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OSPREY- Application
DTC Troubleshooting Data
Version: 4.0
Date: 10-02-2017
Prepared by: Mithipati Prasad
Checked by: G S Raju / Senthilnathan S
Page: 255 of 654
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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: Battery Voltage Signal – Low
Overview:
DTC Description as per ISO standard
System Voltage Low
ECU Pin Number
12, 31, 49, & 21
Customer Symptom
Engine may not start.
AC off.
Reduced torque mode active.
Battery Charge Indication in Cluster will be ON.
Fault Effects (On Vehicle)
Reduced torque mode active
Disables wiring harness resistance Pulse corrections for all
injectors.
Disabled RVD for all Injectors
Disable EGR
IMV operates without any trim correction.
High pressure leak detection test is prevented.
Rail Pressure demand value is limited to 800 bar.
Lamp Status (If Any)
CE lamp is on.
Fault Detection Condition
This DTC gets logged if the Battery voltage read by the ECU
is less than lower threshold.
Normal Operating Condition
Diagnostic tool display the value of battery voltage greater
than 6 volts at ignition ON condition
Probable Trouble Area
Battery, Alternator, ECU, Grounding points, Wiring harness.
Healing Condition
Clear the errors, Ignition OFF to ON
Battery voltage > 6 V and engine running / Engine not running
Component Details:
Lead Acid Battery provides supply voltage to all vehicle electrical and electro mechanical components
Preliminary Checks
x
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.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure. Check for pin back out at EMS ecu connector or EGR valve connector.
x
Check the battery voltage with the ignition switch on as well as voltage drop during cranking. If the voltage is too
low, then recharge the battery.
x
Check main power hold relay is working properly.
x
Check and ensure whether the battery terminals are connected properly and they are tight.
x
Check the charging circuit; Rectify the charging circuit if faulty.
x
Check ECU pin no 9 & 28 are getting ground connection and 12 & 31 are connected to battery positive
–
12 V
supply.