AWS IoT FleetWise will no longer be open to new customers as of April 30, 2026. Existing AWS IoT FleetWise customers can continue using the service. The [Guidance for Connected Mobility on AWS](https://aws.amazon.com/solutions/guidance/connected-mobility-on-aws/) provides guidance on how to develop and deploy modular services for connected mobility solutions that can be used to achieve equivalent capabilities as AWS IoT FleetWise.

# Update an AWS IoT FleetWise decoder manifest
<a name="update-decoder-manifest"></a>

**Important**  
Access to certain AWS IoT FleetWise features is currently gated. For more information, see [AWS Region and feature availability in AWS IoT FleetWise](fleetwise-regions.md).

You can use the [UpdateDecoderManifest](https://docs.aws.amazon.com/iot-fleetwise/latest/APIReference/API_UpdateDecoderManifest.html) API operation to update a decoder manifest. You can add, remove, and update network interfaces and signal decoders. You can also change the status of the decoder manifest. The following example uses the AWS CLI.

To update a decoder manifest, run the following command.

Replace *decoder-manifest-name* with the name of the decoder manifest that you're updating.

```
aws iotfleetwise update-decoder-manifest / 
                --name decoder-manifest-name /
                --status ACTIVE
```

If the signals don't have specified decoding rules, you can create default decoding rules. The signals are added to a custom decoded interface with the `CustomDecodingSignal$id` set to the fully qualified name of the signal. To update a decoder manifest with default decoding rules, run the following command.

Replace *decoder-manifest-name* with the name of the decoder manifest that you're updating.

```
aws iotfleetwise update-decoder-manifest / 
                --name decoder-manifest-name /
                --status ACTIVE
                --default-for-unmapped-signals CUSTOM_DECODING
```

**Important**  
After you activate the decoder manifest, you can't edit it.

If you [enabled encryption](key-management.md) using a customer managed AWS KMS key, include the following policy statement so that your role can invoke the `UpdateDecoderManifest` API operation. 

------
#### [ JSON ]

****  

```
{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "kms:GenerateDataKey*",
                "kms:Decrypt"
            ],
            "Resource": [
                "arn:aws:kms:us-east-1:111122223333:key/KMS_KEY_ID"
            ]
        }
    ]
}
```

------

## Verify decoder manifest update
<a name="verify-decoder-update"></a>

You can use the [ListDecoderManifestSignals](https://docs.aws.amazon.com/iot-fleetwise/latest/APIReference/API_ListDecoderManifestSignals.html) API operation to verify if decoder signals in the decoder manifest were updated. The following example uses AWS CLI.

To retrieve a paginated list of summaries of all decoder signals (nodes) in a given decoder manifest, run the following command.

Replace *decoder-manifest-name* with the name of the decoder manifest that you're checking.

```
aws iotfleetwise list-decoder-manifest-signals /
                 --name decoder-manifest-name
```

If you [enabled encryption](key-management.md) using a customer managed AWS KMS key, include the following policy statement so that your role can invoke the `ListDecoderManifestSignals` API operation. 

------
#### [ JSON ]

****  

```
{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "kms:Decrypt"
            ],
            "Resource": [
                "arn:aws:kms:us-east-1:111122223333:key/KMS_KEY_ID"
            ]
        }
    ]
}
```

------

You can use the [ListDecoderManifestNetworkInterfaces](https://docs.aws.amazon.com/iot-fleetwise/latest/APIReference/API_ListDecoderManifestNetworkInterfaces.html) API operation to verify if network interfaces in the decoder manifest were updated. The following example uses AWS CLI.

To retrieve a paginated list of summaries of all network interfaces in a given decoder manifest, run the following command.

Replace *decoder-manifest-name* with the name of the decoder manifest that you're checking.

```
aws iotfleetwise list-decoder-manifest-network-interfaces /
                 --name decoder-manifest-name
```

If you [enabled encryption](key-management.md) using a customer managed AWS KMS key, include the following policy statement so that your role can invoke the `ListDecoderManifestNetworkInterfaces` API operation. 

------
#### [ JSON ]

****  

```
{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "kms:Decrypt"
            ],
            "Resource": [
                "arn:aws:kms:us-east-1:111122223333:key/KMS_KEY_ID"
            ]
        }
    ]
}
```

------