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: 1198 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. P1E06-1: Alternator low voltage error-General electric failure Overview: ISO Code P1E06-1 Customer Symptom IAC (Intelligent Alternator Control) will not work. Fault Effects (On Vehicle) IAC (Intelligent Alternator Control) will not work. Lamp Status (If Any) Nil Fault Detection Condition Check if Alternator supply short to ground Alternator voltage below threshold Normal Operating Condition Alternator Control functioning properly Probable Trouble Area Alternator 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 Alternator supply short to ground 3) Check Alternator voltage below threshold. 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. Auto Start stop button will work properly 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 Alternator supply short to ground Repair the harness as per the schematic Go to step 3 3 Check Alternator voltage below threshold. Rectify/Replace Connectors Go to Step 4 6 Fault Still Persists? Alternator Faulty Follow the steps again for reconfirmation