Q5/X451 FATC DTC Troubleshooting Data Version: 1.0 Date: 16-Oct-2018 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. Author: ERC Page: 116 of 202 Note - ECON Request Button is not applicable for Q5. B1F35-23:- ECON Request Button-Signal Stuck Low Overview:- ISO Code B1F35 – 23 Customer Symptom ECON Request Button cannot be manually selected Fault Effects (On Vehicle) ECON Request Button is stuck and cannot be change ON to OFF or Vice versa. Also ECON LED status is not changing Lamp Status (If Any) If ECON was active, ECON functionality is deactivated due to AC single key press. If ECON was deactivated during key jam action, ECON will not be reactivated. Fault Detection Condition ECON Request Button -Signal Stuck Low Normal Operating Condition The mode can be changed by pressing ECON Request Button. Probable Trouble Area Mode switch component failure. Healing Condition Check and lubricate switch, replace control panel Component Details: (X451 CCH) ECON Button is shown in above image. This button used to change the ECON mode. Preliminary Checks: Switch On the IGN & perform the following check. 1) Connect the Diagnostics tool & check the DTC fault code 2) If the fault code exists, refer the corrective actions
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