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: 385 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. P0261-11: Cylinder 1 Injector Circuit Low– Circuit Short to Ground Overview: ISO Code P0261-11 Customer Symptom Engine might Stall, Vehicle Acceleration poor, Idle not stable, Poor start ability, Lambda control deactivated. Fault Effects (On Vehicle) 1. Vehicle acceleration is poor. 2. Idle is not stable. 3. Lambda control is not active. 4. Engine may get flooded and exhaust may get red hot resulting damage to the catalytic converter. 5. Poor start ability. Lamp Status (If Any) MIL ON after 1 drive cycle Fault Detection Condition This fault gets logged if the ignition state is ON and Injector of cylinder 1 control pin is Short Circuited to Ground. Normal Operating Condition Proper Wiring Harness connections between Injector of cylinder 1 and EMS ecu. Probable Trouble Area Wiring Harness Connections Healing Condition Ignition ON and 3 driving Cycles Component Details: Injectors are normally closed valve. Injector Opens when its electromagnetic coil is energized by the EMS ecu. Preliminary Checks: 1) Loose/ Damaged Connections between injector and EMS ecu. 2) Check for back out of pins at both Injector connector and ECU connector. 3) Check for damage of pins at both injector connector and ECU connector. 4) Check the continuity from injector connector pins to the ECU pins.