2008 INFINITI QX56 Factory Service Manual

Page 369 of 4083

INFINITI QX56 2008  Factory Service Manual BCS-4
< BASIC INSPECTION >[BCM]
INSPECTION AND ADJUSTMENT
• When replacing BCM, you must perform WRITE CONFIGURATION 
with CONSULT-III.
• Complete the procedure of WRITE CONFIGURATION in order.

Page 370 of 4083

INFINITI QX56 2008  Factory Service Manual BCS
BODY CONTROL SYSTEMBCS-5
< FUNCTION DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
FUNCTION DIAGNOSIS
BODY CONTROL SYSTEM
System DescriptionINFOID:0000000001696402
OUTLINE
• BCM (Body Control M

Page 371 of 4083

INFINITI QX56 2008  Factory Service Manual BCS-6
< FUNCTION DIAGNOSIS >[BCM]
BODY CONTROL SYSTEM
Component Parts Location
INFOID:0000000001696403
• BCM M18, M19, M20 (view wit h instrument panel removed)
LEIA0068E
Revision: March 2010 2008 Q

Page 372 of 4083

INFINITI QX56 2008  Factory Service Manual BCS
COMBINATION SWITCH READING SYSTEMBCS-7
< FUNCTION DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
COMBINATION SWITCH
 READING SYSTEM
System DiagramINFOID:0000000001696404
System DescriptionINFOID:

Page 373 of 4083

INFINITI QX56 2008  Factory Service Manual BCS-8
< FUNCTION DIAGNOSIS >[BCM]
COMBINATION SWITCH READING SYSTEM
Combination switch circuit
Combination switch INPUT-OUTPUT system list
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH R

Page 374 of 4083

INFINITI QX56 2008  Factory Service Manual BCS
COMBINATION SWITCH READING SYSTEMBCS-9
< FUNCTION DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
- The voltage waveform of INPUT corresponding to the 
formed circuit changes according to the oper

Page 375 of 4083

INFINITI QX56 2008  Factory Service Manual BCS-10
< FUNCTION DIAGNOSIS >[BCM]
COMBINATION SWITCH READING SYSTEM
• The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the
TURN RH switch and FR WIPER LOW

Page 376 of 4083

INFINITI QX56 2008  Factory Service Manual BCS
COMBINATION SWITCH READING SYSTEMBCS-11
< FUNCTION DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
1. BCM M18, M19, M20 (view with in-
strument panel removed) 2. Combination switch (lighting and