Product Datasheet/Brochure

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PAC-audio.com
Pacific Accessory Corporation
Page 1
Rev. 122017
Lexus / Toyota Amp PRO
Retention of SOS
(Safety Connect / Lexus Enform)
Technical Bulletin
Overview:
Safety Connect (SOS) is a subscription based service provided for select Lexus / Toyota models. Verify
the vehicle is equipped with Safety Connect / Lexus Enform (there will be an SOS button in the overhead
console) and that it is an active account, and that retention of SOS is a concern prior to proceeding.
In Toyota / Lexus vehicles equipped with Safety Connect / Lexus Enform and a digital amplier, the front
right output of the factory amplier (sometimes tweeter, sometimes door woofer, sometimes both) goes
through the factory SOS telematics module. This telematics module is what creates the audio for the SOS
system (Voice Prompts, etc). There is an analog mute wire that runs from the SOS module to the factory
amp, and when the SOS is triggered by the user, the SOS module sends a ground signal on this wire to
mute the audio coming from the factory amplier. When this happens, the audio to the SOS speaker (or
speakers) is muted and the SOS module internally switches the front right speaker to now pass audio from
the telematics module, instead of the amplier.
APPS
CAR
AUDIO
^
SEEK
TRACK
SETUP
PWR VOL
TUNE SCROLL
I
I
^
Safety
Connect
Module
Amp Inputs
Safety Connect Inputs
Rear Left Outputs
Front Left
Speakers
Front Right
Speakers
Rear Right
Speakers
Rear Left
Speakers
Front Right Outputs to Safety Connect
Front Left Outputs
Rear Right Outputs
Front Right Outputs to Speakers
SOS
Safety Connect
Button in Overhead Console
SOS Mute Trigger
Factory Amplifier
Example of Factory JBL system with SOS