Test G: Vehicle Has No or Inadequate Torque at Rear Wheels

Pinpoint Test G: Vehicle Has No Or Inadequate Torque At Rear Wheels

Normal Operation
The on-demand 4WD system uses data from other systems as inputs to the 4WD control module. The 4WD control module uses the inputs to determine the appropriate duty cycle to send to the active torque coupling that delivers the desired torque to the rear wheels. If the 4WD control module loses communication with, or receives invalid data from any of the necessary modules, DTCs are set and the 4WD control module may not allow 4WD operation.

G1-G3:

G4-G6:

G6-G7:

G8-G10:

NOTE: Conduct Steps 1 through 7 outlined in Inspection and Verification prior to performing this test.

Possible Causes
^ Tire/axle out of range
^ Active torque coupling
^ 4WD control module
^ Circuit 57 open
^ Circuit 704 (DG/LG) open
^ Circuit 779 (BN) open or short to ground
^ Circuit 778 (OG) open or short to ground
^ Circuit 1003 (GY/YE) open