control circuit terminal 24&Ground
• If less than infinite resistance

  Repair the short to ground on the circuit.

• If infinite resistance
7. Disconnect the electrical connector:A7 Fuel Pump and Level Sensor Assembly
8. Test for less than 2 Ω between the test points:
• Control circuit terminal 8@K111 Fuel Pump Driver Control Module&Control circuit terminal 1@A7 Fuel Pump and Level Sensor Assembly
• Control circuit terminal 9@K111 Fuel Pump Driver Control Module&Control circuit terminal 2@A7 Fuel Pump and Level Sensor Assembly
• Control circuit terminal 24@K111 Fuel Pump Driver Control Module&Control circuit terminal 3@A7 Fuel Pump and Level Sensor Assembly
• If 2 Ω or greater

  Repair the open/high resistance in the circuit.

• If less than 2 Ω
9. Replace the component:A7 Fuel Pump and Level Sensor Assembly
10. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

• If the DTC sets

  Replace the component:K111 Fuel Pump Driver Control Module

• If the DTC does not set
11. All OK.

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

• Fuel Tank Fuel Pump Module Replacement—A7 Fuel Pump and Level Sensor Assembly
• For control module replacement, programming, and setup refer to:Control Module References