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OSPREY- Application
DTC Troubleshooting Data
Version: 4.0
Date: 10-02-2017
Prepared by: Mithipati Prasad
Checked by: G S Raju / Senthilnathan S
Page: 273 of 654
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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.
P0615: Starter relay command circuit open
Overview:
DTC Description as per ISO standard
Starter Relay Circuit
ECU Pin Number
29, 21
Customer Symptom
Starter relay will not engage, Vehicle start not possible.
Fault Effects (On Vehicle)
Vehicle will not start
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 open circuited
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
x
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.
x
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.
x
Check whether relay contacts weld / Stuck open or not. If found open, then rectify/replace it
x
Check whether there are any pins damaged at EMS ECU Connector. If found faulty then replace the connector or
wiring harness
x
Check whether there are any pins backed out from the EMS ECU Connector. If found faulty then replace the
connector or wiring harness.
x
Check whether the starter relay is connected in vehicle.