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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.
After clearing, ensure the following points by referring to BMS DTC list.
1)
Read DTC ID –
P121F– 21
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 –
P121F– 21
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
P1220 - 22:- BMS temperature difference high first level alarm - signal amplitude >
maximum
Overview:
ISO Code
P1220 - 22
Customer Symptom
NA
Fault Effects (On Vehicle)
None
Lamp Status (If Any)
HV Fault alarm
Fault occurrence scenario(In the order of
probability)
NA
Normal Operating Condition
NA
Probable Trouble Area
Battery Cooling system
Healing Condition
Running battery coolant pump at full capacity
System Details:
Battery cell temperature is detected by the BMS internally and the value of the maximum and minimum
temperatures is populated in diagnostics through DID parameters
3409
&
340B
.
Preliminary Checks:
Inspection Method:
Connect the tool and communicate to the battery pack as instructed through APPENDIX-C
Read DTC information of DTC ID –
P1220 - 22
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.
3)
Vehicle has to be kept isolated for a minimum of 6 hrs without operating to equalize the
temperature differences inside battery pack
4)
Temperature difference has to be verified after isolation using DID information mentioned above.
5)
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 –
P1220 – 22
for the existence of DTC information.