Electronic Control Module (ECM) & Cruise Control Module

The ECM/cruise control module interprets the position of the servo, mode control switches and output of the Vehicle Speed Sensor (VSS). In response to these inputs, the module signals the opening or closing of the vent and vacuum solenoid valves in the servo. To determine whether cruise control is controlled by an ECM or cruise control module, see appropriate wiring diagram in WIRING DIAGRAM section.