The OS-2CTS is a plug and play interface that allow the installation of an aftermarket radio into Cadillac CTS and SRX vehicles. It will maintain operation of the On Starо and factory amplified audio system. On Starо audio will play through the front speakers when active. It also retains all warning chimes and Vehicle Rear Parking Assist chimes.
• Class II circuitry will not disable vehicle data bus even if interface loses power.
• On Starо active LED and Ignition on LED.
• Provides +12v switched accessory output. No more searching for switched +12v in fuse box or kick panel.
• Mute output to either mute the aftermarket radio or to turn if off when On Starо is active.
• On Starо Volume control via factory steering wheel audio controls or click wheel .
• New radio will operate with the vehicle RAP (Retained Accessory Power) system, which is 10 minutes or until a door is opened.

Note:
1. The OS-2CTS does not retain the factory XM receiver, you will lose this option when the factory radio is replaced with an aftermarket radio.
2. You may use this interface even if the vehicle does not have On Starо but need the interface with the factory amplifier.
3. On Starо must be enabled using the On Starо button on the rear view mirror, steering wheel On Starо button will not enable On Starо.
4. On Starо volume is not adjustable on CTS-V and SRX models, volume is preset at medium level.
5. The Cadillac SRX with Factory Navigation Radios do not use the same connectors as supplied.

Testing and Verifying Operation
1. Turn ignition on. The green ignition on LED inside of the interface will turn on and the +12v accessory wire will turn on.
2. Turn on the radio and check the balance. Note: Audio will not fade as the rear outputs of aftermarket radio can not be used.
3. Pressing the On Starо button on the mirror will mute or turn off the radio and allow the audio to be heard from the speakers. The On Starо active red LED will also turn on. When On Starо disconnects, the radio will un-mute or turn back on and the On Starо LED will turn off. On Starо audio level can be adjusted using the volume controls on the steering wheel (Volume level is preset for CTS-V and SRX vehicles).
4. Turn off vehicle and remove key. RAP will be active and keep the radio on for 10 minutes or until a door is opened.
5. The green ignition on LED and radio will turn off when RAP turns off or door is opened.

source

Related Tags: 2cts, accessory power, aftermarket radio, cadillac cts, cadillac srx, chimes, circuitry, click wheel, factory radio, fuse box, kick panel, medium level, new radio, plug and play, radio 2, rear view mirror, steering wheel, turn on the radio, vehicle data bus, volume control