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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: 524 of 737
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 B223B - 12 logged
by Routine?
Disconnect vehicle battery connection.
(Please follow the safety guidelines)
Check BCM and combi switch connectors
for terminal backout
Are connectors loose?
1.Remove BCM Connector.
2.Perform visual check of connectors for pins bent or damaged etc.
Is connector faulty?
1.Put combi switch in OFF state.
2.Check continuity between BCM connector pin [C1-12] with battery
[C3-2/
C3-1]
Continuity Found?
1.Remove Combi Switch mating connector
2. Check continuity between BCM harness side connector pin [C1-12] and Rear Washer
contact at combi switch
[pin details TBD].
Open Circuit?
Perform the visual check of connectors for pin bend or damaged etc.
Is connector faulty?
Check continuity at combi switch Rear washer contact
[ pin details TBD]
with ground
[ pin details TBD]
Continuity found?
BCM ECU Faulty
STOP
YES
NO
YES
NO
Reconnect connectors firmly
Correct connector fault
(Terminals Bend)
YES
NO
Correct BCM Side wiring harness
(Short to Battery)
NO
YES
Correct wiring harness
(Open Circuit)
YES
NO
Correct connector fault
(Terminal Bend)
Correct connector fault at combi
switch mating connector
(Open Circuit)
YES
NO
YES
NO
Replace BCM ECU
1. Connect combi switch mating connector
2. Put combi switch at Rear washer switch contact
3. check continuty between combi switch Rear washer switch contact
[ pin details
TBD]
with ground
[ pin details TBD]
Continuity found?
YES
Combi switch fault .
Replace combi switch
NO
B223B - 12: Rear Washer Switch - circuit short to battery or open