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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: 503 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.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
x
Loose/ Damaged Connections between injector and EMS ecu.
x
Check for back out of pins at both Injector connector and ECU connector.
x
Check for damage of pins at both injector connector and ECU connector.
x
Check the continuity from injector connector pins to the ECU pins.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Check the Injector Connector for any damage
Replace connector
Go to step 2
2.
Is there any dirt or Rust on Connector
Remove the
connector and clean
it and refit it tightly
Go to Step 3
3
Perform the Injector cylinder 1,2,3,4 actuator tests. Are the
tests successful?
Go to step 4
Perform necessary
wiring harness
repairs on the failed
injector’s actuator
test.
4.
Check the continuity between the EMS ecu pin 6, 25, 44
,63 and connector pin 2 of Injector cylinder 1,3,4 & 2
respectively. Check the continuity between the injector
connector pin 1 and EMS ECU pin 7. Is continuity test
successful
Go to step 5
Establish continuity
by rectifying wiring
harness
connections as per
the schematic.
5.
Is the Injector connector pin 1 of any cylinder short circuited
to battery / Ground? Perform this test by keeping Ignition
Off.
Go to Step 6
Rectify Wiring
Harness
connections as per
the schematic
6.
Check whether the Injector LSD pin 6, 25, 44,63 is Short
circuited to Ground or HSD pin 7 is short circuited to
ground.
Rectify Wiring
Harness
connections as per
the schematic
Go to step 7
7
Is the resistance between the Injector 1 and EMS ecu less
than 1 ohm?
Go to Step 8
Replace the
Injector 1 wiring
Harness
8. Is the resistance across any of the injector terminals less
than 12.25 ohms?
Go to Step 9
Replace the
Injector of cylinder
1
9.
Check whether any injector pins are backed out at ECU
Connector or Injector connector
Rectify the
connections
Go to Step 10
10 Is there any physical damage to Injector connector / ECU
Connector
Replace the
respective
connectors
Go to step 11
11 If the fault still persists
Replace the EMS
ecu
Repeat the above
procedure for
reconfirmation