740 / 801
NEXON EV
X114H
DTC Troubleshooting Data
Version: 3.0
Date: 27-May-2020
`
67
Author: K Tejaswini Manasa/ Navya Krishnan/Gaurav Jha
Copyright © TATA MOTORS Ltd.
This document must not be used in anyway, such as copying and redistributing to third parties, without the consent of author.
TroubleShooting:-
Flow Diagram or table format for diagnosing the fault code
Step no
.
Description
Check Point
if YES
if NO
1
Remove the 12V LV battery negative
terminal.
After a minute connect the 12V LV battery
negative terminal & "Ignition Switch" to ON
position.
Crank and wait for 2 minutes.
Check for the fault code.
Fault code
P130028 is
present?
Go to step 2
Repair complete.
2
Check the DCDC Converter fuse in PDU DTC (
Refer the HV schematic )
Is fault code is
present?
Go to PDU DTC
trouble shooting
document and clear the
fault
Go to step 3
3
Check for HV battery under voltage DTC
Is fault code is
present?
Go to HV battery DTC
trouble shooting
document and clear the
fault
Replace DCDC
Converter
DTC
’
s
confirmation:-
After rectification, ensure the following points by referring DCDC parameters using TML diagnostic tool before handing over to
customer.
a) DCDC converter charging LV battery in the range of 8V to 16V
Schematic Block Diagram:-