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: 212 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. Is the fuel Circuit Clogged Rectify / Replace the Air inlet circuit Go to Step 2 2 Is there any rust/oxidization observed on fuel pump relay Terminals Clean the Rust or repair or replace Go to step 3 3 Is there wiring harness electrical continuity between ECU pin K71, and fuel pump relay contact input Go to Step 4 Establish continuity by rectifying harness connections as per the circuit schematic 4 Are there any pins damaged at relay housing/EMS ECU Connector Replace the connector or wiring harness Go to step 5 5 Are there any pins backed out from the relay housing /EMS ECU Connector Rectify/Replace Connectors Go to Step 6 6 Is Fuel pump relay command pin K71 open circuit. Repair the harness as per the schematic Go to Step 7 7 Is relay physically Damaged Replace the relay Go to Step 8 8 Fault Still Persists? Call Hotline. Follow the steps again for reconfirmation DTC’s confirmation: After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM.
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