no_pulse — AOP coprocessor

“No pulse on” variant of the AOP panic: REWA associates it with the vibrator and its power lines, or with the audio codec circuit.

iPhone

Vibration motor (Taptic) and its power lines, or audio codec

Low confidenceVerified sourceAOP coprocessor

First check

Test haptic feedback; boot with the Taptic Engine disconnected; if unchanged, board-level diagnosis (audio codec).

Sources