Category: Blat
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ECU Diagnostics – part 8 : Easimap uses ISOTP (sort of)
Examines Easimap CAN bus traffic and identifies ISO-TP-like message framing in the way the software talks to the Caterham MBE ECU.
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ECU Diagnostics – part 7 : ECU Maps and Mapping
Explains ECU maps and lookup tables, using Caterham MBE engine management as the context for how sensor data becomes control output.
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ECU Diagnostics – part 6 : Reading Material
Notes how The Car Hacker’s Handbook helped frame the Caterham ECU diagnostics work, especially CAN bus, ISO-TP, UDS, and request-response protocol ideas.
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ECU Diagnostics – part 5 : The Correlator Dead-end
Records an abandoned attempt to correlate Easimap data with CAN bus captures while reverse-engineering the Caterham MBE ECU protocol.
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ECU Diagnostics – part 4 : Wireshark Patching and OBD-II Results
Uses patched Wireshark decoding to inspect Caterham CAN bus captures and compare the useful diagnostic data available through OBD-II.
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ECU Diagnostics – part 3 : Test Setup
Sets up the Caterham ECU diagnostics test rig using the OBD port, Raspberry Pi, PiCAN interface, Easimap, and CAN bus capture hardware.
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ECU Diagnostics – part 2 : ECU, OBD and CAN
Explains the Caterham MBE 9A4 ECU, how it exposes diagnostic data, and how OBD and CAN bus concepts fit into the ECU diagnostics project.
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ECU Diagnostics – part 1 : Introduction
Introduction and index for the Caterham ECU diagnostics series, covering MBE ECU traffic, CAN bus, OBD-II, ISO-TP, test setup, protocol decoding, and supporting Python and Wireshark tooling.
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Visit to Millwood for Flat-floor and Stalling Problem ECU Reset
So, after over 2000 miles in the car, it was time to address one of its biggest niggles… low temperature stalling. Ever since I’d built the car it would stall at low engine temperatures. It would stall as I sat on the drive putting my harness on, it would stall at junctions for the first…
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Caterham 420R Build Tools and Trinkets
Caterham 420R build reference post covering tools, consumables, and useful trinkets from the kit-build process.