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 Page39 C131B-01: Motor Error - MOT_IDIFF ISO Code C131B-01 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 Current Difference between Target Current and Measure Current is greater than 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 Probable Trouble Area Internal ECU failure, Motor Controller Error 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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