Infiniti Q45. Manual — part 786
PRE-CRASH SEAT BELT
SB-23
C
D
E
F
G
I
J
K
L
M
A
B
SB
5.
Touch “PRECRASH SEATBELT”.
If “PRECRASH SEATBELT” is not indicated, refer to
"CONSULT-II Data Link Connector (DLC) Circuit"
6.
Select diagnosis mode.
“SELF-DIAG RESULTS”, “DATA MONITOR”, “CAN DIAG SUP-
PORT MNTR“ and “ECU PART NUMBER” are available.
SELF-DIAGNOSIS RESULTS
Display Item List
DATA MONITOR
Display Item List
BCIA0030E
BCIA0031E
CONSULT-II display
Item
Malfunction is detected when...
Reference
page
CAN COMM CIRCUIT [U1000]
CAN communication
Malfunction is detected in CAN communication.
SB MOTOR RH CIRC [B2451]
Seat belt motor RH
Circuit of seat belt motor (RH) is open or shorted.
SB MOTOR LH CIRC [B2452]
Seat belt motor LH
Circuit of seat belt motor (LH) is open or shorted.
BR STROKE SEN CIRC [B2453]
Brake pedal stroke sensor
Circuit of brake pedal stroke sensor is open or shorted.
MOTOR PWR SUP CIRC [B2454]
Motor power supply circuit
Circuit of motor power supply is open or shorted.
PSB C/U INT CIRCUIT [B2455]
ECU circuit
ECU circuit internal abnormality
–
Monitor item [OPERATION or UNIT]
Contents
SB SW RH SIG
“ON/OFF”
RH seat belt switch signal is displayed.
SB SW LH SIG
“ON/OFF”
LH seat belt switch signal is displayed.
VHCL SPEED SE
“Km/h”
Vehicle speed signal is displayed.
B PEDAL SIG1
“V”
Brake pedal stroke sensor 1 signal voltage is displayed.
B PEDAL SIG 2
“V”
Brake pedal stroke sensor 2 signal voltage is displayed.
SB-24
PRE-CRASH SEAT BELT
Preliminary Check
NHS0003U
PRE-CRASH SEAT BELT OPERATION INSPECTION
WARNING:
●
The following tests should be performed in a safe, open place that is free of traffic and obstacles.
●
The tests should be performed on a dry, paved road. Do not attempt the tests on wet or unpaved
road, open road, or highway. (This may cause an accident or personal injury.)
●
Driver and passenger assume it will not operate and prepare themselves accordingly.
1.
Tighten driver and passenger seat belts.
2.
Drive at approximately 25 km/h (16 MPH).
3.
Notify passenger of a sudden stop. Driver and passenger prepare themselves for the possibility of
system not operating. Then, driver fully depresses the brake pedal to stop suddenly.
4.
Make sure that the shoulder of the seat belt is pulled while braking.
Diagnoses Symptom Chart
NHS0003V
Check CAN Communication Circuit [U1000]
NHS0003W
1.
CHECK SELF-DIAGNOSTIC RESULT
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
With CONSULT-II
1.
Connect CONSULT-II, and turn ignition switch ON.
2.
Touch “PRECRASH SEATBELT” on “SELECT SYSTEM”
screen.
3.
Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”
screen.
4.
Check display content in self-diagnostic results.
Displayed U1000?
Yes
>> GO TO
LAN-17, "Precautions When Using CONSULT-
No
>> Inspection END.
Symptom
Diagnosis procedure
Reference
page
All functions of pre-crash seat belt system does not operate.
Check ignition power supply circuit
Check motor power supply and ground circuit
Check CAN communication circuit
Replace pre-crash seat belt control unit.
Driver side pre-crash seat belt system does not operate.
Check seat belt buckle switch (driver side) circuit
Check pre-crash seat belt motor LH
Replace pre-crash seat belt control unit.
Passenger side pre-crash seat belt system does not operate.
Check seat belt buckle switch (passenger side) circuit
Check pre-crash seat belt motor RH
Replace pre-crash seat belt control unit.
Pre-crash seat belt system does not operate during emergency
brake operation.
Check CAN communication circuit
Check brake pedal stroke sensor circuit
Check brake pedal stroke sensor shield wire circuit
Replace pre-crash seat belt control unit.
PHIA0772E
PRE-CRASH SEAT BELT
SB-25
C
D
E
F
G
I
J
K
L
M
A
B
SB
Check Ignition Power Supply Circuit
NHS0003X
1.
CHECK FUSE
Check 10A fuse [No.1, located in fuse block (J/B)].
NOTE:
Refer to
SB-11, "Component Parts and Harness Connector Location"
OK or NG
OK
>> GO TO 2.
NG
>> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to
.
2.
CHECK IGNITION POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check voltage between pre-crash seat belt control unit harness
connector B318 terminal 13 and ground.
OK or NG
OK
>> Ignition power supply circuit is OK.
NG
>> Check pre-crash seat belt control unit ignition power
supply circuit harness.
Check Motor Power Supply and Ground Circuit [B2454]
NHS0003Y
1.
CHECK FUSE
Check 30A fusible link (letter D , located in the fuse and fusible link box).
NOTE:
Refer to
SB-11, "Component Parts and Harness Connector Location"
OK or NG
OK
>> GO TO 2.
NG
>> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to
.
2.
CHECK MOTOR POWER SUPPLY CIRCUIT 1
With CONSULT-II
Select “SELF-DIAG RESULTS” and then make sure the “MOTOR
PWR SUP CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 3.
Displayed B2454?
Yes
>> GO TO 3.
No
>> Motor power supply system is normal.
13 (W/B) – Ground
: Battery voltage
PHIA0743E
CONSULT-II display
CONSULT-II display code
NO DTC
–
MOTOR PWR SUP CIRC
B2454
PHIA0770E
SB-26
PRE-CRASH SEAT BELT
3.
CHECK MOTOR POWER SUPPLY CIRCUIT 2
Check voltage between pre-crash seat belt control unit harness con-
nector B318 terminal 2 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness.
4.
CHECK PRE-CRASH SEAT BELT CONTROL UNIT GROUND CIRCUIT
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 terminals 5, 26 and ground.
OK or NG
OK
>> Motor power supply and ground circuit is OK.
NG
>> Repair or replace harness.
2 (G/R) – Ground
: Battery voltage
PHIA0744E
5 (B) – Ground
: Continuity should exist.
26 (B) – Ground
: Continuity should exist.
PHIA0745E
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