Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 68 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent P268F - 56- Cylinder 4 Injector Data Incompatible Overview: Code Cause Effect on Vehicle Fault Code: P268F- 56 1. C3I data not written in ECU for cylinder 4 1. CE lamp ON 2. Performance low 3. Increased engine noise Checkpoints: 1. Check Battery Voltage Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check the Battery voltage Check the battery voltage Step 2 Check C3I value for cylinder 4 Data check and update the C3I in ECU. Circuit Description: ECM injects fuel in the cylinder with the help of injectors. ECM monitors the engine sensors and determines the precise quantity of fuel to be injected. ECM turns the injector on for a precise amount of time referred to as injection pulse width or injection duration to deliver the calculated fuel in cylinder. Injector is turned on through high side driver (supply) as well as low side driver (ground) present. Circuit Schematic Diagram:
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