DTC P1255
Diagnostic InstructionsDTC Descriptor
DTC P1255

Fuel Pump Control Module Driver High Temperature

Circuit/System Description

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

Component

Description

K111 Fuel Pump Driver Control Module

The control module k111 supplies the fuel pump with a 3-phase voltage in order to achieve the desired pump speed required for building fuel line pressure.

When the ignition is turned On, the ECM sends a 12 V signal to the control module K111 to enable the fuel pump. If the engine is not started, the control module K111 turns the fuel pump Off after 6 s.

Conditions for Running the DTC
  • Engine=CrankingorRunning
  • Fuel Pump Enable Command=On
  • Ignition Voltage=Greater than 9 V

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

Conditions for Setting the DTC

K111 Fuel Pump Driver Control Module=Warmer than 160°C (320°F)—For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor category=Type B DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category=Type B DTC

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information ReferenceDTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification
  1. Ignition » On / Vehicle » In Service Mode
  2. Verify DTC P1029 or P102A-P102C is not set
    • If none of the DTCs are set
  3. Verify the component location is free of debris, clutter or any obstruction that may reduce airflow which could cause an overheat condition:K111 Fuel Pump Driver Control Module
    • If a condition exists
    1. Repair as necessary
    2. Perform the following action:Clear the DTCs.
    3. Test drive the vehicle.
    4. Verify DTC P1255 is not set
      • If the DTC sets » Replace the component:K111 Fuel Pump Driver Control Module
      • If the DTC is not set
    5. All OK.
    • If no condition exists
  4. Perform the following action:Clear the DTCs.
  5. Test drive the vehicle.
  6. Verify DTC P1255 is not set
    • If the DTC is set

      Replace the component:K111 Fuel Pump Driver Control Module

    • If the DTC is not set
  7. All OK.
Repair Instructions

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

For control module replacement, programming, and setup refer to:Control Module References