Part Replacement strategy IVI IC SVS Reflashing and Replacement spec Version: 0.7 Draft Released On: June 21, 2023 Copyright © Tata Motors Ltd. Page 22 of 34 Step 24. Process to update certificate forcefully Figure 9: Process to update certificate forcefully Step 25. TML Service Tool Diagnostic - Pre-requisites: o service tool to request for new certificate using REST API o TML server to generate new certificate for specific HU Unique ID o TML server to provide text content of certificate in .pem file in JSON format o service tool to convert .JSON format to .s19 format and its generate CRC for S19 sd Certificates update forcefully TML Certificate Server TML Service tool HU Telematics control module consider Certificate availablity is true consider if no certificate DTC found form HU as well as TCM Tool is aware of the vehicle metadata and Telemetics applicablity() read HU unique ID() «DID» Provide HU unique ID() «DID response» read TCM unique ID*() «DID» Provide TCM unique ID*() «DID response» forcefully delete certificates(HU Cloud TLS, HU TCM TLS*) «UDS service» «sw logic» delete certificate(HU Cloud TLS, HU TCM TLS*) force fully delete certificates(TCM HU TLS certificate)* «UDS service» «sw logic» delete certificate(TCM HU TLS)* Get Certificate( HU unique ID,TCM unique ID*, HU Cloud TLS, HU TCM TLS*,TCM HU TLS certificate* ) «HTTPS» Generate certificates and update the database() Provide Requested certificates ( HU unique ID, Certificates availability status, TCM Unique ID*, HU Cloud TLS, HU TCM TLS*, TCM HU TLS certificate*) «HTTPS (JSON)» convert HU cloud TLS certificate JSON to .s19 format () convert HU TCM TLS* certificate JSON to .s19 format () Convert TCM HU TLS certificate* JSON to required format() Flash HU Cloud TLS certificate() «UDS service» Flash HU TCM TLS certificate*() «UDS service» Power latch() «UDS service» power latch() «UDS service» HU Reboot() check integrity of certificates() Check integrity of certificate() TCM reboot() confirmation certificates flashing status along with vehicle metadata and TCM metadata*() «HTTPS» Associate HU unique ID with vehicle metadata and TCM metadata*()
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