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: 426 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. The error is detected when the VSensing feedback signal remains low and engine speed is greater than a calibratable speed 0. Replace the connector or wiring Harness. Go to step 2. 2. Check the continuity between pin K085 of EMS and battery positive. If continuity is there then there is short circuit to battery. There is a short circuit in the harness and perform repairs accordingly. Go to step 3. 3. Are there any pins damaged at EMS ECU Connector. Replace the connector or wiring Harness. Go to step 4. 4. Are there any pins backed out from the EMS ECU Connector. Rectify/Replace Connectors. Go to Step 5. 5. If fault still persists. then replace sensor and if fault still persists then call Hotline. Follow the above procedure again for Reconfirmation. TC’s confirmation (checks before handing over vehicle to customer): 1. Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds also. 2. If error present, then rectify the errors. 3. Confirm that there is no error logged in EMS before handing over vehicle to customer. Circuit Schematic: EMS Output to starter relay High side Starter Motor Relay Input signal to EMS ECU from VSensing sensor Starter Motor K072 K055 K085 EMS ECU
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