Vehicle Platform: NEXON ECU Name: ESCL DTC Troubleshooting Data Version: 1.4 Date: 09 Jan 2018 Author: Hitesh Kaneria Page: 61 of 88 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. B1024–11: ESCL motor driver low side circuit - Short to ground Overview: ISO Code (DTC Code) B1023-12 Customer Symptom ESCL unable to lock steering wheel. Fault Effects (On Vehicle) ESCL unable to lock steering wheel. Lamp Status (If Any) NA Fault Detection Condition This fault gets log when ESCL motor low side driver circuit is short to ground. Normal Operating Condition This fault shall not be log during ESCL locking and unlocking. Probable Trouble Area ESCL internal hardware failure Healing Condition ESCL ECU replacement Table 21: B1024-11 overview details Component Details: ESCL ECU is located on steering column behind steering wheel. ESCL ECU locks and unlocks the steering wheel based on CAN messages received from PEPS, EMS, ABS and BCM. Preliminary Checks: 1. In Ignition off condition, verify steering wheel gets lock on driver door open/ close or on pressing lock button on UID. 2. Turn ignition OFF->ON, verify steering wheel gets unlock. Troubleshooting: Start Stop 1. Keep vehicle in static condition. 2. Turn ignition ON -> OFF Replace ESCL ECU Note: Refer ESCL ECU replacement procedure doc to replace ESCL ECU. DTC’s confirmation: After rectification, ensure the following points by using TML diagnostic tool before handling over to customer. 1. Switch IGN ON -> OFF 2. Press Lock button on UID or Driver door close to open 3. Switch IGN OFF->ON and read DTC. ESCL shall not log B1024-11.
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