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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: 443 of 737
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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.
B1F00 – 11: Accessory Delay Signal – Circuit Short to Ground
Overview:
ISO Code (DTC Code)
B1F00 - 11
Customer Symptom
Power windows will not operate in Accessory power mode
input.
Fault Effects (On Vehicle)
Power windows will not operate in Accessory power mode
input.
Lamp Status (If Any)
NA
Fault Detection Condition
This fault gets logged by BCM when accessory delay output
is shorted to ground.
Normal Operating Condition
Power windows will operate in Accessory power mode input.
Probable Trouble Area
1. BCM connector wired wrong
2. Cockpit harness wire shorted to ground
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
Accessory power mode input switch is part of Ignition switch and interfaced to the BCM. If the Accessory power mode
input switch is activated and power windows functionality will work through accessory delay output. If user put the ignition
switch to Accessory power mode input position, power windows functionality will work.
Accessory Delay Signal is active high.
Preliminary Checks:
1. Check Battery Voltage (9V-16V)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-