Nissan Sentra. Instruction — part 137
BCS-118
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT INTELLIGENT KEY SYSTEM]
U1000 CAN COMM
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM
Description
INFOID:0000000009757391
LAN-7, "CAN COMMUNICATION SYSTEM : System Description"
.
DTC Logic
INFOID:0000000009757392
DTC DETECTION LOGIC
NOTE:
U1000 can be set if a module harness was disconnected and reconnected, perhaps during a repair. Confirm
that there are actual CAN diagnostic symptoms and a present DTC by performing the Self Diagnostic Result
procedure.
Diagnosis Procedure
INFOID:0000000009757393
1.
PERFORM SELF DIAGNOSTIC RESULT
1. Turn ignition switch ON and wait for 2 second or more.
2. Check “SELF- DIAG RESULTS”.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Perform CAN Diagnosis as described in DIAGNOSIS section of CONSULT Operation Instruction.
NO
>> Refer to
GI-39, "Intermittent Incident"
.
CONSULT Display
DTC Detection Condition
Possible Cause
CAN COMM CIRCUIT
[U1000]
When any listed module cannot communicate
with CAN communication signal continuously for
2 seconds or more with ignition switch ON
In CAN communication system, any item (or
items) of the following listed below is malfunc-
tioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (IPDM E/R)
BCS
U1010 CONTROL UNIT (CAN)
BCS-119
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
U1010 CONTROL UNIT (CAN)
DTC Logic
INFOID:0000000009757394
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009757395
1.
REPLACE BCM
When DTC “U1010” is detected, replace BCM.
>> Replace BCM. Refer to
BCS-126, "Removal and Installation"
.
CONSULT Display
DTC Detection Condition
Possible Cause
CONTROL UNIT (CAN)
[U1010]
BCM detected internal CAN communication cir-
cuit malfunction.
BCM
BCS-120
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000009757396
Regarding Wiring Diagram information, refer to
1.
CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse 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 connectors.
3. Check voltage between BCM connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK GROUND CIRCUIT
Check continuity between BCM connector and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair harness or connector.
Terminal No.
Signal name
Fuses and fusible link No.
63
Battery power supply
12 (10A)
70
G (40A)
11
Ignition switch ACC or ON
18 (10A)
BCM
Ground
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M20
63
Battery voltage
Battery voltage
Battery voltage
70
M21
11
—
0 V
Battery voltage
Battery voltage
BCM
Ground
Continuity
Connector
Terminal
M20
65
—
Yes
BCS
COMBINATION SWITCH INPUT CIRCUIT
BCS-121
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH INPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000009757397
Regarding Wiring Diagram information, refer to
.
1.
CHECK INPUT 1 - 5 CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM and combination switch connectors.
3. Check continuity between BCM connector and combination switch connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connectors.
2.
CHECK INPUT 1 - 5 CIRCUIT FOR SHORT
Check for continuity between BCM connector and ground.
Is the inspection result normal?
YES
>> Repair harness or connectors.
NO
>> GO TO 3.
3.
CHECK BCM OUTPUT VOLTAGE
1. Connect BCM connector.
2. Check voltage between BCM connector and ground.
Combination switch
signal
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
INPUT 1
M21
36
M28
11
Yes
INPUT 2
35
9
INPUT 3
34
7
INPUT 4
33
10
INPUT 5
32
13
Combination switch
signal
BCM
Ground
Continuity
Connector
Terminal
INPUT 1
M21
36
No
INPUT 2
35
INPUT 3
34
INPUT 4
33
INPUT 5
32
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