Q501 4 Cylinder MT Application DTC Troubleshooting Data Version: 0.1 Date: 21-Sep-2018 Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta Checked By: Yogesh Jadhav Approved By: Satish Kumar P Page: 974 of 1052 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. Trouble Shooting: Step Checks IF YES IF NO 1 Check the Electrical Continuity between the water in fuel sensor and EMS ECU. For pin details, refer schematic section below. Go to next step Rectify the wiring harness connections as per the circuit schematic. 2 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring harness Go to Next Step 3 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Next Step 4 Check whether any of the water in fuel sensor interfaced pin - K009 (EMS pin) & water in fuel sensor pin 8 and 10 are short-circuited to Battery / Ground. Rectify the wiring Harness Connections Go to Next Step. 5 Take out the Fuel sample (1 KG) from subject vehicle’s fuel tank and check for presence of water in fuel. Is substantial water is present (means water content greater than 200 mg/KG % as per BS4 emission norms)? Note: Apparatus for measuring water level in fuel shall be purchased by dealer with good accuracy. Recommend driver to fill in good quality fuel and check whether any Engine parts like injectors are already damaged. If so, call hotline for assistance. Note: Refer Component replacement procedure if any component needs to be replaced. Go to next step. 6 Perform the water wading test with bonnet open and check whether any water is ingressed into fuel filter If so perform necessary corrections to avoid water ingress Go to next step 7 Fault persists Call Hotline Repeat the above steps for reconfirmation DTC’s confirmation: After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM. Before handing over the vehicle to the customer, perform the Routine – “Reset driven distance H2O in fuel lamp ON”. Otherwise, OBD tool shows vehicle driven with WIF ON a huge value.
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