Tag: OBD
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Lowflying Article – If Only Caterhams Could Talk, June/July 2020
Background post for the Lowflying article that adapted the Caterham ECU diagnostics work into a broader explanation of CAN bus and MBE diagnostic data.
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ECU Diagnostics – part 13.3 : MBE-ISOTP
Describes the MBE ISO-TP style protocol used by Easimap to request data from the Caterham ECU and turn the responses into useful diagnostics.
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ECU Diagnostics – part 13.2 : OBD-II
Summarises what standard OBD-II services and PID data the Caterham MBE 9A4 ECU supports and how that data appears on the CAN bus.
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ECU Diagnostics – part 13 : Three Diagnostic Protocols in the MBE 9A4 ECU
Introduces the three diagnostic protocols found on the Caterham MBE 9A4 ECU: MBE-Broadcast, OBD-II, and the MBE ISO-TP protocol used by Easimap.
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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 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.