---
title: E78 MOD11 Comms!
description: CAN bus communication with Module 11 (Undercarriage Module) has been lost. Check the CAN bus connection to the Undercarriage module. Could potentially be a faulty module - replace if required. Turn of
---

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# E78 MOD11 Comms!

### Description of error

CAN bus communication with Module 11 (Undercarriage Module) has been lost.

### Solution

Check the CAN bus connection to the Undercarriage module. Could potentially be a faulty module - replace if required. Turn off power supply before disconnection or reconnection. Pay particular attention to the connection through the machine electrical slip ring assembly - possible water ingress into the slip ring, for instance.

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