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 Page22 C1314-19: Motor Error - MOT_OVC ISO Code C1314-19 Customer Symptom No PSCM functionality (Heavy steering) Fault Effects (On Vehicle) No assistance Lamp Status (If Any) Warning Lamp ON ; G/Driver OFF ; Motor OFF Fault Detection Condition Measure Current is greater than threshold (Maximum Current + 10A) Pre-condition - After initialization 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 Motor current b/w 0 to 70A Probable Trouble Area Motor current consumption above the max limit for a time interval. Wire Harness short to Battery / short to GND / Between Wire Harness Short / Motor Phase short to battery / short to GND / Open by the FET Damage Wire Harness short to Battery / short to GND / Between Wire Harness Short / Motor Phase short to battery / short to GND / Open by the FET Damage Healing Condition Fault is not detected in the next IGN cycle Component Details: Motor-The PSCM uses a DC motor to generate and provide the torque to the column shaft. Preliminary Checks: 1. Check all the cables and connectors to ECU for any damage (Visually)
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