TATA BSVI Gasoline_Bifuel Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.9 Date: 24-01-2022 Prepared By: Veer K. Singh / Prudhvi B Varma Checked By: Yeshwant Jadhav Approved By: Sanjeev M. Document Part No: 2921 02 xxx xxxx Page: 1648 of 1692 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. P1C04-81: Invalid Serial Data received from Transmission control unit-Gear Shift lever Plausibility Check Overview: ISO Code P1C04- 81 Customer Symptom Poor Drivability or TCU functionality will not work. Fault Effects (On Vehicle) Poor Drivability or TCU functionality Gear Shifting, Clutch Control may not work. Lamp Status (If Any) Nil Fault Detection Condition TCU functionality wont be working properly. Normal Operating Condition TCU functioning properly Probable Trouble Area DCT ECU Faulty. Healing Condition Same Drive cycles Component Details: NA Preliminary Checks: CAN line connected to TCU. Trouble Shooting: - Step Checks IF YES IF NO 1. Check CAN line Connections to TCU. Go to Step 2 Establish continuity by rectifying CAN connections as per the circuit schematic 2 Fault Still Persists? TCU Faulty Follow the steps again for reconfirmation DTC’s Healing Confirmation: - After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. Flow Chart: -
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