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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: 249 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 continuity between ECU and EGR modulator
connector as per circuit schematic. Any issue found?
Follow electrical
continuity check
procedure.
Replace/rectify
harness if required
Go to Next Step
2. Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to Next Step
3
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
4
Check for AMF sensor functionality and also check whether
the EMS ECU pin number 55 is short to battery.
if problem identified
replace the AMF
sensor also rectify
the wiring harness.
Go to Next Step
5
Check also continuity between Inter mediate connector (Y)
to EGR - EVRV modulator connector 1 (Y)
–
12 V supply
Rectify/Replace
modulator connector
Go to Next Step
6
Ensure battery voltage is more than 12V at engine idle
Rectify/replace
battery
Go to Next Step
7
Fault Still Persists?
If Fault still persists
then EGR
modulator/ EGR
valve. If fault still
persists then call hot
line.
Follow the steps
again for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):
x
Please fit the EGR & ECU connector.
x
Check the errors at Ignition ON, engine running @ Idle & Fly-up with different vehicle speeds as well.
x
If error present, then rectify the errors.
x
Confirm that there is no error logged in EMS before handing over vehicle to customer.
x
Run the actuator test for EGR valve and ensure result is positive.