Auto-Cruise Control System Diagnostic Trouble Codes

The auto-cruise control system consists of the engine control module (ECM) < M/T > or powertrain control module (PCM) < A/T >, control switches and sensors. The control switches and sensors monitor the state of the vehicle. The ECM < M/T > or PCM < A/T > controls the throttle valve opening angle in the throttle body in accordance with the input signals from the switches and sensors. If the PCM detects a malfunction on any of those components, the ECM < M/T > or PCM < A/T > estimates where the problem may be occurring, and will set a diagnostic trouble code. Diagnostic trouble codes cover the auto-cruise control switch, stoplight switch and ECM < M/T > or PCM < A/T >.