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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: 474 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.
Are any of faults – P0203,P0268/267
appears
Follow their respective rectification
procedure and rectify those faults
Go to Step 2
2. Are any of following faults appears –
P0351, P0352, P0353
Follow their respective rectification
procedure and rectify those faults
Go to step 3
3
Are Ignition Coil B, HT Cables, Spark
plugs properly functional
Rectify/Replace the faulty Components
Go to step 4
4
Faulty/Clogged Injector cylinder 3?
Replace/Clean Injectors
Go to step 5
5
Compression Pressure Low?
Rectify the faulty component
Go to Step 6
6
Improper Valve Clearance?
Rectify according to specification
Go to step 7
7
Improper Valve Timing?
Correct valve timing through calibration
Go to Step 8
8
Any faults related to Engine Coolant
Temperature Sensor or faulty
Sensor?
Rectify/Replace Sensor
Go to Step 9
9
Is EMS ECU connector tight?
Go to step 10
Refit the connector
tightly
10 If fault still persists?
Replace the EMS ECU
DTC’s confirmation:-
After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before
handing over to customer.
Recheck the fault, fault shall not re appear.