TATA BSVI Gasoline_Bifuel Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 2.6 Date: 5-10-2023 Prepared By: Pradip Shimpi Checked By: Yeshwant Jadhav Approved By: Sanjeev M. Document Part No: 2921 02 xxx xxxx Page: 1515 of 1720 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. P1017-92: min fault of multiplicative adaptation value in CNG-mode - CNG System Too Rich Bank 1 Overview: ISO Code P1017-92 Customer Symptom Poor Driveability, Vehicle stall Fault Effects (On Vehicle) Poor Driveability, Vehicle Stall Lamp Status (If Any) MIL ON after 3 drive cycle Fault Detection Condition CNG System Too Rich Bank 1 (More fuel injection than required) Normal Operating Condition Normal driving without any driveability issue, CNG Injectors, sparkplugs, and ignition coils functioning as required, no leakage in intake air system Probable Trouble Area Sparkplug(s), ignition coil(s), Injector(s), Intake air system, and EMS ECU 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: The CNG Fuel injectors are normally closed solenoid valves which operate when the electromagnetic core is energized by ECU. Based on engine operating conditions, ECU adjusts injection pulse widths to inject precise amount of fuel required. Ignition coil works on the principle of secondary high voltage generation by induction, primary of coil is triggered by the ECU which maintains required dwell time to energize the coil. A sparkplug is a device for delivering electric current from an ignition system to the combustion chamber of a sparkignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.
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