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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: 477 of 654
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.
Check whether the EMS ECU is getting power supply and
GND
Go to step 2
Rectify wiring
Harness as per the
schematic if found
faulty
2. Check whether the Main relay is faulty. Check sensor
connections for rust dirt etc.,
Rectify/Replace if
found main relay is
faulty and clean the
rust or dirt.
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
Fault Still Persists?
Replace relay and
then if Fault still
persists then
Replace EMS ECU
Follow the steps
again for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):
x
Visually check the initial pre check at ignition ON for MIL & CEL
x
Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds also
x
If error present, then rectify the errors. Confirm that there are no errors logged by EMS before handing over
vehicle to customer.