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NEXON EV
X114H
DTC Troubleshooting Data
Version: 3.0
Date: 27-May-2020
`
19
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.
P220301:- OBC can’t turn off +12V Power supply
Overview:
ISO Code (If applicable)
P220301
Customer Symptom
NA
Fault Effect (On Vehicle)
OBC will stop charging HV battery
Lamp Status (If Any)
NA
DTC Detection Condition
This DTC gets logged if OBC can't turn off +12V Power supply with in
1 second
Normal Operating Condition
OBC can turn off its internal +12V Power supply successfully
Probable Trouble Area
OBC internal device control is failed
Healing Condition
Disconnect the gun and connect back after VCU sleep
Write up for
the system:-
The on-board charger (OBC) takes AC input and converts it to direct current to charge a HV battery. The LV supply of OBC is from 12V
battery. It requires AC HV supply voltage of 230V, 50Hz to charge the HV battery. Without the LV supply charging is not possible.
OBC communicates with HV battery through BMS.
Pre-Check Points:
KL 30
12V LV supply to OBC
KL 31
LV/Chassis ground to OBC
a) Check for 12V LV Battery Voltage is with in the range ( 7.5V to 14V)
TroubleShooting:-
Flow Diagram or table format for diagnosing the fault code
Step no
.
Description
Check Point
if YES
if NO
1
Connect the Charging Gun & switch ON
the AC supply. check for the fault code.
Fault code P226000
is present?
Replace OBC
Repair complete.
DTC
’
s
confirmation:-
After rectification, ensure the following points by referring OBC parameters using TML diagnostic tool before
handing over to customer.
a) Check whether the OBC can respond to the vehicle charging command by observing the Charge ON
indicator lamp on the cluster.
LV Schematic & Block Diagram:-
On-Board charger
230V AC supply
HV Battery
LV signal connector