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

Vehicle Platform: NEXON, X4, Q5, TIGOR_MCE ECU Name: PEPS DTC Troubleshooting Data Version: 1.7 Date: 01 Aug 2019 Author: Rajasekhara Reddy Page: 154 of 389 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. B131A – 11:- Trunk Switch – circuit Short to Ground Overview:- ISO Code (DTC Code) B131A - 11 Customer Symptom Passive vehicle tailgate unlocking does not work. Fault Effects (On Vehicle) Passive vehicle tailgate unlocking does not work. Lamp Status (If Any) N.A. Fault Detection Condition 1. Permanent short circuit of trunk door handle switch. 2. Wire cut & shorting of Connector-1 / Pin-11 signal with vehicle body or together. 3. Bending of pins-11 of connector-1 and shorting to each adjacent pin. Normal Operating Condition 1. Vehicle battery voltage shall be normal. 2. Trunk door handle switch shall not be pressed continuously for more than 20 sec. 3. All doors should be closed and vehicle should be in un- lock condition. 4. Valid paired UID should be present in trunk door side and trunk DHS should be pressed. Probable Trouble Area 1. Permanent short circuit of trunk door handle switch. 2. Wire cut & shorting of Connector-1 / Pin-15 signal with vehicle body or together. 3. Bending of pins-15 of connector-1 and shorting to each adjacent pin. Healing Condition 1. After fixing short to ground fault on trunk door handle switch, passive vehicle locking should be performed from driver DHS or co-driver DHS. 2. This is need for trunk door handle switch to restore normal functioning. 3. Finally check passive trunk unlocking from trunk DHS. Table35 :- B131A-11 overview details Component Details:- 1. Trunk door handle switch 2. Trunk door handle switch assembly pick-tail. 3. PEPS ECU Preliminary Checks:- 1. Check vehicle battery voltage, it should be normal. 2. Check ECU pins for oxidation, bending or damage.