Navigating the world of automotive diagnostics can be tricky, especially when dealing with older vehicles. If you’re a Jeep enthusiast, you’ve likely heard of the Renix system, a pre-OBD1 engine management system used in Jeeps before the widespread adoption of standardized OBD systems. A common question among mechanics and DIYers is whether modern OBD2 scanners, like those from Blue Point, can effectively communicate with these older Renix systems. Let’s delve into the capabilities of Blue Point OBD2 scanners and their compatibility with pre-OBD1 Renix Jeeps.
Understanding the Renix Diagnostic System
The Renix system was a pioneering engine control unit (ECU) used by AMC (American Motors Corporation) Jeeps, predating the OBD-I standard. Introduced in 1986 for the 2.5L four-cylinder engines, Renix significantly improved the drivability and power of Jeep Cherokee and Comanche models compared to their carbureted predecessors. This system was utilized until 1990, making Jeeps from the 1987-1990 era, like the Jeep Cherokee XJ, fall under the Renix umbrella.
It’s important to note that while Renix is pre-OBD1, it wasn’t entirely devoid of diagnostic capabilities. Interestingly, as highlighted in some discussions and practical demonstrations, the Renix system could offer a form of “live readout,” allowing technicians to monitor sensor data in real-time, a feature not always guaranteed in early OBD1 systems.
OBD1, OBD2, and Renix: A Timeline
To clarify Jeep’s transition through different diagnostic systems:
- REMIX: 1987-1990
- OBD1: 1991-1995
- OBD2: 1996-2001 (with 1996 being a transition year where some models might still use OBD1).
This timeline shows Renix firmly placed before the OBD standards became commonplace. The question remains: can a Blue Point OBD2 scanner, primarily designed for OBD2 and potentially OBD1 vehicles, interface with these older Renix systems?
Blue Point Scanner Compatibility with Pre-OBD1
The information available for Blue Point scanners, specifically models like the BluePoint Microscan III, suggests they are designed for OBD1 and OBD2 systems. The typical description emphasizes OBD1 compatibility when used with the correct OBD1 adapter. However, there’s less clarity on whether these scanners inherently support pre-OBD1 systems like Renix without specific adaptations or procedures.
While a Snap-On MT2500 (as demonstrated in some videos) can successfully connect to an 89 Renix Jeep and provide live data, it’s not definitively stated that a BluePoint Microscan III or similar Blue Point OBD2 scanner will offer the same pre-OBD1 support out-of-the-box.
Conclusion: Exploring Blue Point Scanners and Renix
Based on the general specifications of Blue Point OBD2 scanners, direct compatibility with pre-OBD1 Renix systems isn’t explicitly guaranteed. While Renix systems possess some diagnostic data output, whether a standard Blue Point OBD2 scanner can interpret this data, even with OBD1 adapters, requires further investigation or practical testing.
For owners of Renix Jeeps looking for diagnostic solutions using Blue Point tools, it would be prudent to:
- Consult Blue Point Scanner Documentation: Check the specific model’s manual for any mention of pre-OBD1 or Renix compatibility.
- Test with OBD1 Adapters: If using a Blue Point scanner with OBD1 adapters, attempt a connection to the Renix Jeep to see if any data can be accessed.
- Seek Expert Advice: Consult with automotive diagnostic specialists or Blue Point tool experts for definitive answers on Renix support.
While Renix systems were advanced for their time, interfacing with them using modern OBD2 tools might require specific knowledge or potentially different diagnostic equipment altogether. Understanding the limitations and capabilities of your Blue Point scanner is crucial when working with pre-OBD1 vehicles like Renix Jeeps.
