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This article is part of an archived collection from Nikolay Shishkov's blog about first-generation electric vehicles, battery maintenance, modifications, and repairs. Nikolay was an EV pioneer who passed away in 2025. His technical knowledge and generous sharing of information continues to help the EV community.

Mitsubishi Miev Pack Details - CMU connectors

By Nikolay Shishkov • July 05, 2018

miev

The connectors to the CMUs look like this:

This is a 8 pin connector - link and part numbers further down.

The connector has GND (pin 7), 12V (pin 1), CAN-H (pin 8), CAN-L (pin 4) wires. It has two additional wires that seem to form a some form of dead mans switch. It is a circuit that seems to go through all the CMUs and terminated at the BMU. I would imagine it is a fail safe if the CAN bus still works.

I would also imagine that if the BMU detects that the fail safe circuit is broken it will send error message on the external CAN bus.

Anyhow, it is enough to provide 12V and connect the CAN bus and the CMUs are reporting status every 40ms.

http://uk.farnell.com/jst-japan-solderless-terminals/08cpt-b-2a/conn-housing-rcpt-8pos-2mm/dp/2708685#