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PSCM
DTC Troubleshooting Guide for Nexon
Version: 1.1
Date: 21/06/2017
Author: E&E Chassis - ERC
Page: 124 of 156
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.
Preliminary Checks:
Pre-check
Check the wiring harness resistance between CAN_H and CAN_L @
Diagnostic OBD connector
Is Resistance
60
Ω?
Is Resistance
120
Ω?
Check if ECM and IPC are
connected properly
Repair the wiring harness
Is Resistance 0
Ω
to
10
Ω?
YES
YES
NO
NO
YES
NO
Connect ECM and
IPC properly
Is resistance between 0 to 10?
NO
YES
Check the continuity of
the CAN wiring harness
between IPC and ECM (
terminating ECUs) is continuity there?
NO
YES
There is short between CAN_H- CAN_L and
IC tale tell indication is ON
Resistance is in Mega Ω; both
terminating ECUs are not connected
Check
for short conditions between
CAN_H and CAN_L
with Batt and GND.
End