TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 405 of 584 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. Trouble Shooting:- Turn ON Ignition. Connect the TML Diagnostic Tool. Check the status of DTC’s (Memorized/Current) Record the DTC & Clear DTC’s Turn Ignition OFF & ON Verify If DTC B190B -11 is present Is DTC B190B-11 is Present? Check for continuity between Connector C, Pin No. 27 (GND) & Connector C, Pin No. 26 of ECU Connector. Is Continuity Present? OAT input is Short Circuit to Ground. Check the CAN signal o/p it shall transmitted as 25 Deg. C from IC ECU and status signal as implausible Rectify Fault at wiring Harness & wait for 20sec to recover the fault. Clear the DTC. Verify the function of OAT Sensor with multimeter & OAT value on LCD display. Clear the DTC from the ECU memory. Turn Ignition OFF & ON. Check whether display is showing the OAT value in Deg’ C. Stop Stop YES NO YES NO Stop
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