Additional Wiring
WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
For complete wiring diagrams, refer to:
SYSTEM WIRING DIAGRAMS for 300.
SYSTEM WIRING DIAGRAMS for Charger.
SYSTEM WIRING DIAGRAMS for Magnum.
The Transmission Control Module (TCM) constantly calculates the transmission ratio based on the input speed sensor 1 and 2 (N2-N3) signals and the calculated output shaft speed. The intent of this diagnostic is to detect if the transmission is slipping or an invalid gear ratio is present.