Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 382 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 Verification condition: Drive the vehicle in city and highway condition with many accelerations followed by decelerations for 20 mins. Circuit Description: The Wide Range Air / Fuel (WRAF) sensor is used for the Air / Fuel ratio (AFR) closed loop control, correcting the fuel quantity depending on the measured AFR error. Therefore, a slow response rate of the WRAF sensor can have a large impact on the emissions The goal of this monitoring strategy is to measure the response time of the WRAF sensor and to set a fault when this response time becomes critical in terms of emission level or drivability or simply becomes insufficient for other diagnostics. Circuit Schematic Diagram: Component Location & Image:
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