Holding the disconnected battery leads together for about a minute will also do a passive discharge.
VEHICLE NETWORK MALFUNCTION AND MASTER WARNING LIGHT ON
2023 Mazda CX-50
Some owners may see the following error Message in Instrument Cluster.
Network Malfunction Error.
or
Master Warning Lamp on.
or
Connected Vehicle Range Strength-Reception Icon showing 'X'
![Rectangle Font Parallel Circle Symmetry]()
This is almost always because your TCU or Telematics Communication Unit internal malfunction, and needs the Driver (Software) to be updated Via USB Flash Drive.
If you are not having any luck with your Mazda Dealer then I may be able to assist with new update, however you should get your Dealer to rectify.
You must supply me with FULL VIN and detail.
There is no charge.
Note After Update..
After TCU update, if still having issues do the following:
1. Disconnect Negative Battery terminal and turn on Headlamps or Stop Lights to drain residual power in system, leave disconnected for about 1 hour, reconnect Battery terminal.
Your radio station pre-set must be tuned again.
Master Warning lamp should not return.
Some owners may see the following error Message in Instrument Cluster.
Network Malfunction Error.
or
Master Warning Lamp on.
or
Connected Vehicle Range Strength-Reception Icon showing 'X'
This is almost always because your TCU or Telematics Communication Unit internal malfunction, and needs the Driver (Software) to be updated Via USB Flash Drive.
If you are not having any luck with your Mazda Dealer then I may be able to assist with new update, however you should get your Dealer to rectify.
You must supply me with FULL VIN and detail.
There is no charge.
Note After Update..
After TCU update, if still having issues do the following:
1. Disconnect Negative Battery terminal and turn on Headlamps or Stop Lights to drain residual power in system, leave disconnected for about 1 hour, reconnect Battery terminal.
Your radio station pre-set must be tuned again.
Master Warning lamp should not return.
