Pinpoint Test G : P183D, P183F: Notes
Refer to Electronic Engine Controls - 3.5L GTDI for schematic and connector information.
Normal Operation and Fault Conditions
The utility police interceptor with a 3.5L GTDI engine may be equipped with an optional power transfer unit (PTU) cooling system. The PTU cooling system consists of a PTU gear oil pump, relay module, and a PTU cooler. When PTU gear oil temperature reaches 125°C (257°F) the cooling pump is activated and continues operating until the temperature decreases to 100°C (212°F). If the PTU gear oil becomes contaminated with metal shavings it may restrict or even block the PTU cooler lines, hoses or PTU cooler. Under this condition the PTU gear oil pump may appear to be operating but the gear oil may not be circulating.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P183D | Transfer Case Fluid Over Temperature | The PCM is reporting the PTU gear oil temperature has exceeded the operating temperature. |
| P183F | Driveline Cooling Pump Control Circuit | The PCM is reporting the PTU gear oil pump relay control circuit is shorted to ground or open. |
Possible Sources
- Fuses
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- PTU gear oil pump
- Restricted PTU cooler, cooler lines or hoses.
- PCM
- Relay module
Visual Inspection and Pre-Checks
Fuses