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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: 402 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.
B1601 - 12: Bonnet State Switch - Circuit short to Battery or Open Circuit
Overview:
ISO Code
B1601 - 12
Customer Symptom
1. Interior Roof lamp in Auto mode selection
doesn’t operate when Bonnet is opened.
2. The IC shows Bonnet as closed status, even if
the Bonnet is opened as presumed by the
customer.
3. The Mis-lock sound does not occurs on RKE
lock command.
4. The vehicle will get lock on RKE lock command.
Fault Effects (On Vehicle)
Interior Roof lamp in Auto mode selection does not
operate when Bonnet is opened.
Lamp Status (If Any)
1. Roof lamp in Auto mode selection is OFF.
2. IC shows Bonnet as closed status always
Fault Detection Condition
This fault will be logged after the input switch test
routine execution. User has to operate the switch
manually during routine. If short to battery or open
circuit fault is detected for Bonnet State Switch, then this
DTC code will be returned with the routine results.
Normal Operating Condition
There should not be any fault returned by routine
Probable Trouble Area
1. BCM connector Fault
2. Front side wiring harness Short to battery or
open circuit
3. Bonnet State Switch is damaged or stuck or
faulty
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
Bonnet State Switch, BCM connector
Functionality:
If the Bonnet State is short to Battery or Open Circuit, then the Bonnet is in closed state.
If the Bonnet is closed, then BCM shall receive the feedback of Bonnet as closed status.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting: