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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: 388 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.
B1620 - 11: Other Doors Switch - Circuit Short to Ground
START
Connect Diagnostic tool and Run Input Test Routine and operate the
switches as mentioned in the input switch test routine specification.
Is DTC B1620 – 11
logged by Routine?
Disconnect vehicle battery connection.
(Please follow the safety guidelines)
Check connection between BCM and
Other Doors switch
Are connectors
loose?
Correct connector fault
(Terminals Bend)
1.Remove BCM Connector.
2.Perform visual check of connectors for pins bent or damaged
Is connector faulty?
STOP
1. Close all doors
2. Check continuity between BCM connector pin
[C1-14]
Harness side) with Ground
[C1-34/C1-47]
Continuity Found?
1. Remove Other Doors Switch mating connector
2.Perform visual check of connectors for pin bend or damaged etc.
Reconnect connectors firmly
Connector
Faulty?
Correct Connector fault
(Terminal Bend)
NO
YES
YES
NO
YES
YES
YES
NO
NO
NO
Check if Other Doors switch inputs[wiring harness
side] are shorted to ground
[C102-1, C104-1, C105-1].
Check the switch inputs one at a time.
Correct
Other Doors switch side wiring
harness
(Short to Ground)
1. Close and Open the Other Doors
2. Check if Other Doors switch is operating?
Is Other Doors switch
is operating?
Reconnect all connectors firmly
NO
YES
Correct BCM side wiring harness
( Short to Ground)
Continuity Found?
YES
NO
NO
Connect battery and other connectors of BCM ECU, if disconnected.
BCM ECU Faulty
Replace BCM ECU