2H Operation

2H Mode delivers power to the to the rear wheels only. This mode is appropriate for normal on-road driving on dry pavement and provides the best fuel economy. Torque is passed through the transfer case to the rear drive shaft at a 1:1 ratio. In 2H:

• The ATCM sends a 4L mode status on the HS-CAN2 via the GWM to the TCCM on the FD-CAN (4x4_SW = 4WD_LOW).
• The TCCM outputs a 0% duty cycle to the clutch field coil (4WD_CLUTCH_OUTPUT # = 0.00%).
• The shift motor is in the full CCW position. Refer to TRANSFER CASE SHIFT MOTOR STATUS  for further information.
• 2H will momentarily be displayed in the message center at key up and after a 4A to 2H shift.