FITMENT
- 2018-2023 6.7L Ram Cummins 2500 3500 Turbo Diesel.
- Fits Ram Pickup models equipped with the factory Security Gateway Module (SGW).
- Note: Please verify your truck’s year, model, and OBD2/SGW configuration before ordering.
DESCRIPTION
Product Overview
- Implemented on 2018 and newer Ram models, FCA's Security Gateway (SGW) acts as an electronic firewall within the vehicle's controller area network (CAN). While basic read-only data remains visible at the OBD2 port, this gateway blocks unauthorized bidirectional commands, advanced adaptation routines, and ECU flash programming from aftermarket scan tools and tuners.
- Designed to restore full multiplexing capability, this SGW Bypass Harness plugs directly into the factory CAN bus distribution block to bridge around the security firewall. It opens a direct, uninhibited communication channel for compatible diagnostic and programming hardware—allowing complete system configuration, deep code clearing, and flash updates without modifying factory ECM software or cutting OEM harness wires.
Key Features
- Bridges both CAN-C and CAN-IHS networks through a single harness, providing full bidirectional access — not the partial access you’d get from single-connector bypasses
- Installs behind the driver-side dash panel with factory-style connectors — no splicing, soldering, or wire de-pinning required
- Works universally with EFILive (CSP5 tunes), EZ Lynk (tire size, remote start, vehicle parameters), MM3, AlfaOBD, and professional scan tools
- Leaves your OBD-II port fully operational for standard diagnostics, emissions checks, and code clearing while connected
- Reversible in seconds: unplug the harness and reconnect factory connectors to the SGW module to restore the stock security configuration
FAQ
Q: What exactly does the SGW block, and how does this harness fix it?
A: The factory Security Gateway Module acts as a firewall that intercepts write commands and programming requests from the OBD-II port. This harness physically routes around the SGW, establishing a direct communication path between your OBD-II port and the CAN-bus networks, so compatible tools can read and write vehicle modules without restriction.
Q: Will this trigger a check engine light or leave diagnostic codes?
A: No. The bypass harness doesn’t alter any PCM programming, sensor signals, or module configurations. It’s a purely physical bridge — no codes get set, and your truck’s systems don’t even know it’s there.
Q: Can I leave it installed permanently?
A: It can stay connected, but we recommend removing it between tuning sessions and re-plugging the factory connectors into the SGW module. This keeps your truck in its factory security configuration during normal driving and eliminates any question during dealer visits.
Q: Will this bypass work on a 2024+ Ram Cummins?
A: No. Ram significantly reworked the CAN-bus security architecture for the 2024 model year. This harness is engineered and validated specifically for 2018–2023 trucks. For newer models, a different bypass solution is required.
Q: What Seguler tuning products should I pair with this bypass? A: Once you have full ECU access through this bypass, unlock your truck’s potential with the Tuner Harness Plug Kit to protect unused connectors after emissions modifications, or pair it with a Seguler DPF/EGR delete package for a complete performance overhaul.
