HARRIER BOOK 2

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: 870 of 1052

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.

P0563-17: System Voltage High – Upstream main relay battery voltage above threshold

Overview:

DTC Description (User Friendly)

Upstream main relay battery voltage above threshold

ECU Pin Number

K01,K03,K05,K75

Customer Symptom

CEL ON. Vehicle will be non-functional.

Fault Effects (On Vehicle)

Vehicle non-functional

Lamp Status (If Any)

MIL OFF, CEL ON

Fault Detection Condition (Root cause)

EMS ECU receives more than 18 V supply voltage from

Battery.

Normal Operating Condition

EMS ECU input power supply voltage in range of 9 – 18 V

Probable Trouble Area

Load dump, Jump start with 24 V battery

Healing Condition

Rectify the error

Clear through diagnostic tool

Ignition OFF & ON

Component Details:

Lead Acid Battery provides supply voltage to all vehicle electrical and electro mechanical components.

Preliminary Checks:

1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If

yes, go ahead with next steps. If not, check for other DTC’s presence.

2. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to

earlier issue closure.

3. Check whether Load dump happened in vehicle.

4. Check whether the Vehicle is jump started with 24 V battery

5. Check whether vehicle is fitted with higher voltage rated battery

6. Is Alternator warning lamp (Battery charge Lamp) in cluster ON? Then check for alternator related issues.

7. Check whether the Alternator and its voltage regulator are working fine. If not perform necessary repairs.

Trouble Shooting:

Step Checks

IF YES

IF NO

Check for any mal-functions in Alternator / Voltage

Regulator of Alternator / Rectifiers of Alternator

Perform necessary

repairs

Go to Next Step

Check whether the Vehicle is jump started with higher

capacity battery

Convey user that

these kind of

practices shall not

be followed.

In case of any Burnt

WH or failed

controllers, Rectify /

Replace

3 Check whether the Vehicle is fitted with Battery specified

Go to Next step

Convey User that