TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

X0 MCE (Tiago / Tigor) Instrument Cluster DTC Troubleshooting Data Version: 1.4 Date: 14-Dec-19 Author: Jeeva Raj / Sharad Shivane Page: 31 of 135 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. B1939 - 86:- Vehicle Speed Signal output Implausible Signal Invalid Overview:- ISO Code B1939 – 86 Customer Symptom No Speedometer indication in Gauge Fault Effects (On Vehicle) N/A Lamp Status (If Any) N/A Fault Detection Condition During vehicle running Speedometer pointer shall be at ‘ 0 ’ position. Normal Operating Condition Speedometer gauge shall move the pointer w.r.to the speed sensor input frequency pulses. The normal operating range is b/w 2 to 260 Hz. 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 Clearing fault. Ignition Off/On Component Details:- VSS Sensor - It gives direct frequency pulse input to the Cluster w.r.to the wheel rotation. It indicates the vehicle speed with pointer position in gauge. Preliminary Checks:- 1. Check Battery Voltage is normal in the range(9v - 16v) 2. Check VSS sensor lines for Pinch/Cut. 3. Check ECU & Sensor pins for oxidation, bending & damage. 4. Check Sensor input on Pin no. 27(VSS i/p) & 31(VSS Gnd) of the wired connector, whether it is exact to the Speedometer table.