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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: 773 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.
P263E-4B: Glow Plug Control Module Command – Glow plug relay command (over temperature)
Overview:
DTC Description (User Friendly)
Glow plug relay command (over temperature)
ECU Pin Number
K057
Customer Symptom
No Symptoms, Glow Plug Lamp ON, Under Cold climates
(below 0 degrees C), Prolonged cranking of Engine happens.
Fault Effects (On Vehicle)
Under Cold climates (below 0 degrees C), Prolonged cranking
of Engine happens
Lamp Status (If Any)
Glow Plug Lamp Flashes
Fault Detection Condition (Root cause)
The hardware detects over temperature on the PWM output
power stage for the Glow Plug Command – K057.
Normal Operating Condition
No Fault
Probable Trouble Area
Check, whether there is dis-continuity in wiring harness
between GPIU Module and EMS ECU.
GPIU Module
EMS ECU faulty
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
Glow Plug Control Module controls the operation of Glow Plugs installed on each engine cylinder. Glow
Plug Module also provides feedback to EMS ECU regarding the activation status of glow plugs, failures in glow plugs
wiring connections / GPIU module itself. EMS ECU will take rectification actions, incase GPIU reports any errors.
Glow Plugs are installed on engine cylinders to warm up the engine cylinder chamber to aid the vehicle starting and
emission control under ambient temperatures below 0 degrees.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.\
3. Check the wiring harness connections between EMS ECU and GPIU Module as per the circuit Schematic.
4. Loose/ Damaged Connections between GPIU Module and EMS ECU.
5. Loose/ Damaged Connections between GPIU Module and Battery supply or Main relay supply.
6. Check for proper installation of GPIU Module in Vehicle.
7. Check for damage of pins at EMS ECU connector and GPIU Module connector.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Check Whether the GPIU Module is installed on Vehicle
Go to Next Step
Fit GPIU Module
2
Check for any mechanical damage in GPIU Module
Replace GPIU
Module
Go to next step
3
Perform the Routine – Glow Plug Low Voltage test. Is the
result specifying any of the below errors:
Perform the
rectification as per
Go to Next Step