Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 148 of 150 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. U0127 - 08:- Lost Communication With Tire Pressure Monitor Control Module - Bus Signal / Message Failures Overview: ISO Code U0127 – 08 Lost Communication With Tire Pressure Monitor Control Module - Bus Signal / Message Failures Customer Symptom Following Telematics features will not be working:- Alerts about critical car parameters (Including battery related alerts), Tire pressure on cluster, Speed Alert, Idle alert Fault Effects (On Vehicle) TPMS related data will not export to cloud platform Fault Detection Condition Relevant functional DTCs present in TCU .DTC is set in case of Lost Communication With IPC Module Normal Operating Condition IPC ECU communicates properly with TCU in normal condition. Probable Trouble Area CAN_H and CAN_L wires CAN transceiver faulty Faulty TPMS ECU The TCU has detected a communication problem on the CAN regarding the TPMS Module CAN high / CAN low pins shorted to Battery/Open/ shorted to Ground DTC is to be logged when the subscribed message is not available on the CAN bus from TPMS module Healing Condition 1. Verify DTC ageing-Clear in case of ageing 2. Check CAN H and CAN L connections for short/open 3. Check for CAN transceiver faulty ,if it is fault then replace 4. check whether any other CAN-related DTCs are set in the TCU. In that case, check for problems with the CAN hardware (TCU and bus) 5. Clear the DTC 6. Verify TPMS DTCs and check for any related DTCs 7. Follow TPMS trouble shooting guideline 8. If problem persists after above steps (from 1 to 7) then follow TPMS ECU DTC trouble shooting guide
RkJQdWJsaXNoZXIy MTIwNTUz