4 min read
Source: AutoTuner — October 16, 2026
AutoTuner has added 100% OBD Normal Read (NR) support for two Delphi diesel engine control units — the DCM7.1AP and DCM7.24 — opening direct on-vehicle read and write for a long list of Chinese and Asian light commercial vehicles. The update covers pickups, vans, and light trucks from Great Wall Motors, Isuzu, Foton, JAC, Dongfeng, Changan, and JMC, and it lands as these brands push aggressively into Western and emerging markets.
The shift matters because Delphi DCM7.x control units have been a bench-only proposition for most independent tuners until now. Bringing them into a clean OBD workflow removes the need to open the control unit, which changes the economics of servicing one of the fastest-growing vehicle segments on the road.
What the Delphi DCM7.1AP and DCM7.24 Support Covers
The new AutoTuner protocol targets two Delphi control units built around an Infineon TC277 TriCore microcontroller. Both are read over the diagnostic socket in OBD Normal Read mode, with read times around 2 minutes 45 seconds and write times around 3 minutes, plus automatic checksum correction on every job.
The vehicle list splits across the two ECU variants. The DCM7.1AP handles the passenger-side pickups:
- Great Wall Motors — POER, Haval, Wingle (2.0 TD, GW4D20M / GW4D20D)
- Isuzu — 100P, KV100, KV600, NKR, Taga / Taga H (3.0 TD)
- JAC — T8 Pro, T9 (2.0 CTI)
- Dongfeng — Rich, Captain (2.3 / 2.4 TD)
- Changan — Hunter F70 (2.0 TD)
- JMC — Yuhu (2.0 / 2.8 TD)
The DCM7.24 covers the larger Foton lineup — the Tunland, Toano, and View vans (2.4 TD) along with the Aumark, Forland, and Ollin trucks (4.2 and 4.3 TD). For a shop seeing a mix of these vehicles, one tool update now spans the whole intake rather than forcing bench work on every job.
Why Chinese and Asian Commercial Vehicles Are Showing Up in More Shops
Chinese LCV brands have moved well beyond their home market. GWM's POER — sold as the Cannon in several regions — and Foton's Tunland are established in Australia, Southeast Asia, the Middle East, Latin America, and parts of Africa, and they are expanding through fleet and rental channels in Europe. Isuzu's light trucks, meanwhile, have long been a global commercial staple.
That expansion creates a coverage gap. Dealer tools for these brands are often region-limited or tied to factory subscriptions, which pushes independent shops toward commercial vehicle diagnostic tools that read, calibrate, and program across makes. A multi-brand diagnostic tool is increasingly the practical answer for a workshop whose intake now includes Chinese pickups alongside the usual European and Japanese fleet.
What This Means for Independent Shops and Tuners
For tuners, the headline is simpler: diesel calibration on these vehicles no longer requires removing the ECU. OBD Normal Read means the job happens through the port, with checksums handled automatically, which removes a step that used to add hours and carry real risk of damaging the board. That brings Chinese and Asian diesel work closer to the plug-in workflow shops already run on European diesels.
It also sits inside a broader ECU tuning shift. As more of the global light-truck fleet moves to Chinese platforms, the shops that can read and calibrate Delphi DCM7.x units are the ones that keep the work. A software update that adds this coverage is effectively a market-entry ticket for a segment most independent shops could not touch before.
A word of caution: any calibration or tuning work must stay within local emissions and vehicle regulations. OBD read/write capability is a repair and performance tool, not a license to defeat emissions systems.
What's Next for Asian Diesel Coverage
AutoTuner's move is unlikely to be the last. As GWM, Foton, JAC, and Dongfeng deepen their overseas footprint, expect competing platforms to follow with their own DCM7.x and similar Asian-diesel protocols. The early movers win the install base; the laggards play catch-up on a segment that is growing faster than the European passenger-car market.
For independent shops, the practical takeaway is to check whether their current tooling covers the Chinese and Asian commercial vehicles already in their area, and to treat DCM7.1AP and DCM7.24 support as a signal of where the market is heading rather than a one-off update.
Written by James Mitchell, Senior Technical Editor at vxdas.com
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