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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: 867 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.
P0562-16: System Voltage Low – Upstream main relay battery voltage below threshold
Overview:
DTC Description (User Friendly)
Upstream main relay battery voltage below 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 supply voltage less than 8 V.
Normal Operating Condition
EMS ECU input power supply voltage in range of ~ 9 – 16 V
Probable Trouble Area
Battery Deep Discharge, Alternator not functioning, Battery
poor health state
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 Battery is deeply discharged or Battery health state is very poor.
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
1.
Check for any mal-functions in Alternator / Voltage
Regulator of Alternator / Rectifiers of Alternator
Perform necessary
repairs
Go to Next Step
2
Check whether the Vehicle battery is deeply discharged /
Battery Health state is very poor
Jump Start the
Vehicle and let the
Battery charge for
some time.
Post that Turn the
Engine Off and clear
the DTC and Read
DTC & check
whether the issue
Go to next step