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DTC P1702: Transmission Control Module (Ram): Description
WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The TCM controls the A/T.
Courtesy of NISSAN MOTOR CO., U.S.A.