Infiniti G37 Coupe. Manual — part 230
BCS-38
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000001612414
1.
CHECK FUSE AND FUSIBLE LINK
Check that the following fuse and fusible link are not blown.
Is the fuse fusing?
YES
>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is
blown.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connectors.
3.
Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
Signal name
Fuse and fusible link No.
Battery power supply
K
10
Terminals
Voltage
(Approx.)
(+)
(
−
)
BCM
Ground
Connector
Terminal
M118
1
Battery voltage
M119
11
BCM
Ground
Continuity
Connector
Terminal
M119
13
Existed
BCS
COMBINATION SWITCH INPUT CIRCUIT
BCS-39
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH INPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000001612415
1.
CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1.
Turn the ignition switch OFF.
2.
Disconnect the BCM and combination switch connectors.
3.
Check continuity between BCM harness connector and combination switch harness connector.
Does continuity exist?
YES
>> GO TO 2.
NO
>> Repair the harnesses or connectors.
2.
CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Repair the harnesses or connectors.
NO
>> GO TO 3.
3.
CHECK BCM OUTPUT VOLTAGE
1.
Connect the BCM connector.
2.
Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES
>> GO TO 4.
NO
>> Replace BCM.
System
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
INPUT 1
M122
107
M33
11
Existed
INPUT 2
109
9
INPUT 3
88
7
INPUT 4
108
10
INPUT 5
87
13
System
BCM
Ground
Continuity
Connector
Terminal
INPUT 1
M122
107
Not existed
INPUT 2
109
INPUT 3
88
INPUT 4
108
INPUT 5
87
System
Terminals
Voltage
(Approx.)
(+)
(
−
)
BCM
Ground
Connector
Terminal
INPUT 1
M122
107
Refer to
.
INPUT 2
109
INPUT 3
88
INPUT 4
108
INPUT 5
87
BCS-40
< COMPONENT DIAGNOSIS >
COMBINATION SWITCH INPUT CIRCUIT
4.
CHECK BCM INPUT SIGNAL
1.
Connect the combination switch connector.
2.
Turn ON any switch in the system that is malfunctioning.
3.
Check voltage between BCM harness connector and ground.
Is the measurement value normal when any of the switches is turned ON?
YES
>> Replace BCM.
NO
>> Replace the combination switch.
Special Repair Requirement
INFOID:0000000001612416
1.
REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to CONSULT-III operation manual NATS-IVIS/NVIS.
>> Work end.
System
Terminals
Voltage
(Approx.)
(+)
(
−
)
BCM
Ground
Connector
Terminal
INPUT 1
M122
107
Refer to
INPUT 2
109
INPUT 3
88
INPUT 4
108
INPUT 5
87
BCS
COMBINATION SWITCH OUTPUT CIRCUIT
BCS-41
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH OUTPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000001612417
1.
CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1.
Turn the ignition switch OFF.
2.
Disconnect the BCM and combination switch connectors.
3.
Check continuity between BCM harness connector and combination switch harness connector.
Does continuity exist?
YES
>> GO TO 2.
NO
>> Repair the harnesses or connectors.
2.
CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Repair the harnesses or connectors.
NO
>> GO TO 3.
3.
CHECK COMBINATION SWITCH OUTPUT VOLTAGE
1.
Connect the combination switch connector.
2.
Turn ON any switch in the system that is malfunctioning.
3.
Check voltage between combination switch harness connector and ground.
System
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
OUTPUT 1
M123
143
M33
12
Existed
OUTPUT 2
144
14
OUTPUT 3
145
5
OUTPUT 4
146
2
OUTPUT 5
142
8
System
BCM
Ground
Continuity
Connector
Terminal
OUTPUT 1
M123
143
Not existed
OUTPUT 2
144
OUTPUT 3
145
OUTPUT 4
146
OUTPUT 5
142
System
Terminals
Value (Approx.)
(+)
(
−
)
Combination switch
Ground
Connector
Terminal
OUTPUT 1
M33
12
1.4 V
OUTPUT 2
14
OUTPUT 3
5
OUTPUT 4
2
OUTPUT 5
8
JPMIA0041GB
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