Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 560 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 P0616-00: Starter Relay "A" Circuit Low Overview: DTC Description as per ISO standard Starter Relay “A” Circuit low- short circuit to Gnd ECU Pin Number B70 Customer Symptom Starter relay will be ON Continuously. Vehicle will start without clutch press. Fault Effects (On Vehicle) Starter Motor will be engaged without pre-condition checks like Clutch press, Engine Speed =0, vehicle Speed = 0 etc., Lamp Status (If Any) CE lamp is ON Fault Detection Condition This fault gets logged under the following conditions: Ignition ON and Starter Relay control pin of EMS ECU is short circuited to GND Normal Operating Condition Diagnostic tool display the battery voltage, crank input & engine RPM status during cranking Probable Trouble Area Starter Relay, ECU Main relay, ECU, Wiring harness Healing Condition Clear the errors, Ignition OFF to ON, engine idle & fly-up condition Component Details: Starter Relay activates the Starter solenoid for vehicle starting. EMS energizes the starter relay if all the pre-conditions required for starter motor engagement are fulfilled. Preliminary Checks Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If yes, go ahead with next steps. If not, check for other DTC’s presence. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to earlier issue closure. Check for pin back out at EMS ecu connector or EGR valve connector. Check whether there are any pins damaged at EMS ECU Connector. If found faulty then replace the connector or wiring harness Check whether there are any pins backed out from the EMS ECU Connector. If found faulty then replace the connector or wiring harness. Check whether the starter relay is connected in vehicle.
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