Other information:
Removal
NOTE:
Removal steps in this procedure may contain installation details.
NOTE:
This step is only necessary if the TRM (trailer module) is being replaced.
Using a diagnostic scan tool, begin the PMI process for the TRM following the on-screen instructions.
Refer to: Module Configuration - System Operation and Component
Description (418-01 Module Configuration, Description ..
System Operation
Principles of Operation
Power Transfer Unit (PTU) Operation
The PTU has four (4) modes of operation: Connected, Connecting,
Disconnected, and Disconnecting. Each mode is commanded by the AWD
module. The power transfer unit contains a reversible DC
motor and two hall effect position sensors. The motor moves the shift
fork which connects or disconnects the dog clut..