TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 409 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. B190B - 15:- Outside Ambient Temperature Sensor Input Short To Battery or Open Overview:- ISO Code B190B - 15 Customer Symptom Customer can see ‘--‘ on the display Fault Effects (On Vehicle) N/A Lamp Status (If Any) N/A Fault Detection Condition IC shall display OAT as ‘--‘ deg. C. IC shall transmit OAT CAN signals as default 25deg.C value continuously and status as implausible. No OAT indication on IC. Normal Operating Condition IC shall display OAT value & Operating range is b/w -40 to 85 Deg. 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 On/Off. Component Details:- OAT Sensor - This sensor gives direct resistive input to the Cluster w.r.to the temperature changes in Outside environment. Refer below table for resistance Vs temperature mapping.
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