806 / 4910
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: 774 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.
- 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
-
the error returned by
EMS ECU for
routine.
4
Are there any pins damaged at EMS ECU Connector
Replace the
connector or wiring
harness
Go to Next Step
5
Are there any pins backed out from the EMS ECU
Connector
Rectify/Replace
Connectors
Go to Next Step
6
Is the ECM pin K057 short circuited to Ground / Battery.
Rectify the wiring
harness connections
as per the schematic
Go to Next Step
7
Is there wiring harness electrical continuity between ECU
pin K057 & GPIU module connector pin 3, K053 & GPIU
module connector pin 4, 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.
8
Fault Persists.
Call Hotline for
seeking advice
regarding
replacement of
GPIU Module / EMS
ECU.
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 shall be
successful.