IWE System

The IWE system consists of the following:

The IWE system electronically actuates a clutch ring to engage or disengage the front wheel hubs to or from the front half shafts.

When a shift is requested from 4WD to 2WD or from 2WD to 4WD, the TCCM commands the IWE s to increment a wave gear that converts rotation into axial travel, moving the clutch ring in and out of engagement.

The IWE does not "default" to a specific position. If they are not commanded, they will remain in whatever position they were (engaged or disengaged).

The TCCM has a startup strategy that affects IWE operation after the initial key cycle:

• When ambient temperature is below 32 F (0 C), The IWE s engage after the initial key cycle and a driving gear is selected. The IWE s stay engaged regardless of a 4x4 mode change for approximately 2 miles (3km). Once the set distance has been achieved, the IWE s disengage (if the vehicle is in 2WD (2H)). Distance traveled resets only if the temperature is below the threshold and another key cycle occurs or if the customer shifts to Park (P) and back to a driving gear within the same key cycle. The TCCM uses this strategy to warm up the front axle in cold temperatures to improve driveline synchronization.