Nissan Altima L32. Instruction — part 127
BCS-42
< COMPONENT DIAGNOSIS >
[BCM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000004202272
1.
CHECK FUSE AND FUSIBLE LINK
Check if the following BCM fuse or fusible link are blown.
Is the fuse or fusible link blown?
YES
>> Replace the blown fuse or fusible link after repairing the affected circuit.
NO
>> GO TO 2
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement normal?
YES
>> GO TO 3
NO
>> Repair or replace harness.
3.
CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Inspection End.
NO
>> Repair or replace harness.
Special Repair Requirement
INFOID:0000000004202273
1.
REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to
BCS-6, "CONFIGURATION (BCM) : Special Repair Requirement"
>> Work End.
Terminal No.
Signal name
Fuse and fusible link No.
1
Battery power supply
H
11
10
Terminals
Voltage
(Approx.)
(+)
(
−)
BCM
Ground
Connector
Terminal
M16
1
Battery voltage
M17
11
ALCIA0025ZZ
BCM
Ground
Continuity
Connector
Terminal
M17
13
Yes
ALCIA0024ZZ
BCS
COMBINATION SWITCH INPUT CIRCUIT
BCS-43
< COMPONENT DIAGNOSIS >
[BCM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH INPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000004202274
1.
CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect the BCM and combination switch.
3. Check continuity between BCM harness connector and combi-
nation switch harness connector.
Does continuity exist?
YES
>> GO TO 2
NO
>> Repair or replace harness.
2.
CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Repair or replace harness.
NO
>> GO TO 3
3.
CHECK BCM OUTPUT VOLTAGE
1. Connect the BCM.
2. Check voltage between BCM harness connector and ground.
Is the measurement normal?
YES
>> GO TO 4
System
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
INPUT 1
M19 (A)
95
M28 (B)
11
Yes
INPUT 2
97
9
INPUT 3
76
7
INPUT 4
96
10
INPUT 5
75
13
ALMIA0102ZZ
System
BCM
Ground
Continuity
Connector
Terminal
INPUT 1
M19
95
No
INPUT 2
97
INPUT 3
76
INPUT 4
96
INPUT 5
75
ALMIA0103ZZ
System
Terminals
Voltage
(Approx.)
(+)
(-)
BCM
Ground
Connector
Terminal
INPUT 1
M19
95
Refer to
.
INPUT 2
97
INPUT 3
76
INPUT 4
96
INPUT 5
75
ALMIA0104ZZ
BCS-44
< COMPONENT DIAGNOSIS >
[BCM]
COMBINATION SWITCH INPUT CIRCUIT
NO
>> Replace BCM. Refer to
BCS-96, "Removal and Installation"
4.
CHECK BCM INPUT SIGNAL
1. Connect the combination switch.
2. Turn ON any switch in the system that is malfunctioning.
3. Check voltage between BCM harness connector and ground.
Is the measurement normal when any of the switches is turned ON?
YES
>> Replace BCM. Refer to
BCS-96, "Removal and Installation"
NO
>> Replace the combination switch. Refer to
WW-121, "Removal and Installation"
.
Special Repair Requirement
INFOID:0000000004202275
1.
REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to
BCS-6, "CONFIGURATION (BCM) : Special Repair Requirement"
>> Work End.
System
Terminals
Voltage
(Approx.)
(+)
(-)
BCM
Ground
Connector
Terminal
INPUT 1
M19
95
Refer to
.
INPUT 2
97
INPUT 3
76
INPUT 4
96
INPUT 5
75
ALMIA0104ZZ
BCS
COMBINATION SWITCH OUTPUT CIRCUIT
BCS-45
< COMPONENT DIAGNOSIS >
[BCM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH OUTPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000004202276
1.
CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect the BCM and combination switch.
3. Check continuity between BCM harness connector and combi-
nation switch harness connector.
Does continuity exist?
YES
>> GO TO 2
NO
>> Repair or replace harness.
2.
CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Repair or replace harness.
NO
>> GO TO 3
3.
CHECK COMBINATION SWITCH OUTPUT VOLTAGE
1. Connect the BCM and combination switch.
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
M18 (A)
51
M28 (B)
12
Yes
OUTPUT 2
52
14
OUTPUT 3
53
5
OUTPUT 4
54
2
OUTPUT 5
50
8
ALMIA0105ZZ
System
BCM
Ground
Continuity
Connector
Terminal
OUTPUT 1
M18
51
No
OUTPUT 2
52
OUTPUT 3
53
OUTPUT 4
54
OUTPUT 5
50
ALMIA0106ZZ
ALMIA0107ZZ
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