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PSCM
DTC Troubleshooting Guide for Nexon
Version: 1.1
Date: 21/06/2017
Author: E&E Chassis - ERC
Page: 36 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.
C1304 - 01: Steering torque sensor – General electrical failure
Overview:
ISO Code
C1304-01
Customer Symptom
No PSCM functionality (Heavy steering)
Fault Effects (On Vehicle)
No Assistance
Lamp Status (If Any)
Warning Lamp ON
Fault Detection Condition
NA
Normal Operating Condition
PSCM should provide assist if steering wheel is steered after
engine is cranked. Normal operating range:
ECU will awake from 6V to 18V.
Full assistance is b/w 10V to 16V
Reduced assistance is b/w 8.7V to 10V
Probable Trouble Area
Internal electrical failure in torque sensor
Healing Condition
NA
Component Details:
Steering Torque Sensor – The torque sensor detects the twist of the torsion bar and converts the applied torque into an
electrical signal. The PSCM ECU uses that signal to calculate the amount of power assist the DC motor should provide.
Preliminary Checks:
1. Check visually torque sensor connector and wiring harness to PSCM ECU for any damage/open.
In case of damage replace the steering column.
2. Visually check ECU torque sensor connector for damage. In case of damage replace the ECU.