What is FlexRay™?
FlexRay™ is a high-speed communication protocol used in vehicles and aircraft. It's designed to be reliable, fault-tolerant, and efficient. Its used in safety-critical applications, advanced driver assistance systems, power train, body control modules, battery management systems, and more. Over the past decade, vehicle manufacturers have transitioned away from CANBUS on modern vehicles for many in-vehicle control systems and REV2 Controller has followed that trend.

What is DirectPWM?
bootmod3 CustomROM V2 software update implements DirectPWM to re-purpose an existing DME pin output and uses it to send a PWM signal directly through the OEM factory vehicle harness to a REV2 input. REV2 in turn replicates that PWM signal to one of its outputs. With no communication protocol overhead involved, DirectPWM provides for the absolute fastest, most direct control of a REV2 connected output.

Which outputs can use DirectPWM, and how is this configured?
Sequential Port Injection and Boost Control Solenoid (MAC valve) are configurable with DirectPWM trigger control. Tuners and end users simply toggle it on the bootmod3 Map Configuration screen and store it on the DME. Integration is seamless and no configuration/updates are required to the REV2 Controller.

Once my REV2 is installed in the vehicle, do I need to connect it for any tuning like with some standalone ECUs?
No. You simply install the REV2 and forget about it :) All your tuning is still done on the DME using the bootmod3 Map Editor.

How do I update firmware on the REV2?
Although firmware updates are a very rare occurrence since REV2 contains no state or tuning data, for the odd occasion we may have a firmware bug, REV2 Controller integrates WiFi. Any firmware updates would be done simply through the bootmod3 app like with our bootmod3 WiFi Adapter.

Long question, geeks only! :) FlexRay™ has options for communicating using a dynamic and a static segment. Static segment is much harder to implement and its the one that ensures message delivery making it highly desirable over a lossy/broadcast type protocol such as CANBUS that which ensure message delivery. Tell me you implemented support FlexRay's static segment?
You bet we did! DME CustomROM V2 and REV2 utilize the static segment on FlexRay to guarantee message delivery for output control communications.

Does REV2 Controller implement an Ethanol Content Analyzer and send ethanol content and fuel temperature to the DME?
REV2 provides a digital input on its harness for an Ethanol Sensor. However, unlike with our bootmod3 Flex Fuel Kit Controller, REV2 does not do any ethanol content analysis in its firmware. As with all sensors connected to REV2 inputs, REV2 also sends raw frequency/PWM data from the ethanol sensor to the DME without any processing of it in the firmware. DME then analyzes that raw sensor data and converts it into ethanol content and fuel temperature.

Does REV2 a built in MAP sensor, or have an input for a MAP sensor?
REV2 doesn't have a built-in MAP sensor or an input for an aftermarket MAP sensor. Instead, we provide a separate plug'n'play harness which connects an aftermarket MAP sensor directly to the OEM vehicle harness. Aftermarket MAP sensor is then calibrated in custom tables stored on the DME.

Does REV2 and bootmod3 CustomROM V2 provide any safeties for connected inputs and outputs?
REV2 simply relays connected sensor data to the DME. bootmod3 CustomROM V2 functionality on the DME takes in that data to provide a tuner to configure over 40 custom trouble codes for various integrated safeties such as:

• Ignition Coil Cut Safety, per cylinder
• Direct Injector Cut Safety, per cylinder
• Port Fuel Injector Cut Safety, per cylinder
• Coolant Over-Pressure Safety (e.g. due to a leaking head gasket)
• Fuel Pressure Safety
• Various engine status safeties for: Cam Sync, Board Status, FlexRay connectivity
• Over-boost Safety for Boost Control PID
• Knock Safety based on Ignition Timing Corrections, per cylinder
• Custom Load and Torque Limiter Safeties
• Various Nitrous Safeties such as
  • Bottle under/over pressure
  • Lean run timer
  • Pre/Post spray timer with Ignition Timing and Lambda Target compensations
• Methanol / Water Tank Level Safety

Do I need bootmod3 or CustomROM to use the REV2 Controller on my car?
REV2 Controller is not a standalone ECU and as such does not have any calibration table data. All tuning and features are done on the DME. DME must be running the bootmod3 CustomROM V2 software update to use the REV2 Controller on your vehicle.

Do I need to re-send my DME to Femto for unlock again if I already unlocked it before?
If your vehicle's DME required a Femto unlock and you've already done it, unfortunately due to how Femto's unlock works, you'll have to re-send it for Femto to load the bootmod3 CustomROM V2 update on your DME. Those re-sending DMEs for updates get adjusted lower pricing, but for all DME unlock details get in touch with Femto.

My vehicle's DME doesn't require a Femto unlock. I can directly and fully flash it over OBD or after a bench unlock. Can I just flash the required bootmod3 CustomROM V2 map from my tuner on the DME?

Yes, flash away!