TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

TATA BSVI Gasoline Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.2 Date: 18-12-2019 Prepared By: Sunita Mandlik Checked By: Yeshwant Jadhav Approved By: Satish Kumar Document Part No: 2921 02 xxx xxxx Page: 929 of 1498 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. Trouble Shooting:- Step Checks IF YES IF NO 1. Is there any rust/oxidization observed on Pedal Sensor A/B Terminals Clean the Rust or repair or replace Go to Step 2 2. Is there wiring harness electrical continuity between ECUpins 121,138, 105 &Accelerator pedal Sensor 1 Sensor connector pins 4,2,3. Go to Step 3 Establish continuity by rectifying harness connections as per the Circuit schematic 3. Is there wiring harness electrical continuity between ECUpins 111,126, 106 &Accelerator pedal Sensor 2 Sensor connector pins 6,1,5. Go to Step 4 Establish continuity by rectifying harness connections as per the Circuit schematic 4. Are there any pins damaged at Pedal Sensor 1/2 /EMS ECU Connector Replace the connector or wiring harness Go to step 5 5 Are there any pins backed out from the Pedal Sensor 1/2 /EMS ECU Connector Rectify/Replace Connectors Go to Step 6 6 Is Pedal Sensor 2 Sensor Supply Pin 126, Pedal Sensor 1 supply pin 138 Short Circuited to GND/Battery. Repair the harness as per the schematic Go to step 7 7 Is pedal Sensor 2 Signal Pin111, pedal Sensor 1 Signal Pin 121 Short Circuited to GND. Repair the harness as per the schematic Go to Step 8 8 Is Pedal Sensor 1/2 physically Damaged Replace Sensor Go to Step 9 9 Fault Still Persists? Replcae Sensor A /B and then Fault still persists then Replace EMS ECU Follow the steps again for reconfirmation DTC’s confirmation:- After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. Run the vehicle above 50 kmph and check the fault / DTC. Fault should not reappear.