Radio Replacement and
Steering Wheel Control Interface
for Toyota / Lexus / Scion Vehicles
RP4.2-TY11
Interface Connectors
Plug Interface Connectors 1, 2 and 4 into the appropriate port on the RP4.2-TY11 interface (using the diagram on page 1 or
the label on the bottom of the RP4.2-TY11 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 RP4.2-TY11.
Vehicle Connectors
Depending on the application, the RP4.2-TY11 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 typical combinations needed for most vehicles.
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
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
