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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: 663 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.
3
Perform the Routine – Glow Plug Low Voltage test. Is the
result specifying any of the below errors:
- General electrical failure in glow plug 1
- General electrical failure in glow plug 2
- General electrical failure in glow plug 3
- General electrical failure in glow plug 4
- GCU in fault
- T30 missing
- General electrical failures in feedback line or open
circuit of command line or feedback signal not valid
- Short circuit to Vbatt in the command line
- Short circuit to Gnd of the command line
-
Perform the
rectification as per
the error returned by
EMS ECU for
routine.
Go to Next Step
4
Is there wiring harness electrical continuity between
Cylinder 2 glow plug & GPIU module connector pin G2 (in 4
pole connector), EMS pin K054 and GPIU Module
connector pin 2, GPIU Module connector pin 1 and Main
relay supply, GPIU Module connector pin 5 and Battery
supply.
Go to next step
Rectify the wiring
harness
connections as per
the circuit
schematic.
5
Check whether the GPIU module connector pin G2 (in 4
pole connector) is short-circuited to Battery / Ground.
Rectify the wiring
harness connections
as per the circuit
schematic.
Go to next step
6
Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to Next Step
7
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
8
Fault Persists.
Call Hotline
Repeat the above
steps for re-
confirmation
DTC’s confirmation:
After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM.
Perform the ‘Glow Plug Low Voltage Test’ for GPIU Module by opening the Routines tab in Service tool. Test result shall
be successful.