F-DO Test Stop Fault (MM)

What does F30773 mean?

A fault has occurred during the test stop procedure on the Motor Module (MM) side, specifically related to the evaluation of states for Fail-safe Digital Outputs (F-DOs). This indicates that the expected states of the DOs or diagnostic DOs were not fulfilled, or an internal timer/state issue occurred, often a mismatch between expected and read-back signals during a test state.

Complete Troubleshooting Guide

1. 1

   Check the physical wiring connections of the F-DOs for any discrepancies or damage.

2. 2

   Restart the test stop procedure to re-evaluate the F-DO states and clear the fault.

3. 3

   Analyze the fault value (W_V_XYYZZ) to understand the specific state mismatch (expected vs. read back) and the exact test stop state where the fault occurred.