Diagnosis And Testing - Speed Control System

The Powertrain Control Module (PCM) continuously monitors all of the speed control system electrical circuits to determine the system readiness. If the PCM detects a monitored system fault, it sets and stores a Diagnostic Trouble Code (DTC). The PCM uses On-Board Diagnostics (OBD) and communicates with other electronic modules using the CAN Bus.

If the PCM detects a fault within any of the following systems, the cruise control system will be disabled and the PCM will store an appropriate DTC.

• Vehicle Speed Sensor
• Sensor or actuators of the electric throttle
• Accelerator Pedal Position (APP) Sensor
• Brake Pedal Position
• Engine Load sensor
• Ignition Coils
• Fuel Injectors
• Turbo sensors or actuators

Repair any concerns with performance before attempting to diagnose and repair the speed control system.