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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: 129 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.
START
Connect Diagnostic tool and Run Input Test Routine and operate the
switches as mentioned in the input switch test routine specification.
Is DTC B221A-12 logged by
Routine?
Disconnect vehicle battery connection.
(Please follow the safety guidelines)
Check BCM and
Combiswitch connectors for
terminal backout
Are connectors loose?
1.Remove BCM Connectors.
2.Perform visual check of connectors for pins bent or damaged etc.
Is connector
faulty?
Check continuity between BCM mating connector pin
[ C1-
4
]
(Harness side) with
battery
[C3-2/C3-1]
Continuity Found?
1. Remove Combiswitch mating connector
2. Check continuity between BCM mating connector pin
[ C1-4
] and HeadlampON
contact at combiswitch mating connector (harness side)
(Please refer Circuit
schematic / combiswitch drawings)
STOP
YES
NO
YES
NO
Reconnect connectors firmly
Correct connector fault
(Terminals Bend)
YES
NO
Correct BCM mating connector Side
wiring harness
(Short to Battery)
NO
YES
B221A – 12: HeadLampON signal – Circuit Short To Battery
A
B