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. PSCM DTC Troubleshooting Guide for Mando EPAS Version: 1.1 Date: 14/01/2019 Author: E&E Chassis - ERC Page84 U3006-16: Battery Voltage Low ISO Code U3006 – 16 Customer Symptom No warning lamp, Reduced assistance Fault Effects (On Vehicle) Reduced Assistance Lamp Status (If Any) Warning Lamp ON ; G/Driver ON ; Motor ON Fault Detection Condition If Battery(supply) voltage goes below 10V (Low volt reduced assistance available till 8.3V) If Alternator is not charging the battery and alternator voltage is less than 13.5V or 0V. Normal Operating Condition PSCM should provide assist if steering wheel is steered after engine is cranked. Normal operating range: ECU will be awake from 6V to 24V. Full assistance is b/w 10V to 18V Low volt. reduced assistance is b/w 8.3V to 10V High volt. reduced assistance is b/w 18V to 24V Probable Trouble Area Discharged Battery Fuse blown (60 amp) Battery cable terminal (corroded/Sulphation/Loose) Alternator is undercharging High resistance within the supply cable. Loose PSCM power connector etc. Healing Condition VBAT >= 10.3V Component Details: NA Preliminary Checks: 1. Voltage at the battery terminals should be greater than 11.5V. 2. PSCM power supply connector should have greater than 10V for full assistance. 3. Check battery cable and PSCM connector terminals for damage. 4. Check PSCM ECU for pin bend/damage. 5. Alternator output voltage should be between 13.5 V to 14.5 V in engine running condition.
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