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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: 211 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.
P0627-13: Fuel pump relay command (open circuit)
Overview:
DTC Description as per ISO standard
Fuel pump relay command – Open Circuit
ECU Pin Number
K71
Customer Symptom
MIL ON
Fault Effects (On Vehicle)
Vehicle may not start.
Lamp Status (If Any)
MIL ON
Fault Detection Condition (Root cause)
Fuel pump relay command open circuit WH
Fuel pump relay
EMS ECU
Normal Operating Condition
No Fault Code
Probable Trouble Area
Fuel pump relay command open circuit
Wiring harness
Fuel pump relay
EMS ECU
Healing Condition
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
Fuel pump relay connected to EMS ECU, ECU drive the fuel pump relay.
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. Fuel circuit
4. Loose/ Damaged Connections between fuel pump relay command and EMS ECU.
5. Check for back out of pins at both fuel pump connector and ECU connector.
6. Check for damage of pins at both fuel pump connector and ECU connector.
7. Atmospheric pressure sensor faulty?