Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 478 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent Step 8 Perform Injector buzz and back leak test. Replace injector, if abnormal - Step 9 If there are no other problems as mentioned above, replace the O2 sensor 2 - Verification condition: Drive the vehicle in city and highway condition with many accelerations followed by decelerations for 20 mins. Circuit Description: The enabling conditions have been defined to identify the conditions where the upstream WRAF sensor signal can be accurately compared to the commanded AFR. To avoid false failure due to injectors drift or air estimation error, the diagnostic will be enabled only when the AFR closed loop control is active. The control will adjust the fuel quantity to match the measured AFR with the commanded one, and if the closed loop control reaches its maximum correction authority and still cannot reach the target, the rationality fault will be raised. Circuit Schematic Diagram: Component Location & Image:
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