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: 532 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. P0352-12: Ignition Coil “B” Primary Control Circuit High– Circuit Short to Battery Overview: ISO Code P0352-12 Customer Symptom 1. Engine shuts off and can be only started after Ignition switch resetting or coil has cooled down. 2. Misfires may happen Fault Effects (On Vehicle) 1. Engine shuts off and can be only started after Ignition switch resetting or coil has cooled down. 2. Misfires may happen Lamp Status (If Any) MIL on after 1 drive cycle Fault Detection Condition This fault gets logged when the Ignition oil B control pin of EMS ECU Is short Circuited to battery supply Normal Operating Condition Current flown into the Ignition Coil “B” primary Circuit is in the range of the calibrated thresholds. Probable Trouble Area Wiring Harness, Ignition Coil, HT Cables, EMS ECU Healing Condition After 1 driving cycle 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: An ignition coil (also called a spark coil ) is an induction coil in an automobile's ignition system which transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel. The wire that goes from the ignition coil to the distributor and the high voltage wires that go from the distributor to each of the spark plugs are called spark plug wires or high tension leads. Preliminary Checks: 1) Loose/ Damaged Connections between Ignition coil B and EMS ECU. 2) Check for back out of pins at both Ignition Coil connector and ECU connector. 3) Check for damage of pins at both Ignition Coil connector and ECU connector. 4) Faulty Ignition Coil B. 5) HT Cables damaged