Infiniti M35/M45 Y50. Manual — part 1038
PRE-CRASH SEAT BELT
SB-23
C
D
E
F
G
I
J
K
L
M
A
B
SB
3.
CHECK BRAKE PEDAL STROKE SENSOR HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit connector and brake pedal stroke sensor connector.
3.
Check continuity between pre-crash seat belt control unit har-
ness connector and brake pedal stroke sensor harness connec-
tor.
4.
Check continuity between pre-crash seat belt control unit harness connector and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between pre-crash seat belt control unit and brake pedal stroke sensor.
4.
CHECK BRAKE PEDAL STROKE SENSOR POWER SUPPLY
1.
Connect pre-crash seat belt control unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between pre-crash seat belt control unit harness
connector and ground.
OK or NG
OK
>> GO TO 5.
NG
>> Replace pre-crash seat belt control unit.
A
B
Continuity
Pre-crash seat
belt control unit
connector
Terminal
Brake pedal stroke
sensor connector
Terminal
B142
16
E125
1
Yes
18
2
20 3
21
4
A
Ground
Continuity
Pre-crash seat belt
control unit connector
Terminal
B142
16
No
18
20
21
PHIA1135E
Terminal
Voltage (V)
(Approx.)
(+)
(–)
Pre-crash seat
belt control unit
connector
Terminal
B142
18
Ground
5
PHIA1136E
SB-24
PRE-CRASH SEAT BELT
5.
CHECK BRAKE PEDAL STROKE SENSOR
Check continuity between brake pedal stroke sensor while perform-
ing brake operation.
OK or NG
OK
>> Check harness connection.
●
If it is OK, replace pre-crash seat belt control unit.
●
If it is NG, repair or replace malfunction part.
NG
>> Replace brake pedal stroke sensor.
Check Pre-Crash Seat Belt Motor LH Circuit [B2452]
NHS0008E
1.
CHECK SELF-DIAGNOSTIC RESULT
With CONSULT-II
Select “SELF-DIAG RESULTS” of CONSULT-II, and then make sure
that “SB MOTOR LH CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 2.
Displayed B2452?
Yes
>> GO TO 2.
No
>> Pre-crash seat belt motor LH circuit is OK.
Brake pedal stroke
sensor connector
Terminal Condition
Resistance
(K
Ω
)
(Approx.)
E125
2
1
Brake released
→
depressed
1.0
→
0.2
3
0.2
→
1.0
PHIA1137E
CONSULT-II display
CONSULT-II display code
NO DTC
—
SB MOTOR LH CIRC
B2452
PHIA0768E
PRE-CRASH SEAT BELT
SB-25
C
D
E
F
G
I
J
K
L
M
A
B
SB
2.
CHECK SEAT BELT MOTOR LH HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit connector and pre-crash seat belt motor LH connector.
3.
Check continuity between pre-crash seat belt control unit har-
ness connector and pre-crash seat belt motor LH harness con-
nector.
4.
Check continuity between pre-crash seat belt control unit har-
ness connector and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness.
3.
CHECK SEAT BELT MOTOR LH
Check continuity between pre-crash seat belt motor LH.
OK or NG
OK
>> Replace pre-crash seat belt control unit.
NG
>> Replace pre-crash seat belt motor LH.
A
B
Continuity
Pre-crash seat
belt control unit
connector
Terminal
Pre-crash seat
belt motor LH
connector
Terminal
B142
4
B32
1
Yes
6
2
A
Ground
Continuity
Pre-crash seat belt
control unit connector
Terminal
B142
4
No
6
PHIA1138E
Pre-crash seat belt
motor LH connector
Terminal Continuity
B32
1
2
Yes
PHIA1139E
SB-26
PRE-CRASH SEAT BELT
Check Pre-Crash Seat Belt Motor RH Circuit [B2451]
NHS0008F
1.
CHECK SELF-DIAGNOSTIC RESULT
With CONSULT-II
Select SELF-DIAG RESULTS” of CONSULT-II, and then make sure
that “SB MOTOR RH CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 2.
Displayed B2451?
Yes
>> GO TO 2.
No
>> Pre-crash seat belt motor RH circuit is OK.
2.
CHECK SEAT BELT MOTOR RH HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit connector and pre-crash seat belt motor RH connector.
3.
Check continuity between pre-crash seat belt control unit har-
ness connector and pre-crash seat belt motor RH harness con-
nector.
4.
Check continuity between pre-crash seat belt control unit har-
ness connector and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness.
CONSULT-II display
CONSULT-II display code
NO DTC
—
SB MOTOR RH CIRC
B2451
PHIA0767E
A
B
Continuity
Pre-crash seat
belt control unit
connector
Terminal
Pre-crash seat
belt motor RH
connector
Terminal
B142
1
B422
2
Yes
3 1
A
Ground
Continuity
Pre-crash seat belt
control unit connector
Terminal
B142
1
No
3
PHIA1140E
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