Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 426 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent 6 Check if the EMS ECU pin A61 is short circuit to ground/battery or open circuit? Do the necessary repair Go to Step 7 7 Check if the resistance between the EMS ECU pins A61 & A18 are as per design specifications for different switch positions (No switch press ~ 9080 Ohm, Master ON/OFF ~ 240 Ohm, Cancel ~ 630 Ohm and Set ~ 2880 Ohm & Resume ~ 1380) is ok? Go to Step 8 Do the necessary repair (clock spring/wiring harness etc.) 8 Check if the problem still persists? Replace cruise switch on steering wheel Go to Step 9 9 Check if the problem still persists? Call Hot Line Follow the steps again for reconfirmation DTC’s Confirmation: 1. After rectification read the DTCs using the diagnostic tool by operating different cruise switch states (No switch press, Master ON/OFF, Cancel, Set & Resume) 2. If error present, then rectify the errors 3. Confirm that there are no DTCs present before the vehicle is handed over to customer Circuit Schematic Diagram:
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