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PSCM
DTC Troubleshooting Guide for Nexon
Version: 1.1
Date: 21/06/2017
Author: E&E Chassis - ERC
Page: 57 of 156
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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.
C1318 - 49: ASIC internal voltage faults - Internal electronic failure
Overview:
ISO Code
C1318-49
Customer Symptom
No PSCM functionality (Heavy steering)
Fault Effects (On Vehicle)
No assistance
Lamp Status (If Any)
Warning Lamp ON
Fault Detection Condition
ASIC internal voltage faults due to internal electronic failure
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 ECU failure.
Healing Condition
NA
Component Details:
NA
Preliminary Checks:
1. Voltage at the battery terminals should be greater than 9V and less than 16V.
2. PSCM power supply connector should have voltage between 11.5 to 16 volts for full assistance.
3. Check battery cable, wiring harness and PSCM connector terminals for damage. If not ok replace the vehicle
wiring harness.