Need a hand? Email us. We read every message. Your car (year, model, engine), your macOS version, and a screenshot help a lot.
Email support@clarke.rocksKLine Diag is in testing through Apple’s TestFlight. On your Mac, install the free TestFlight app, then open the KLine Diag beta link and click Accept and Install. If the link says the beta is full or not open yet, email us.
No cable yet? The app has a demo mode: open it and click Try Demo to explore every screen with sample data.
Plug the cable into the car’s OBD port and your Mac, then turn the ignition on. The engine can be running or off.
Open KLine Diag. It wakes each control module in turn (these cars use a deliberately slow 5-baud wake-up), reads the identification, fault codes and measuring blocks, and then refreshes about every 30 seconds while the window is open.
Each code shows the manufacturer’s number, the matching OBD-II P-code when there is one, a description, the fault type, and whether it’s stored or intermittent. Click a code to see the measuring blocks linked to it. Some manufacturer-specific codes don’t have a description yet; tell us the code and we’ll add one.
Click Log Blocks… to choose what to record, Start Logging to record, and Export Log to save a CSV you can open in Numbers or Excel.
Click Clear Codes and choose the module. Clear codes only after a repair, with the car parked. Clearing also resets emission-readiness monitors, so you may need to drive a while before an emissions test will pass.
In the menu bar, choose Bot Connection…, enter the address and token of the MCP server you use, and switch it on. The assistant can then read the same codes and live data you see. It can’t clear codes unless you also turn on Allow the bot to clear fault codes. See the privacy policy for what is shared.