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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: 386 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.
P1D56-04: Serial Peripheral Interface communication (system internal failures)
DTC Description as per ISO standard
ECU internal monitoring 5- Internal Electronic failure
ECU Pin Number
Customer Symptom
MIL ON
Fault Effects (On Vehicle)
Vehicle may not start
Lamp Status (If Any)
MIL ON1 (Lamp turn On immediately when fault detected)
Fault Detection Condition (Root cause)
Ignition ON
Normal Operating Condition
Fault condition no more present
Probable Trouble Area
EMS ECU
Healing Condition
1. Run the diagnostic procedures to check the ECU Power &
ground.
2. Check the integrity of the ECU pins of the ECU, if the fault
still occurs, replace the ECU and reprogram the controller
Component Details:
EMS ECU is an electronic controller which controls the Engine functionality by interfacing with various sensors, actuators
And other controllers (via CAN).
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above.
2. If yes, go ahead with next steps. If not, check for other DTC’s presence.
3. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
4. Earlier issue closure. Check for pin back out at EMS ecu connector.
5. Check whether the EMS is receiving Battery supply and Ground
6. Check whether the Battery is healthy.