2019 / 4910
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
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TATA MOTORS Ltd.
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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 Off
On
Off
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:-