Infiniti Q45. Manual — part 787
PRE-CRASH SEAT BELT
SB-27
C
D
E
F
G
I
J
K
L
M
A
B
SB
Check Seat Belt Buckle Switch (Driver Side) Circuit
NHS0003Z
1.
CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
With CONSULT-II
Select “SB SW LH SIG” on DATA MONITOR screen, and then make sure that ON/OFF display changes syn-
chronized with the insertion operation to the seat belt buckle.
Without CONSULT-II
1.
Turn the ignition switch ON.
2.
Check voltage between seat belt buckle switch (driver side) har-
ness connector and ground.
OK or NG
OK
>> Seat belt buckle switch (driver side) circuit is OK.
NG
>> GO TO 2.
2.
CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) HARNESS
1.
Turn the ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit connector.
3.
Check continuity between pre-crash seat belt control unit har-
ness connector B318 terminal 10 and seat belt buckle switch
(driver side) harness connector B150 terminal 41.
4.
Check continuity between pre-crash seat belt control unit har-
ness connector B318 terminal 10 and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness.
SB SW LH SIG
When passenger seat belt is not fastened
: OFF
When passenger seat belt is fastened
: ON
PHIA0765E
Connector
Terminal
Condition
Voltage [V]
(Approx.)
(+)
(–)
B150
41 (L/B)
Ground
When seat belt is not fastened
0
When seat belt is fastened
5
PHIA0746E
10 (G/W) - 41 (L/B)
: Continuity should exist.
10 (G/W) - Ground
: Continuity should not exist.
PHIA0747E
SB-28
PRE-CRASH SEAT BELT
3.
CHECK LH SEAT BELT SWITCH
Check continuity between seat belt buckle switch (driver side) B150
terminals 41 and 15A while performing the insertion operation to the
seat belt buckle.
OK or NG
OK
>> GO TO 4.
NG
>> Replace seat belt buckle switch (driver side).
4.
CHECK LH SEAT BELT SWITCH GROUND CIRCUIT HARNNES
Check continuity between seat belt buckle switch (driver side) har-
ness connector B150 terminal 15A and ground.
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
>> Repair or replace harness.
Check Seat Belt Buckle Switch (Passenger Side) Circuit
NHS00040
1.
CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
With CONSULT-II
Select “SB SW RH SIG” on DATA MONITOR screen, and then make
sure that ON/OFF display changes synchronized with the insertion
operation to the seat belt buckle.
Without CONSULT-II
1.
Turn the ignition switch ON.
2.
Check voltage between seat belt buckle switch (passenger side)
harness connector and ground.
OK or NG
OK
>> Seat belt buckle switch (passenger side) circuit is OK.
NG
>> GO TO 2.
Connector
Terminal
Condition
Continuity
B150
41 15A
When seat belt is not fastened
Yes
When seat belt is fastened
No
PHIA0748E
15A (B) - Ground
: Continuity should not exist.
PHIA0749E
SB SW RH SIG
When RH seat belt is not fastened
:OFF
When RH seat belt is fastened
:ON
PHIA0764E
Connector
Terminal
(Wire color)
Condition
Voltage [V]
(Approx.)
(+)
(–)
B350
41 (SB)
Ground
When seat belt is not fastened
0
When seat belt is fastened
5
PHIA0746E
PRE-CRASH SEAT BELT
SB-29
C
D
E
F
G
I
J
K
L
M
A
B
SB
2.
CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit connector.
3.
Check continuity between pre-crash seat belt control unit har-
ness connector B318 terminal 8 and seat belt buckle switch
(passenger side) harness connector B350 terminal 41.
4.
Check continuity between pre-crash seat belt control unit har-
ness connector B318 terminal 8 and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness.
3.
CHECK RH SEAT BELT SWITCH
Check continuity between seat belt buckle switch (passenger side)
B350 terminals 41 and 14 while performing the insertion operation to
the seat belt buckle.
OK or NG
OK
>> GO TO 4.
NG
>> Replace seat belt buckle (passenger side).
4.
CHECK RH SEAT BELT SWITCH GROUND CIRCUIT HARNNES
Check continuity between seat belt buckle switch (passenger side)
harness connector B350 terminal 14 and ground.
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
>> Repair or replace harness.
8 (SB) - 41 (SB)
: Continuity should exist.
8 (SB) - Ground
: Continuity should not exist.
PHIA0750E
Connector
Terminal
Condition
Continuity
B350
41 14
When seat belt is not fastened
Yes
When seat belt is fastened
No
PHIA0751E
14 (B) - Ground
: Continuity should exist.
PHIA0752E
SB-30
PRE-CRASH SEAT BELT
Check Brake Pedal Stroke Sensor Circuit [B2453]
NHS00041
1.
INSPECTION WITH CONSULT-II
With CONSULT-II
Select “SELF-DIAG RESULTS”, and then make sure that “BR
STROKE SEN CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 2.
Displayed B2453?
Yes
>> GO TO 3.
No
>> GO TO 2.
2.
CHECK PRE-CRASH SEAT BELT CONTOROL UNIT INPUT SIGNAL
With CONSULT-II
Select “B PEDAL SIG1” and “B PEDAL SIG2”, and then make sure that the voltage changes synchronized
with brake pedal operation.
Without CONSULT-II
1.
Turn the ignition switch ON.
2.
Check voltage between pre-crash seat belt control unit harness
connector and ground.
OK or NG
OK
>> Brake pedal stroke sensor system is normal.
NG
>> GO TO 3.
CONSULT-II display
CONSULT-II display code
NO DTC
–
BR STROKE SEN CIRC
B2453
PHIA0769E
B PEDAL SIG1
Brake released
→
depressed
: Approx. 1
→
4V
B PEDAL SIG 2
Brake released
→
depressed
: Approx. 4
→
1V
PHIA0766E
Connector
Terminal
(Wire color)
Condition
Voltage [V]
(Approx.)
(+)
(–)
B318
16 (W)
Ground
Brake released
→
depressed
1
→
4
20 (G)
4
→
1
PHIA0753E
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