Circuit/System Description

The ignition mode switch has two LED's that indicate the vehicle power mode. When the vehicle is in the off mode, both LED's will be off. Pressing the ignition mode switch button once (without the brake pedal applied), the vehicle enters the accessory mode and the amber LED (ACCESSORY) will illuminate. The accessory mode has a 5 min timeout to reduce battery drain. With the ignition OFF, pressing and holding the push button start switch for at least 10 s will place the vehicle in run/start mode (without the vehicle running) and the green LED (RUN/START) will illuminate. With the ignition OFF (with the brake pedal applied), pressing the ignition mode switch button once, the vehicle will enter run/start mode and the green LED (RUN/START) will illuminate. This will start the engine. With the engine running and while the vehicle is in P (Park), pressing the ignition mode switch once will turn the ignition OFF. If the vehicle is not in Park, the ignition will return to ACCESSORY and display the message SHIFT TO PARK in the Driver Information Center. When the vehicle is shifted into Park, the ignition system will then switch to OFF. Both LED's have the voltage supplied from the body control module (BCM). The ignition mode switch sends the ignition mode switch status to the keyless entry control module and to the BCM. The keyless entry control module sends a redundant signal to the BCM with the ignition mode switch status.