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: 1017 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. P3004-71: Welded Contact at Crank Inhibit Relay – Actuator Stuck Overview: ISO Code P3004-71 Customer Symptom Vehicle will not Start Fault Effects (On Vehicle) Vehicle crank inhibited for 10 sec Lamp Status (If Any) CE Lamp ON after 3 drive cycles Fault Detection Condition Ignition ON and Crank relay contacts are welded or Starter Relay-2 contact pin X shorted to battery. Normal Operating Condition Starter Control Circuit wiring harness connections as per the schematic, Relay Fully operational. Probable Trouble Area Improper Wiring Harness Connections for starter control Circuit, Starter Relay-2 Stuck closed Healing Condition After 1 Drive 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: Starter Relay-2 is a normally Open relay. It is an electrically controlled switch. By energizing the coil of the relay, its contacts get closed. Preliminary Checks: 1) Crank Inhibited relay contacts welded. 2) Loose/ Damaged Connections between Starter Relay-2 and EMS ecu. 3) Loose/ Damaged Connections between Starter Relay-2 coil pin X and Main relay supply or Starter Relay-2 contact pin & Starter Solenoid or Starter Relay-2 contact pin X and Starter relay Contact pin X. 4) Check for back out of pins at ECU connector. 5) Check for damage of pins at ECU connector.