Introduced the features of the 1000 and 2000 Product Families Electronic Controls system, including closed-loop clutch control, five forward speeds, neutral, reverse, overdrive gear ratio, standard and optional design features, etc.
This manual provides troubleshooting procedures for Allison 1000 and 2000 Product Families electronic controls. It covers components like the Transmission Control Module (TCM), throttle position sensors, speed sensors, shift selectors, and NSBU switches. The guide explains how these parts interact to control transmission functions and includes wiring diagrams and component descriptions.
The manual is intended for technicians to diagnose and resolve issues with electronic control systems in transmissions, including calibration, sensor inputs, and shift timing. It includes diagrams and notes on component configurations and electrical connections.
The TCM is available in both 12V and 24V configurations to match the vehicle electrical system.
The AC voltage generated by the speed sensors varies from 150mV at low speed to 15V at high speed.
The NSBU switch disables the starter switch if a range other than Neutral or Park is selected before starting the vehicle.