System Function

Feature inputs:

• key in RUN or START position
• brake ON/OFF switch
• mode select switch (MSS)
• digital transmission range (TR) sensor (automatic transmission)
• clutch pedal position (CPP) sensor (manual transmission)
• 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 HIGH 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:

• contact plate position inputs A, B, C, D
• mode select switch

Feature outputs:

• 4WD shift motor outputs
• 4WD HIGH 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 (MSS)
• contact plate position inputs A, B, C, D
• vehicle speed signal
• brake ON/OFF switch input (battery voltage when brake is pressed, open circuit otherwise)
• digital transmission range (TR) sensor (ground when transmission is in NEUTRAL, open circuit otherwise)
• clutch pedal position (CPP) sensor (ground when pressed, open circuit otherwise)

Feature outputs:

• 4WD shift motor outputs
• 4WD LOW cluster indicator (ground when activated, open circuit when deactivated)