# Troubleshooting Y Motor Errors on the MiSeq

The following MiSeq Y motor errors usually stop the run and indicate communication problems with the stage or problems with stage hardware:

* Y Motor: Closed-loop move cannot reach target position: Start = 75.4150390625 mm, Target = 75.40472 mm, Distance = -0.0103190625000025 mm, Stopped at 74.42236328125 mm, ExceptionMessage =
* The FPGA reported an error while executing command "YMVTO 154429"; error message: "Error: too many steps needed"
* Error: Timeout of 60.000 seconds exceeded while waiting for FPGA command "YMVTILE 1327" to complete

  ![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-38d77c353d67a796f544fc5931614b614af9057b%2Fimage1.png?alt=media\&token=787f2182-865c-4cd6-89b3-2bc2a9f1f217)

  ![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-b03accaef0186875d84acfa93352916168fc0c89%2Fimage2.png?alt=media\&token=14e0edcf-1b78-4f60-a92e-2cf729b22a64)

**Troubleshooting Steps**:

1. Perform the post-run wash, if the run stops or after the run is completed.
2. Power cycle\* the MiSeq.
3. If no issues with re-initialization, perform the **Y Stage test 5 times.**

* Make sure that a used flow cell is loaded on the instrument (the same wash flow cell should be okay).
* Select Y Stage test.
  * MiSeq Control Software (MCS) v 4.0: From Main Menu, select System Check.
  * MCS 3.1 and older: From Welcome Screen, select Manage Instrument, select System Check.
* Follow the prompts on the screen to start the test, and repeat the test 4 more times (5 times total).

4. If all Y Stage tests pass continue with normal sequencing.
5. If the system fails to initialize or any of the 5 replicates of the Y Stage test fail, contact [Illumina Technical Support](https://www.illumina.com/company/contact-us.html#/) for further assistance.

For further information, search for the following Knowledge Base articles:

* \***How to Shut down or power cycle the MiSeq.**
* **\*How To Power Cycle the MiSeq Video.**
* **System Checks on MiSeq.**

\
\
\ <br>

|                                                                                                                                                                                                                                                                                                                                                                        |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| *For any feedback or questions regarding this article (Illumina Knowledge Article #1452), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000001452%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |