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: 1230 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. P3310-1: Alternator Relative low voltage error-General electric failure Overview: ISO Code P3310-1 Customer Symptom Alternator Control will not work, Start stop function disable Fault Effects (On Vehicle) Alternator Control will not work, Start stop function disable Lamp Status (If Any) Nil Fault Detection Condition Check if Alternator Voltage is less than 6.5V Normal Operating Condition Alternator Control functioning properly Probable Trouble Area Alternator, Wiring harness 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 Alternator control integrated circuit is a monolithic multifunction communicated regulator specifically designed for closed loop voltage control for Valeo 12V automotive 3 phase alternators with a rotating field winding. The ECU will be able to communicate with the IAC via LIN interface. Preliminary Checks: 1) Loose/ Damaged Connections between Alternator control and EMS ECU pin no. 129. 2) Check for connections of regulator 3) Check for damage of pins at regulator connector. Trouble Shooting: - DTC’s Healing Confirmation: - After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. Circuit Schematic Diagram: Step Checks IF YES IF NO 1. Is there wiring harness electrical continuity between ECU pin 129 & alternator signal pin. Go to Step 2 Establish continuity by rectifying harness connections as per the circuit schematic 2. Check for connections of regulator Rectify/Replace Connectors Go to step 3 3 Check for damage of pins at regulator connector. Rectify/Replace Connectors Go to Step 4 4 Fault Still Persists? Replace alternator and then if Fault still persists then Replace EMS ECU Follow the steps again for reconfirmation