Electropulse

An electropulse is an aspect of Transformer physiology and, if fading, meant they were slowly dying.

Fiction

The Transformers cartoon

When Optimus Prime was heavily damaged after a Decepticon attack, his electropulse was fading rapidly and would have meant his termination had he not been repaired. Divide and Conquer

Prime cartoon

After Autobot Outpost Omega One had fallen victim to a Scraplet attack, Bumblebee was hooked up to an electropulse monitor which Ratchet had Raf Esquivel check on as the Autobots were recovering. Scrapheap