TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 422 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. Fuel Level Table Applicable only for Q5 single Tank (50 Ltrs.) 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) & Connector C, 16 (FLS GND) of the wired connector in case of single tank, whether it is according to the design specifications. Trouble Shooting:- Telltale blink Open 134 Blink @ 2HZ Check Point Fuel Bar Tank Level Resistance in Ohm BAR on resistance in Ohm Tolerance (+/- 2ohm) BAR off resistance in Ohm Tolerance (+/- 2ohm) Low fuel Warning TT State Short < 5 NA NA Blink @ 2HZ C1 7 48.9 8 8 23 Low Fuel Warning TT ON & OFF will be based on LFW Threshold Table 6 41.9 25 27 42 5 34.4 44 46 61 C2 4 27.4 63 65 75 3 21.4 77 79 88 2 15.4 90 92 98 C3 1 8.9 100 102 118 1 bar blink 3.9 120 120 >133 C4 >134 NA NA Blink @ 2HZ 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 -15 is present
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