Infiniti FX35, FX50 (S51). Manual — part 453
DEF-8
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
• Vehicle Condition (BCM detected condition)
IGN Counter
IGN counter indicates the number of times that ignition switch is turned ON after DTC is detected.
• The number is 0 when a malfunction is detected now.
• The number increases like 1
→
2
→
3...38
→
39 after returning to the normal condition whenever ignition
switch OFF
→
ON.
• The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
REAR WINDOW DEFOGGER
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000005249358
Data monitor
ACTIVE TEST
CONSULT screen terms
Description
SLEEP>LOCK
While turning BCM status from low power consumption mode to normal mode (Power supply
position is “LOCK”)
SLEEP>OFF
While turning BCM status from low power consumption mode to normal mode (Power supply
position is “OFF”.)
LOCK>ACC
While turning power supply position from “LOCK” to “ACC”
ACC>ON
While turning power supply position from “ACC” to “IGN”
RUN>ACC
While turning power supply position from “RUN” to “ACC” (Vehicle is stopping and selector
lever is except P position.)
CRANK>RUN
While turning power supply position from “CRANKING” to “RUN” (From cranking up the en-
gine to run it)
RUN>URGENT
While turning power supply position from “RUN“ to “ACC” (Emergency stop operation)
ACC>OFF
While turning power supply position from “ACC” to “OFF”
OFF>LOCK
While turning power supply position from “OFF” to “LOCK”
OFF>ACC
While turning power supply position from “OFF” to “ACC”
ON>CRANK
While turning power supply position from “IGN” to “CRANKING”
OFF>SLEEP
While turning BCM status from normal mode (Power supply position is “OFF”.) to low power
consumption mode
LOCK>SLEEP
While turning BCM status from normal mode (Power supply position is “LOCK”.) to low pow-
er consumption mode
LOCK
Power supply position is “LOCK” (Ignition switch OFF with steering is locked.)
OFF
Power supply position is “OFF” (Ignition switch OFF with steering is unlocked.)
ACC
Power supply position is “ACC” (Ignition switch ACC)
ON
Power supply position is “IGN” (Ignition switch ON with engine stopped)
ENGINE RUN
Power supply position is “RUN” (Ignition switch ON with engine running)
CRANKING
Power supply position is “CRANKING” (At engine cranking)
Monitor Item
Description
REAR DEF SW
This is displayed even when it is not equipped.
PUSH SW
Indicates [ON/OFF] condition of push switch.
Test Item
Description
REAR DEFOGGER
This test is able to check rear window defogger operation. Rear window defogger operates when
“ON” on CONSULT-III screen is touched.
POWER SUPPLY AND GROUND CIRCUIT
DEF-9
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
DTC/CIRCUIT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis Procedure
INFOID:0000000005249359
1.
CHECK FUSE AND FUSIBLE LINK
Check that the following fuse and fusible link are not blown.
Is the fuse blown?
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 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.
Terminal No.
Signal name
Fuse and fusible link No.
1
Battery power supply
L( 40A)
11
10 (10A)
(+)
(
−
)
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M118
1
Ground
Battery voltage
M119
11
BCM
Ground
Continuity
Connector
Terminal
M119
13
Existed
DEF-10
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER SWITCH
REAR WINDOW DEFOGGER SWITCH
Description
INFOID:0000000005249360
• The rear window defogger is operated by turning the rear window defogger switch ON.
• The indicator lamp in the rear window defogger illuminates when the rear window defogger is operating.
Component Function Check
INFOID:0000000005249361
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that the indicator lamp of rear window defogger illuminates when rear window defogger switch ON.
Is the inspection result normal?
YES
>> Rear window defogger switch function is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000005249362
1.
CHECK PRESET SWITCH
Does preset switch operate normally?
• Without navigation system. Refer to
AV-21, "On Board Diagnosis Function"
• With navigation (single monitor) system. Refer to
AV-175, "On Board Diagnosis Function"
.
• With navigation (twin monitor) system. Refer to
AV-382, "On Board Diagnosis Function"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace preset switch. Refer to
AV-149, "Removal and Installation"
(without navigation system),
AV-345, "Removal and Installation"
[with navigation (single monitor) system] or
[with navigation (twin monitor) system].
REAR WINDOW DEFOGGER RELAY
DEF-11
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
REAR WINDOW DEFOGGER RELAY
Description
INFOID:0000000005249363
Power is supplied to the rear window defogger using BCM control.
Component Function Check
INFOID:0000000005249364
1.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
1.
Perform Active Test (“REAR DEFOGGER”) using CONSULT-III.
2.
Touch “ON”.
3.
Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES
>> Rear window defogger relay power supply circuit is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000005249365
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 10A fuse [No.3, located in fuse block (J/B)].
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK REAR WINDOW DEFOGGER RELAY CIRCUIT 1
1.
Turn ignition switch ON.
2.
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES
>> Rear window defogger power supply circuit is OK.
NO
>> GO TO 3.
3.
CHECK REAR WINDOW DEFOGGER RELAY CIRCUIT 2
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector and fuse block (J/B).
3.
Check continuity between BCM harness connector and fuse block (J/B) harness connector.
4.
Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness.
(+)
(–)
Condition
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M123
151
Ground
Rear window defogger switch: ON
0
Rear window defogger switch: OFF
Battery voltage
BCM
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
M123
151
M2
4B
Existed
BCM
Ground
Continuity
Connector
Terminal
M123
151
Not existed
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