Nissan Note E12. Instruction — part 463
MWI-38
< DTC/CIRCUIT DIAGNOSIS >
B2268 WATER TEMP
B2268 WATER TEMP
Description
INFOID:0000000009549382
The engine coolant temperature signal is transmitted from ECM to the combination meter via CAN communi-
cation.
DTC Logic
INFOID:0000000009549383
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009549384
1.
PERFORM SELF-DIAGNOSIS OF ECM
Perform Self Diagnostic Result of ECM, and repair or replace malfunctioning parts.
>> Refer to
.
DTC
Display Item
Malfunction detected condition
Possible malfunction
B2268
WATER TEMP METER
[B2268]
ECM continuously transmits abnormal engine coolant
temperature signals for 60 seconds or more
• Engine coolant temperature sensor
• ECM
MWI
POWER SUPPLY AND GROUND CIRCUIT
MWI-39
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
POWER SUPPLY AND GROUND CIRCUIT
COMBINATION METER
COMBINATION METER : Diagnosis Procedure
INFOID:0000000009549348
Regarding Wiring Diagram information, refer to
.
1.
CHECK FUSE
Check that the following fuses are not blown.
Is the fuse blown?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
POWER SUPPLY CIRCUIT CHECK
1. Disconnect combination meter connector.
2. Check voltage between combination meter harness connector M24, terminals 27, 28, 15 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connector.
3.
GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter harness connector M24, terminals 21, 22, 23 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness or connector.
BODY CONTROL SYSTEM
Power source
Fuse No.
Battery
8
Ignition switch ON or START
3
Ignition switch ACC or ON
18
Terminals
Ignition switch position
(+)
(–)
OFF
ACC
ON
START
Connector
Terminal
M24
27
Ground
Battery voltage
Battery voltage
Battery
voltage
Battery voltage
28
0V
0V
Battery
voltage
Battery voltage
15
0V
Battery voltage
Battery
voltage
0V
Terminals
Continuity
(+)
(–)
Connector
Terminal
M24
21
Ground
Yes
22
23
MWI-40
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
BODY CONTROL SYSTEM : Diagnosis Procedure
INFOID:0000000009643044
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. Disconnect BCM connector M99.
2. Check voltage between BCM connector M99 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 M99 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair harness or connector.
Terminal No.
Signal name
Fuses and fusible link No.
57
Battery power supply
12 (10A)
70
G (40A)
BCM
Ground
Voltage
Connector
Terminal
M99
57
—
Battery voltage
70
BCM
Ground
Continuity
Connector
Terminal
M99
67
—
Yes
MWI
FUEL LEVEL SENSOR SIGNAL CIRCUIT
MWI-41
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
FUEL LEVEL SENSOR SIGNAL CIRCUIT
Description
INFOID:0000000009549351
The fuel level sensor unit and fuel pump detects the approximate fuel level in the fuel tank and transmits the
fuel level signal to the combination meter.
Component Function Check
INFOID:0000000009549352
1.
COMBINATION METER INPUT SIGNAL
1. Select METER/M&A on CONSULT.
2. Using FUEL METER of DATA MONITOR, compare the DATA MONITOR value with the fuel gauge posi-
tion.
Does monitor value match fuel gauge reading?
YES
>> Inspection End.
NO
>> Replace combination meter. Refer to
MWI-48, "Removal and Installation"
Diagnosis Procedure
INFOID:0000000009549353
Regarding Wiring Diagram information, refer to
.
1.
CHECK HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor con-
nection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace terminals or connectors.
2.
CHECK FUEL LEVEL SENSOR UNIT CIRCUIT
1. Disconnect combination meter harness connector M24 and fuel level sensor unit and fuel pump harness
connector B44.
2. Check continuity between combination meter harness connector M24 terminal 6 and fuel level sensor unit
and fuel pump harness connector B44 terminal 2.
3. Check continuity between fuel level sensor unit and fuel pump harness connector B44 terminal 2 and
ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
Fuel gauge indication position
Reference value of data monitor [L]
1
Approx. 39.7
3/4
Approx. 32.9
1/2
Approx. 22.7
1/4
Approx. 11.9
0
Approx. 2.7
Connector
Terminal
Connector
Terminal
Continuity
M24
6
B44
2
Yes
Connector
Terminal
Ground
Continuity
B44
2
No
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