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Some green modules after 1998 can communicate with the tool on a J1587 link. All black modules should be able to use a CAN link.

Here is enough to be dangerous. See how this goes, I may be able to send you the full spec. Command: ECUs on Data Link Display: MID & SAE J1587 MID Description for user selection Global Request: 172 / 000 / 243 / CS Specific Request: 172 / 128 / 243 / MID / CS Response: MID/243/n/MID/b / b...

Yes, you can send the request message to the ECU and decode the response. The response will contain the current mode and fault codes active and historical.

The DDT Software will send a request to the ECU, The ECU will not broadcast anything until it sees this request. So if you have a combox connected with a bus active light, and nothing else on the bus the light will not show traffic until you start the DDT software then you will see the traffic...

Both ECUs listed above have 1708 and CAN communication capability. The original green ECU has no com capability and all the unused pins are internally traced to ground and could damage you com box. The DDT tool is pretty reliable over the J1708 connection. The ECU software may not broadcast on...

The ECU part number will be very important as the older ECU's do not have com software imbeded. I will make sure the newer ECU have the com active in the software.

What is the ECU Part number?676422 and 676603 are the two possible choices that will communicate with a laptop. Not sure if the 422 has the CAN chip but 603 does for sure. What COM box are you using to connect? and is the box powered up properly. When using a USB com box sometimes I have to try...

What is the ECU Part number?676422 and 676603 are the two possible choices that will communicate with a laptop. Not sure if the 422 has the CAN chip but 603 does for sure. What COM box are you using to connect? and is the box powered up properly. When using a USB com box sometimes I have to try...