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

TATA BSVI Gasoline Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.2 Date: 18-12-2019 Prepared By: Sunita Mandlik Checked By: Yeshwant Jadhav Approved By: Satish Kumar Document Part No: 2921 02 xxx xxxx Page: 1239 of 1498 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. P330B-81: Invalid temperature signal received from IBS- Invalid serial data received Overview: ISO Code P330B- 81 Customer Symptom 1.IAC (Intelligent Alternator Control) will not work. 2.ESS Autostop/Autostart function will malfunction Fault Effects (On Vehicle) 1.IAC (Intelligent Alternator Control) will not work. 2.ESS Autostop/Autostart function will malfunction Lamp Status (If Any) No Fault Detection Condition 1.IAC (Intelligent Alternator Control) will not work. 2.ESS Autostop/Autostart function will malfunction Normal Operating Condition IBS functioning properly Probable Trouble Area IBS internal error, IBS temperature measurement fault Healing Condition After 1 Drive cycles and ignition ON Fault permanent deletion 1. Scan tool Service 14 2. Stack Over Flow. 3. 40 warm up cycles. 4. ECU flashing 5. ECU power fail Component Details: The Intelligent battery sensor (IBS) is a mechatronic component with which current, voltage and temperature of a vehicle battery are acquired and used to calculate the battery state. The purpose of the IBS is to provide measured values and carry out preliminary processing for the power management in vehicle electrical systems. The values of voltage, current and temperature of the battery are recorded. The IBS delivers the recorded information to ECU via a LIN data interface. Preliminary Checks: 1) Check IBS (Intelligent Battery Sensor) Connections to ECU. 2) Check IBS (Intelligent Battery Sensor) reliability. 3) Faulty IBS Sensor. Trouble Shooting: - Step Checks IF YES IF NO 1. Check IBS (Intelligent Battery Sensor) Connections to ECU. Go to Step 2 Establish continuity by rectifying harness connections as per the circuit schematic 2. Check IBS (Intelligent Battery Sensor) reliability. Go to step 3 5 Fault Still Persists? IBS Faulty Follow the steps again for reconfirmation DTC’s Healing Confirmation: - After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer.