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Vehicle Platform: OSPREY
ECU Name: Hella Body Control Module (BCM) DTC
Troubleshooting Data
Version: 1.4
Date: 15 May 2018
Author: Body CoC
Page: 803 of 855
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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.
B1326 - 12: Express down output - Circuit short to Battery
Overview:
ISO Code
B1326 - 12
Customer Symptom
Window Down will not operate.
Fault Effects (On Vehicle)
Window Down will not operate.
Lamp Status (If Any)
N.A.
Fault Detection Condition
Window Down function does not operate when Down
switch is pressed.
Normal Operating Condition
Window down function start working only on user
request.
Probable Trouble Area
1. BCM connector Fault
2. Wiring harness Short to battery or open circuit
3. Express Down switch is damaged or stuck or
faulty
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
If Down Switch is pressed then BCM shall provide the pulse to start the window down movement.
Preliminary Checks:
3. Check Battery Voltage (12.5 V & above)
4. Check ECU pins for oxidation, bending & damage.
Trouble Shooting: