Aerpro SWTO31C SWC Interface Toyota Various Models with OEM Amplifier

Aerpro SWTO31C SWC Interface Toyota Various Models with OEM Amplifier

Retain your factory steering wheel controls, OEM amplifier, USB, AUX, and reverse camera when upgrading to an aftermarket head unit in select Toyota vehicles from 2020-on with amplified OEM audio systems.

Product Overview

The SWTO31C is Aerpro's CANbus steering wheel control interface, engineered for various Toyota vehicles from 2020-on equipped with OEM amplified systems and factory reverse cameras. It allows the factory steering wheel audio control buttons to operate correctly with a compatible aftermarket head unit while simultaneously retaining the OEM amplifier, OEM AUX input, OEM USB input, and factory reverse camera functionality (excluding 360-degree cameras). The interface uses CANbus integration and requires no additional modules, connecting directly to the existing factory wiring via a vehicle-specific plug without cutting or modifying the original harness. Installation is further simplified when paired with the optional Aerpro APP8 Headunit Secondary ISO Harness, which connects between the aftermarket head unit and the SWTO31C interface.

The SWTO31C provides output feeds for reverse trigger (Purple/White wire), park brake (Green wire), and speed pulse (Pink wire), supporting a wide range of aftermarket head unit installation requirements. OEM phone button functionality is supported when connected to compatible aftermarket Bluetooth head units. Note that for amplified vehicles, fade control is not supported through this interface. The aftermarket head unit must be SWC compatible, and steering wheel control functions may vary from the original OEM button assignments.

Features & Benefits

Retains Factory Steering Wheel Controls: The SWTO31C allows the factory steering wheel audio control buttons to operate with a compatible aftermarket head unit, preserving the OEM functionality that would otherwise be lost during a head unit upgrade and improving driver safety by keeping hands on the wheel.

Retains OEM Amplifier: The OEM amplifier is retained in the signal chain, preserving factory speaker output through the existing speaker wiring. Note that fade control is not supported through this interface on amplified vehicles.

Retains OEM Reverse Camera: The factory reverse camera is retained and enabled to display on a compatible aftermarket AV head unit with an RCA camera input. 360-degree camera systems are not supported.

Retains OEM USB and AUX Inputs: Factory USB and AUX inputs (where equipped) are retained when connected to compatible aftermarket head units with matching rear USB and AUX inputs.

OEM Phone Button Support: The OEM phone button on the steering wheel is supported when the SWTO31C is connected to a compatible aftermarket Bluetooth head unit, allowing hands-free call management from the steering wheel.

CANbus Integration, No Additional Modules Required: The SWTO31C is CANbus compatible and integrates directly with the factory vehicle network without requiring additional interface modules, simplifying installation and reducing component count.

Reverse Trigger, Park Brake, and Speed Pulse Outputs: Dedicated output wires for reverse trigger (Purple/White), park brake (Green), and speed pulse (Pink) support the full range of aftermarket head unit installation requirements in one interface.

Vehicle-Specific Plug, No Wire Cutting Required: The interface is fitted with a vehicle-specific connector that plugs directly into the existing factory wiring without cutting or splicing the original harness, simplifying both installation and future removal.

Recommended for Use with Aerpro APP8 Harness: Installation is simplified when paired with the Aerpro APP8 Headunit Secondary ISO Harness (sold separately), which connects between the aftermarket head unit and the SWTO31C for a clean, integrated wiring solution.

Technical Specs

Compatible With

The SWTO31C is designed for various Toyota vehicles from 2020-on with OEM amplified systems and factory reverse cameras. Steering wheel control interfaces vary between models. Use the Aerpro Vehicle Selector at aerpro.com to confirm the correct part number for your specific Toyota model, build date, and OEM audio system before purchase.

Frequently Asked Questions

What OEM features does the SWTO31C retain when upgrading to an aftermarket head unit?

The SWTO31C retains factory steering wheel audio controls, the OEM amplifier, OEM USB input (if equipped), OEM AUX input (if equipped), and the factory reverse camera (excluding 360-degree camera systems). All retained features require connection to a compatible aftermarket head unit with the appropriate inputs and SWC compatibility. Fade control is not supported on amplified vehicles.

Does the SWTO31C support the factory phone button on the steering wheel?

Yes. The SWTO31C supports the OEM phone button on the steering wheel when connected to a compatible aftermarket Bluetooth head unit, allowing hands-free call management from the steering wheel without additional hardware.

Will the factory reverse camera work with an aftermarket head unit using the SWTO31C?

Yes, provided the aftermarket head unit has an RCA reverse camera input. The SWTO31C retains and passes through the factory reverse camera signal to a compatible aftermarket AV head unit. 360-degree camera systems are not supported by this interface.

Is the SWTO31C compatible with all Toyota vehicles from 2020-on?

The SWTO31C is designed for various Toyota vehicles from 2020-on with OEM amplified systems. Not all Toyota models use the same wiring configuration, so compatibility varies between specific models and build dates. Use the Aerpro Vehicle Selector at aerpro.com to confirm the correct interface for your specific vehicle before purchase.

Does the SWTO31C require additional CANbus modules to function?

No. The SWTO31C is CANbus compatible and integrates directly with the factory vehicle network without requiring additional interface modules. All necessary CANbus decoding is handled within the interface itself, simplifying installation.