Vehicle Platform: OSPREY ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 1.4 Date: 15 May 2018 Author: Body CoC Page: 471 of 855 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. 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:-
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