DIY Exp: Tips on how to Add HS/MS CAN Switch by way of ELM327 Modification

Numerous Ford and Mazda models (around since 2003-2004) are equipped with MS CAN bus, while MS CAN bus just isn't supported by ELM327 Bluetooth OBD2, for the reason that MS CAN is usually a manufacturer-specific answer and situated on non-OBD2 pins.

Even so, ELM327 is quite versatile tool, and slight modification permits to implement the MS CAN support So Let us come to "How to modify ELM327 to be able to add the HS/MS Can switch" as follows:

ELM327 Bluetooth supports HS CAN in the stock, simply because Ford HS CAN absolutely matches to the OBD2 standards. It occupies pins six and 14. MS CAN bus occupies pins 3 and 11. The picture under illustrates the thing.

The simplest strategy to implement the MS CAN support would be to add a switch that may shift amongst MS / HS CAN The scheme under explains the modification.:

Roadmap:
1. Obtain a 6 pin mini-switch of ON-ON variety (as an example, MTS-202-A2) in any shop that sells electronic elements, also prepare a wire.

2. Disassemble ELM327 (very carefully take away the label that hides four screws, unscrew them).
3. Find a location for mini-switch (most complex a part of the whole operation for some devices which might be really compact).
4. Unsolder wires from pins 6 and 14 on the OBD2 jack and solder them to the 2 middle pins of the mini-switch.
5. Solder two new wires from 2 outer mini-switch pins to pins 6 and 14 of the OBD2 jack.
6. Solder two other new wires from two other outer mini-switch pins to pins three and 11 on the OBD2 jack.
7. Verify the work (it truly is pretty vital to complete not mix CAN-L and CAN-H wires up) and assembly the ELM327, mark the MS and HS can position around the device box to prevent confusion