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: 590 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. P0459-12: Evaporative Emission System Purge Control Valve Circuit Shorted to battery– Circuit Short to Battery Overview: ISO Code P0459-12 Customer Symptom Canister Purge (Evaporative system) will not work. Fault Effects (On Vehicle) 1. No effect on starting or drivability. 2. Emissions will be effected 3. Idle RPM is not stable. Lamp Status (If Any) MIL ON after 3 drive cycle Fault Detection Condition This fault gets logged if the Canister Purge Control Pin of EMS ECU is Short Circuited to Battery. Normal Operating Condition Healthy Wiring Harness connections between Purge Valve and EMS ECU Probable Trouble Area Wiring Harness Connections, Purge Valve Healing Condition After 3 drive cycles. 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: Purge Valve is a solenoid valve (Variable position), its Opening is controlled by controlling the field current of the magnetic coil. Preliminary Checks: 1. Loose or Damaged connections between Actuator and EMS ECU. 2. Check for back out of pins at both Actuator and EMS ECU Connector. 3. Check for damage of connectors at both Actuator and EMS ECU end. 4. Check whether the Actuator is stuck Open /closed – Mechanical failure.