DBWX2 controller

What is drive by wire?

Drive by wire throttle control is a technique that all modern engines use. Driver does not directly control the throttle butterlfy opening in a drive by wire enabled engine. Instead the ECU will decide how much the throttle butterfly will be opened depending on programming.

That sounds dangerous. Is it safe?

DBWX2 controller has dual processors onboard that monitor the pedal and throttlebody. If a fault is detected throttle buttefly will power off and close. Also the controller unit has an output that can be used to shut down engine. An argument could be made that a correcly installed dbw system is safer than conventional cable throttle where you are in for the ride if the throttle cable gets stuck.

Can I use my old accelerator pedal?

It depends. It is possible to use a "cable throttle DBW potentiometer". This is essentially a redundant potentiometer mounted on a cable throttle system found in some hondas and PSA cars. The accelerator pedal and the DBW throttlebody both use redundant feedback signaling. There are two sensors in the pedal and throttlebody. This allows the controller match the position signals and determine error conditions.

Does this work with my Megasquirt ECU?

Yes! but only if you have a MegaSquirt3 or MS3 based ecu. DBWX2 controller will connect to these ecu's via CAN-bus.

I see a mention of boost actuator control. Does this controller work as boost controller also?

DBWX2 does not have a actual boost controller. Instead the electronic boost actuator control works by mapping the actuator position to the boost dutycycle CAN-bus message received from the ECU. So you use the ECU's boost controller as usual, and the DBWX2 will look for the CAN messages to control the electronic boost actuator position.

See examples

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