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Vehicle Platform: OSPREY / AMP
ECU Name: ESCL
DTC Troubleshooting Data
Version: 1.0
Date: 27 Dec 2016
Author: Hitesh Kaneria
Page: 32 of 59
Copyright ©
TATA MOTORS Ltd.
Thisdocument must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
B1024–11: ESCLmotor 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 10: 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.