Before Programming Procedure

Ensure following conditions are met before programming a control module:

• Vehicle system voltage, there are no charging system concerns.
• Battery voltage is greater than 12 volts but less than 16 volts. Battery must be charged before programming control module if battery voltage is low.
• Ensure a battery charger is not connected to vehicle's battery. Incorrect system voltage or voltage fluctuations from a battery charger, may cause programming failure or control module damage.
• Turn OFF or disable any system that may put a load on vehicle's battery. Twilight sentinel, Interior lights, Daytime running lights (DRL), disables DRL system, by applying parking brake. Turn off HVAC systems and blower motors. Engine cooling fans etc.
• Follow programming procedure. Ensure ignition switch is in proper position. Scan tool prompts you to turn ON ignition, with engine off . DO NOT change position of ignition switch during programming procedure, unless instructed to do so.
• Ensure all tool harness connections are secure. DO NOT disturb tool harnesses while programming. If an interruption occurs during programming procedure, programming failure or control module damage may occur.