Nexon_MCE2_7inch_Digital Instrument Cluster_DTC Trouble Shooting Data Version: 1.0 Date: 09-May-2023 Author: Suraj Patil / Rajesh Patil Page: 23 of 167 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. B1909 - 15:- Fuel Level Sensor Input Short To Battery or Open Overview: - ISO Code B1909 - 15 Customer Symptom No fuel indication Fault Effects (On Vehicle) N/A Lamp Status (If Any) Low fuel warning Lamp shall be blink. Fault Detection Condition Fuel gauge bars shall turn Off, Low fuel warning lamp shall blink. Normal Operating Condition Fuel bars shall display w.r.to the input Resistance value. Probable Trouble Area Related wiring Harness, connector or terminals damaged. IPC connector wired wrong, Harness wire shorted, Sensor connector wired wrong, Sensor damaged. Healing Condition IC shall recover from open/short condition after receiving valid values for 20s or Ignition Off/On. Component Details: - Fuel Sensor - This sensor gives direct resistive input to the Cluster w.r.to the change in the fuel inside Tank. Refer below fuel gauge calibration table for 44ltr tank – High & Low End. 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 44 < 8 NA NA Blink @ 2HZ C1 7 42 11 11 26.5 Low Fuel Warning TT ON & OFF will be based on LFW Threshold Table 6 36 28.5 30.5 40 5 30 42 44 53 C2 4 24 55 57 71 3 18 73 75 87 2 13 89 91 95 C3 1 8 97 99 118 1 bar blink 3 120 120 >133 Open 134 Blink @ 2HZ
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