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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: 438 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 the Brake Switch setting proper?
Go to step 2
Correct the setting
as per the Brake
switch TML drawing
2.
Is there continuity exists between Main Brake switch pin X
and EMS ECU pin 39 && Main brake switch pin X and
battery supply.
Go to step 3
Rectify the wiring
harness connections
as per the schematic
3.
Check whether EMS ECU pins 39 shorted to battery supply
/ Ground
Go to step 4
Rectify the wiring
harness connections
as per the schematic
4
Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to step 5
5
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Step 6
6
Is Brake switch connector damaged or pins got backed out. Rectify/Replace
Connectors
Go to step 7
7
If fault still persists,
then replace brake
switches and if
fault still persists
then Call hot line
Follow the above
procedure again for
reconfirmation
DTC’s confirmation (checks before handing over vehicle to customer):
After rectification ensure the following checks for main brake and redundant brake switches before handing over the
vehicle to customer.
x
Press the Brake pedal fully and check whether the Brake Main and redundant Switch parameters in diagnostic tool
are changed from Inactive to Active States.
x
Ensure that EMS ecu hasn’t logged
any DTC’s before handing over the vehicle back to customer.