Lincoln Corsair Manuals

Lincoln Corsair: Transmission Cooling - Automatic Transmission – HF45 / Diagnosis and Testing - Transmission Cooling

Principles of Operation

Inspection and Verification

  1. Verify the customer concern by operating the vehicle to duplicate the condition.
  1. If the inspection reveals an obvious concern(s) that can be readily identified, repair as necessary.
  1. Install new components if a transmission fluid leak is found in any of the transmission cooling components.
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart


Symptom Action
  • Transmission overheating
  GO to Pinpoint Test A

Pinpoint Tests


PINPOINT TEST A: TRANSMISSION OVERHEATING

Normal Operation and Fault Conditions

  • Plugged or damaged transmission fluid cooler or transmission fluid cooler tubes
    • Inspect the transmission fluid cooler and the transmission fluid cooler tubes for damage or plugging. INSTALL new components as necessary.REFER to: Transmission Fluid Cooler Tubes - Plug-In Hybrid Electric Vehicle (PHEV) (307-02B Transmission Cooling - Automatic Transmission – HF45, Removal and Installation).
  • Active grille shutter stuck in closed position
    • Resolve any faults with the active grille shutter. REFER to: Active Grille Shutter (501-02 Front End Body Panels, Diagnosis and Testing).
  • System leaks
    • Inspect transmission fluid cooler and transmission fluid cooler tubes for leaks. SERVICE as required.
  • Internal transmission concerns
    • Inspect the transmission fluid pump and filter assembly. REFER to: Transmission - Plug-In Hybrid Electric Vehicle (PHEV) (307-01B Automatic Transmission - Automatic Transmission – HF45, Disassembly).
    • Inspect internal transmission components for indications of overheating. REFER to: Transmission - Plug-In Hybrid Electric Vehicle (PHEV) (307-01B Automatic Transmission - Automatic Transmission – HF45, Disassembly).
      REFER to: Transmission Case Cover (307-01B Automatic Transmission - Automatic Transmission – HF45, Removal and Installation).

Possible Sources

  • Damaged transmission cooler or cooler tubes
  • Inoperative active grille shutter
  • Transmission fluid leak
  • Internal transmission components
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

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