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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: 256 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.
Is there any rust/oxidization / Sulphation observed on
Battery Terminals
Clean the Rust or
repair.
Go to Step 2
2. Is there wiring harness electrical continuity between ECU
pins 12,31 & main Relay supply.
Go to Step 3
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
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
Is Alternator functioning
Go to Step 6
Repair / Replace
6
Are EMS ECU pins 12/31 Short circuited to GND.
Repair the harness
as per the schematic Go to Step 7
7
Is Rectifiers in Alternator functioning properly?
Repair / Replace
Go to Step 8
8
Fault Still Persists?
Call Hot Line
Follow the steps
again for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):-
Confirmatory check after rectification - Check battery voltage in diagnostic tool at engine idle condition
x
Reading should be close to 12 V if alternator is not charging.
x
Reading should be close to 14 V if alternator is charging
x
Rectify the errors if any & confirm that no any error present in ECU before handed over vehicle to customer