Vehicle Platform: Tiago,Tigor & Osprey ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 2.0 Date: 22-10-2018 Author: Parag K Page: 676 of 737 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. B1325 – 23: Express down_Switch – Signal Stuck Low Overview: ISO Code B1325 - 23 Customer Symptom Window Up/Down will not operate. Fault Effects (On Vehicle) Window Up/Down will not operate. Lamp Status (If Any) NA Fault Detection Condition This fault gets logged by BCM; if signal stuck low condition is detected for express down switch. Normal Operating Condition If the IGN is ON then window up and down operation shall happen immediately after pressing the express down switch. Probable Trouble Area 1. BCM connector Fault 2. Express down switch input wire Short to ground 3. Switch damaged or stuck 4. BCM ECU fault Healing Condition 1. Ignition OFF ON 2. Operate express down switch from OffOnOff 3. Clear DTC Command Component Details: Window up and down operation happens immediately after pressing the express down switch. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-
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