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: 713 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. P0626-15: Alternator -Generator Field/F Terminal Circuit High– Circuit Short to Battery or Open Overview: ISO Code P0626-15 Customer Symptom Vehicle start and battery charging while driving may get affected.No Limphome- switch ON the service lamp Fault Effects (On Vehicle) Vehicle start and battery Charging while driving may get affected Lamp Status (If Any) CE lamp ON after 3 drive cycle Fault Detection Condition This fault gets logged if the DF Signal pin of EMS ECU is Short circuited to Battery or Open Circuited. Normal Operating Condition Plausible DF signal from Alternator / Healthy Wiring harness Connections between EMS ECU and Alternator Terminal Probable Trouble Area Alternator Faulty, Wiring Harness Connections Healing Condition At Engine Running and after 1 drive cycle of Fault rectification Fault Permanent Deletion 1. Clear DTC Command form Scan tool 2. Stack Over Flow. 3. 40 warm up cycles. 4. ECU Flashing. 5. ECU Power-Fail Component Details: Alternator DF signal gives the Current Electrical loadon vehicle – information to EMS ECU. Based on which, EMS ECU calculates, how much additional torque to be developed for Alternator to deliver the load. Preliminary Checks: 1) Loose/ Damaged Connections between Alternator Terminal and EMS ECU. 2) Check for back out of pins at both Alternator Terminal and ECU connector. 3) Check for damage of pins at both Alternator Terminal and ECU connector. 4) Check the continuity from Alternator Terminal to the ECU pin. 5) Alternator Functional?