TATA BSVI Gasoline_Bifuel Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.9 Date: 24-01-2022 Prepared By: Veer K. Singh / Prudhvi B Varma Checked By: Yeshwant Jadhav Approved By: Sanjeev M. Document Part No: 2921 02 xxx xxxx Page: 791 of 1692 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. P081A-11: Crank Inhibit Starter Relay Circuit Low – Circuit Short to Ground Overview: ISO Code P081A-11 Customer Symptom Vehicle may not Start Fault Effects (On Vehicle) Crank will be inhibited Lamp Status (If Any) Sil Lamp ON after 1 drive cycle Fault Detection Condition Ignition ON and Starter Relay-2 control pin of EMS ECU is short Circuited to Ground. Normal Operating Condition Wiring Harness connections as per Circuit schematic between EMS ECU and Starter Relay-2, Relay Fully operational. Probable Trouble Area Improper Wiring Harness Connections. Healing Condition After 1 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: 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) Loose/ Damaged Connections between Starter Relay-2 and EMS ECU. 2) Loose/ Damaged Connections between Starter Relay-2 and Main relay supply or Starter Relay-2 & Starter Solenoid. 3) Check for back out of pins at ECU connector. 4) Check for damage of pins at ECU connector.
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