System Function
WARNING: This page is about a different car, the 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
Feature inputs:
- brake ON/OFF switch
- Mode Select Switch (MSS)
- digital Transmission Range (TR) sensor
- vehicle speed signal transmitted from the Powertrain Control Module (PCM)
- contact plate position inputs A, B, C, D
Feature outputs:
- 4WD LOW indicator (ground when activated, open circuit when deactivated)
- 4WD indicator (ground when activated, open circuit when deactivated)
- 4WD shift motor outputs
Shifts between 2WD and 4WD HIGH can be made at any speed. Listed below are the inputs and outputs needed by the 4WD control module to execute a change between any of these modes.
Feature inputs:
- vehicle speed signal
- mode select switch
Feature outputs:
- 4WD cluster indicator (ground when activated, open circuit when deactivated)
When shifting into or out of LOW range, the 4WD control module requires that the vehicle speed is less than 5 km/h (3 MPH), the brake is applied, and the transmission is in NEUTRAL.
Feature inputs:
- mode select switch
- contact plate position inputs A, B, C, D
- vehicle speed signal
- brake ON/OFF switch input (battery voltage when brake is depressed, open circuit when not activated)
- digital TR sensor (ground when transmission is in NEUTRAL, open circuit otherwise)
Feature outputs:
- 4WD shift motor outputs
- 4WD LOW cluster indicator (ground when activated, open circuit when deactivated)