Radio Replacement and
Steering Wheel Control Interface
for Toyota / Lexus / Scion Vehicles
TY1A-RS
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Pacific Accessory Corporation
Page 2
Rev: V4
Date:090519
Interface Connectors
Plug Interface Connectors 1, 2 and 4 into the appropriate port on the TY1A-RS interface (using the diagram on page 1 or the
label on the bottom of the TY1A-RS interface). The Connector 3 connection will be dependent upon whether or not the vehicle
has a factory amplified system. Connect to the appropriate port on the TY1A-RS.
Vehicle Connectors
Depending on the application, the
TY1A-RS will need 2 or 3 of the 5
vehicle connectors. The additional
connectors will be left unused on
the harness. Any additional radio
harnesses in the vehicle that do
not plug into one of the vehicle
connectors shown above, will not
be used. Below you will find the
combinations needed for most
vehicles.
Interface Connector 1
Interface Connector 2
Interface Connector 4
Interface Connector 3
Vehicle Connector 1
Vehicle Connector 2
Vehicle Connector 3 Vehicle Connector 4
Vehicle Connector 5
Combination 1
Typical 2004 to 2013 NON-AMPLIFIED
Vehicle Connector 3 Vehicle Connector 4 Vehicle Connector 5
Combination 2
Typical 2004 to 2013 AMPLIFIED
Vehicle Connector 1
Vehicle Connector 3
Combination 3
Typical 2014 to 2017 AMPLIFIED AND NON-AMPLIFIED
Vehicle Connector 2
Vehicle Connector 4 Vehicle Connector 5
Combination 4
Non-Typical 2012 to 2014 AMPLIFIED
Vehicle Connector 2
Vehicle Connector 1
*OBD-2 V3
*The OBD-2 V3 harness provides
CAN bus from the vehicle to the
TY1A-RS for select vehicles
that do not already provide CAN
bus to the radio.
Only use the
OBD-2 V3 if
the aftermarket radio
requires connections for Vehicle
Speed Sense, Parking Brake, or
Reverse Signal
for the following
applications:
1. Combination 1 from below.
2. Combination 2 from below.