2009 INFINITI QX56 Factory Service Manual

Page 409 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS
COMBINATION SWITCH OUTPUT CIRCUITBCS-35
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
COMBINATION SWITCH OUTPUT CIRCUIT
Diagnosis ProcedureINFOID:0000000003776416
1. CHECK OUTPUT 1

Page 410 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS-36
< COMPONENT DIAGNOSIS >[BCM]
COMBINATION SWITCH
COMBINATION SWITCH
DescriptionINFOID:0000000003776418
COMBINATION SWITCH MATRIX
Combination switch consists of INPUT circuit and OUTPUT circuit.

Page 411 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS
COMBINATION SWITCHBCS-37
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
NO >> GO TO 3
3. CHECK SWITCH BASE
 (SPIRAL CABLE)
Check operation with normal switch base (spiral cable) inst

Page 412 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS-38
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000003776420
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status

Page 413 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS
BCM (BODY CONTROL MODULE)BCS-39
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
HEADLAMP SW1
Headlamp switch OFF OFF
Headlamp switch 1st ON
HEADLAMP SW2 Headlamp switch OFF OFF
Headlamp swi

Page 414 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS-40
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
Terminal Layout
INFOID:0000000003776421
Physical ValuesINFOID:0000000003776422
LIIA2443E
Revision: December 20092009 QX56

Page 415 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS
BCM (BODY CONTROL MODULE)BCS-41
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
Te r m i n a l
Wire 
color Signal name Signal 
input/
output Measuring condition
Reference value or waveform

Page 416 of 4171

INFINITI QX56 2009  Factory Service Manual 
BCS-42
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
19 V/WRemote keyless entry 
receiver (power sup-
ply) Output OFF Ignition switch OFF
20 G/W Remote keyless entry 
receiver (signal) Input OFFSt