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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 545 of 1203
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 observed on Ignition Coil A
connector terminals
Clean the Rust or
repair or replace
Go to Step 2
2.
Is there wiring harness electrical continuity between
ECUpins 256 and Ignition Coil A connector pin. Is there
continuity between Ignition coil A connector pin
X
and 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 Ignition Coil A/EMS ECU
Connector
Replace the
connector or wiring
harness
Go to step 4
4
Are there any pins backed out from the Ignition Coil A /EMS
ECU Connector
Rectify/Replace
Connectors
Go to Step 5
5
Is Sensor Signal Pin 256 Short Circuited to Battery or
Ground?
Repair the harness
as per the schematic Go to Step 6
6
Is Ignition Coil A / HT Cables physically Damaged
Replace HT Cables
or Ignition coil
Go to Step 7
7
Fault still persists?
Replace Ignition
Coil, If fault still
persists then replace
EMS ECU
Repeat the above
procedure for
reconfirmation.
DTC’s confirmation:-
Recheck the fault, fault shall not reappear.