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: 675 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 4 glow plug & GPIU module connector pin G4 (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 G4 (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 reconfirmation 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.
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