2H Operation

2H turns on when you select 2H, NORMAL or ECO. Power is delivered 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 4x4 Switch Module sends a 2H mode status to the TCCM via HS2 CAN (4x4_SW = 2H).
The TCCM provides a ground for the IWE solenoid (IWE_OUT_ENGAGED # = No).
The TCCM outputs a 0% duty cycle to the clutch field coil (4WD_CLUTCH_OUTPUT # = 0.00%).
2H will momentarily be displayed in the message center at key up and after a 4A to 2H shift.

NOTE: When shifting to 2H mode in order for the IWEs to completely disengage the vehicle steering wheel must be less than 90 deg and 5 seconds have elapsed since the shift to 2H has been initiated.