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: 18 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 Check oil control valve Clean the Rust or repair or replace Go to Step 2 2 Check leakage in the oil gallery Fix the leakage Go to Step 3 3 Check quantity of oil Top up the oil Go to Step 4 4 Check oil temperature If more let the engine cool down & oil temperature to reduce Go to Step 5 5 Check alignment of camshaft Fix the alignment Go to step 6 6 Is there any rust/oxidization observed on VVT actuator Terminals Clean the Rust or repair or replace Go to Step 7 7 Is there wiring harness electrical continuity between ECU pin 241 & VVT IN actuator pin 1. Go to Step 8 Establish continuity by rectifying harness connections as per the Circuit schematic 8 Are there any pins damaged at VVT actuator /EMS ecu Connector Replace the connector or wiring harness Go to step 9 9 Are there any pins backed out from the VVT Actuator/EMS ecu Connector Rectify/Replace Connectors Go to Step 10 10 Is VVT Actuator pin 241 short Circuited to GND/Battery/Open Go to Step 11 Repair the harness as per the schematic 11 Is VVT Actuator physically Damaged Replace VVT Go to Step 12 12 Are there any metallic particles/Burr in VVT actuators Tip? Clean those burr/metallic particles Go to step 13 13 Are there any faults related to VVT Actuators power supply voltages Replace these faults by following their rectification procedure Go to step 14 14 Fault Still Persists? Replace VVT Actuator 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. 1. Fuel system status 2. Engine load 3. Engine coolant temperature. 4. Long term fuel trim. 5. MAP Sensor. 6. Engine Speed. 7. Vehicle Speed. 8. Spark timing. 9. Absolute throttle position. 10. Distance Travelled after MIL ON. 11. Distance travelled since fault memory last cleared. 12. Battery voltage. Recheck the fault, fault shall not reappear.