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: 411 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. Are Relay Contacts weld / Stuck open?. Replace the Relay Go to Step 2 2. Is there wiring harness electrical continuity between ECU pin K55 & Starter relay coil pin X. Also Check continuity between the Main Relay supply and the relay Coil pin X and Battery supply to Crank Inhibit relay contact pin X. Go to Step 3 Establish continuity by rectifying harness connections as per the circuit schematic 3. ECU pin K85 short to ground or open circuit? Repair the harness as per the schematic Go to step 4 4 Is relay getting Supply Go to Step 5 Repair the harness as per the schematic 6 Fault Still Persists? Replace relay and then if Fault still persists then call hotline. Follow the steps again for reconfirmation DTC’s confirmation: Press the clutch fully & then start the engine Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds as wellM. Circuit Schematic: EMS ECU
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