Nexon MCE 2 Gen2 Digital Instrument Cluster DTC Troubleshooting Data Version: 1.0 Date: 11-June-23 Author: Vasant Date Page: 32 of 141 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 B1939 -86 is present Is DTC B1939-86 is Present? In non-ABS variant Check the three input pins VssIn (pin no. J1-27), VsGnd (pin no. J1-31) & VssPwrIn (pin no. J1-3), whether all are connected properly or any fault like STB or STG. (Or) In ABS variant check the ABS working properly. Is any respective fault present? In non-ABS variant Rectify Fault at respective Vss input pins. Clear the DTC & verify the function of the speedometer gauge. In ABS variant read DTC from ABS to confirming the root cause. Clear the DTC from the ECU memory. Turn Ignition OFF & ON. Check the function of speedometer gauge. Stop Stop YES NO YES NO Stop
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