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 Page51 U0028-13: Errorpassive ISO Code U0028-13 Customer Symptom No warning lamp, No heavy steering Fault Effects (On Vehicle) Partial assistance Lamp Status (If Any) Warning Lamp OFF Fault Detection Condition This DTC will appear in case of following open circuit failures: 1. CANH wire open (Vehicle connector pin B7) 2. CANL wire open (Vehicle connector pin B8) 3. Both CANH, CANL open 4. Short circuit between CANL-GND, CANH-Vbatt. Normal Operating Condition ECU communicates properly with TML diagnostic Tool. Probable Trouble Area CAN_H and CAN_L wires, Wiring fault on CAN harness:open circuit failure for CAN lines Healing Condition 1. enableRxAndTx ($00) or enableTxAndDisableRx ($02) of CommunicationControl ($28) 2. Reconnection of CAN_H & CAN_L to main CAN bus Component Details: NA Preliminary Checks: NA Trouble Shooting:
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