X104 MCE Instrument Cluster DTC Troubleshooting Data Version: 1.4 Date: 14-Dec-19 Author: Muni Balaji / Jeeva Raj Page: 10 of 135 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. DTC’s confirmation:- After rectification, ensure the following points before handing over the system to the customer a) Battery voltage should be 9-16v. b) Ensure ECU connector is place correctly. c) In the absence of OAT sensor IC shall display ‘---‘deg. C. d) Check and ensure OAT Sensor input & follows the same Deg. C value on display. e) Check also in vehicle driving condition & check the temperature change on display. Circuit Schematic Diagram:- Check for continuity between Pin No.J1-10(GND) & J1-29 of ECU Connector. Is Continuity Present? OAT input is Short Circuit to Ground. 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. Press the mode switch button one time to show the OAT display value & Check whether display is showing the OAT value in Deg’ C. Stop Stop YES NO
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