Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 558 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent 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 B70 & Starter relay coil pin . Also Check continuity between the Main Relay supply and the relay Coil pin and Battery supply to Crank Inhibit relay contact pin . Go to Step 3 Establish continuity by rectifying harness connections as per the circuit schematic 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 Is relay getting Supply at its pin? Go to Step 6 Repair the harness as per the schematic 6 Is Starter Relay control Pin B70, short circuited to ground? Repair the harness as per the schematic Go to Step 7 7 Fault Still Persists? Replace relay and then if Fault still persists then call hotline. Follow the steps again for reconfirmation DTC’s confirmation (checks before handing over vehicle to customer): Press the clutch fully & then start the engine Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds as well
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