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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: 407 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 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 test.
Are the test successful
Go to step 4
Some problem in
Wiring harness
connections /
Injectors. Rectify
them.
4.
Check the continuity between the EMS ECU pin 6, 25,
44,63 and connector their pin 2. 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 short circuited to
battery/Ground? Perform this test by keeping Ignition Off. Is
it functioning properly?
Go to Step 6
Rectify Wiring
Harness
connections as per
the schematic
6.
Check whether the Injector LSD and EMS ECU pin 6, 25,
44,63 is short circuited to ground
Rectify Wiring
Harness
connections as per
the schematic
Go to step 7
7
Check whether all the injector pair wiring harness
resistance is in the range of 50 milli ohms to 150 milli ohms Go to Step 8
Replace the
injector wiring
harness whose
resistance is out of
range
8. Is the resistance across any of the injector terminals less
than 12.25 ohms for all 4 injectors?
Go to Step 9
Replace the
corresponding
injector
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
Call Hot line
Repeat the above
procedure for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):
x
Please fit the injector with its connector on wiring harness and remove ECU connector and check for continuity
between injector and the ECU connector.