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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 729 of 1203
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.
P061A-28: Internal Control Module Torque Performance – Signal Bias level out of Range / Zero
Adjustment Failure
Overview:
ISO Code
P061A - 28
Customer Symptom
Vehicle would not start
Fault Effects (On Vehicle)
ECU Software reset happens
Lamp Status (If Any)
SIL ON after 1 driving cycle
Fault Detection Condition
ECU internal failure
Normal Operating Condition
ECU Functions as per design intention
Probable Trouble Area
EMS ECU
Healing Condition
After 1 drive cycles
Fault permanent deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow.
3. 40 warm up cycles.
4. ECU Flashing.
5. ECU Power-Fail
Component Details:
EMS ECU is an electronic controller which controls the Engine functionality by interfacing with various sensors,
actuators and other controllers (via CAN)
Preliminary Checks:
1. Check whether the EMS is receiving Battery supply and Ground
2. Check whether the Battery is healthy
Trouble Shooting:-
Step
Checks
IF YES
IF NO
1.
Check whether the EMS ECU is receiving supply and
Ground
Go to step 2
Rectify wiring
harness
connections as
per schematic
2.
Check whether the battery is healthy
Go to step 3
Repair Battery
3
If fault still persists
Replace EMS ECU
Repeat above
procedure for
reconfirmation
DTC’s confirmation:-
After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before
handing over to customer.
Replace EMS ECU and check whether the fault is rectified or not.