The DRB-II scan tool, a predecessor to the DRB-III, was a vital diagnostic tool for Chrysler vehicles. While the DRB-III is more common today, understanding the DRB-II’s history and functionality can provide valuable context for automotive technicians. This article delves into available resources for the DRB-II, including manuals and quick reference guides.
Understanding the DRB-II Scan Tool and its Documentation
A comparison between a 4/87 and a revised 7/89 version of the “DRB-II Operators Manual” reveals interesting differences. The earlier edition is approximately 10 pages longer, offering more detailed explanations of basic procedures, such as power-up sequences, indicator lights, and audible signals. This information is omitted in the revised manual, likely due to cost-saving measures and the assumption of user familiarity.
The original manual also includes specific procedures for both carbureted and fuel-injected engines, providing a more comprehensive understanding of the DRB-II’s capabilities. While not containing a cable pin-out diagram, the earlier manual complements the later version with its in-depth foundational knowledge.
Beyond the manuals, other valuable resources exist for the DRB-II. Quick reference cards from the 83-88 period offer concise menu descriptions, aiding in navigation. A 1992 Master Tech Reference guide provides a comprehensive list of abbreviations used on the DRB-II display, clarifying their meanings beyond the definitions found in service guides. This suggests that Master Tech likely conducted training or produced documentation specifically for the DRB-II.
Further research indicates the existence of articles detailing data collection and logging with the DRB-II. Unfortunately, locating these articles has proven challenging, with only vague references found in unrelated materials. The Microsoft MDS shop computer, co-developed with Chrysler, seems to hold a wealth of information. Beyond serving as a DOS-based browser for technical service bulletins on CD-ROM, some versions may have supported Windows 95 before becoming obsolete.
The Transition to DRB-III and OBD-II
The introduction of the OBD-II standard in 1996 marked a significant shift in automotive diagnostics. While a patented adapter allowed the DRB-II to function with OBD-II connectors, the DRB-III emerged as its successor, replacing both the DRB-II and the MDS shop computer. The DRB-III utilized PC cards with EEPROM memory, replacing proprietary cartridges. However, with current eBay prices around $5,000 and limited backward compatibility for pre-1996 vehicles, the DRB-II retains historical significance and practical value for enthusiasts and technicians working on older Chrysler vehicles. The DRB II scan tool manual, along with these supplementary resources, provides valuable insight into a pivotal era in automotive diagnostics.
