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 reconfirmation
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