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NEXON EV
X114H: DTC Troubleshooting Document for BMS
Version: 3.0
Date: 01
th
July 2020
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.
P1235 - 13:- BMS_NegMainRlyConglut - circuit open
Overview:
ISO Code
P1235 - 13
Customer Symptom
Vehicle cannot be cranked
Fault Effects (On Vehicle)
No drive
No charging
Lamp Status (If Any)
HV Fault alarm
Fault occurrence scenario
Any operation
Normal Operating Condition
No fault
Probable Trouble Area
Negative contactor inside battery pack
Healing Condition
NA
System Details:
Negative contactor is located on high voltage side inside the battery pack and its ON/OFF status will be
populated in diagnostics through DID parameter
3404
. Negative contactor is supposed to work
throughout the battery life.
Preliminary Checks:
1)
Ensure the vehicle is parked and not in charging
2)
Ensure that the vehicle is in ignition ON condition
Inspection Method:
Connect the tool and communicate to the battery pack as instructed through APPENDIX-C
Read DTC information of DTC ID –
P1235 - 13
Rectification Action:
1)
If DTC is appearing in real time, clear DTC information through service tool
2)
If DTC is not appearing in real-time but has only occurred before, store the snapshot data. store the
snapshot data.
3)
Clear the DTC information on the respective DTC ID.
DTC’s confirmation:
After clearing, ensure the following points by referring to BMS DTC list.
1)
Read DTC ID –
P1235 – 13
for the existence of DTC information.
2)
If DTC still exists, reflash the battery pack using the service tool with the latest release SW available
in PLM database.
3)
Read DTC ID –
P1235 – 13
for the existence of DTC information post flashing.
4)
If DTC still exists, the HV battery pack component has to be replaced as instructed by the respective
ECU replacement guide.
Component Location & Image;Connector Location; Connector View & Information: -
APPENDIX-A