TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 417 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. Preliminary Checks:- 1. Check Battery Voltage is normal in the range (9v - 16v) 2. Check Fuel lines for Pinch/Cut. 3. Check ECU & Sensor pins for oxidation, bending & damage. 4. Check and ensure Fuel Sensor is giving linear Resistance output w.r.to the Fuel level. 5. Check Sensor resistance on Connector C, Pin no.9 (FLS i/p 1) and Connector C, Pin no 16 (FLS Gnd) of the wired connector for single tank, whether it is according to the design specifications. 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 B1909 -11 is present Is DTC B1909-11 is Present? Check for continuity between Connector A, Pin No. 8 (GND) & Connector C, Pin no.9 (FLS input) of ECU side. Is Continuity Present? FLS input is Short Circuit to Ground. Rectify Fault at wiring Harness & wait for 20sec to recover the fault. Clear the DTC & check the change in fuel level in Fuel bars. Clear the DTC from the ECU memory. Turn Ignition OFF & ON. Check the change of fuel level in Fuel bars. YES NO YES NO Stop
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