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Q501 4 Cylinder MT Application
DTC Troubleshooting Data
Version: 0.1
Date: 21-Sep-2018
Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta
Checked By: Yogesh Jadhav
Approved By: Satish Kumar P
Page: 880 of 1052
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.
P0602-45:Internal Control Module Read only Memory (ROM) error – Error state of EEPROM (program memory
failure)
Overview:
DTC Description (User Friendly)
Error state of EEPROM (program memory failure)
ECU Pin Number
NA
Customer Symptom
MIL ON1, Engine functionality not guaranteed
Fault Effects (On Vehicle)
Engine functionality not guaranteed
Lamp Status (If Any)
MIL ON 1 (MIL Off after 3 warm up cycle (Drive cycle with 22
degrees of coolant temperature))
Fault Detection Condition (Root cause)
If a block cannot be written more than 3 times, an error will be
registered
Normal Operating Condition
No fault
Probable Trouble Area
EMS ECU
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
EMS ECU controls the engine functions and some vehicle functions with the help of Sensor
information and actuator control. Memory chips in EMS ECU plays a crucial part in storing the software and operating the
applications.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.
Trouble Shooting:
Step Checks
IF YES
IF NO
1.
Re-flash the EMS ECU with latest SW. Fault persists?
Call Hot line
Go to next step
2.
Fault Persists.
Call Hotline
Repeat the above
steps for re-
confirmation