Infiniti FX35, FX50 (S51). Manual — part 1588
SBC-10
< SYSTEM DESCRIPTION >
SEAT BELT WARNING SYSTEM
SEAT BELT WARNING SYSTEM
System Diagram
INFOID:0000000005241703
System Description
INFOID:0000000005241704
• Turns ON seat belt warning lamp, when the Occupant Detection System judges adult or child in the front
passenger seat and the passenger seat belt buckle switch is OFF.
• Operation of air bag diagnosis sensor unit when air bag diagnosis sensor unit receives information from
Occupant Detection System.
• In addition, seat belt warning lamp illuminates, when the driver side seat belt is not fasten. This does not
relate to the air bag diagnosis sensor unit.
• For driver seat belt function, refer to
MWI-6, "METER SYSTEM : System Diagram"
JMHIA0685GB
Status (front passenger seat)
Seat belt warning lamp (When front passenger seat is unbuck-
led)
Empty
OFF
An object
OFF
Child/ child-seat
ON
Adult
ON
Malfunction
OFF
Zero point reset
Not yet performed (service parts only)
OFF
SEAT BELT WARNING SYSTEM
SBC-11
< SYSTEM DESCRIPTION >
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Component Parts Location
INFOID:0000000005241705
Component Description
INFOID:0000000005241706
1.
Combination meter (seat belt warn-
ing lamp)
2.
Seat belt buckle switch (driver side) 3.
Seat belt buckle switch (passenger
side)
4.
Air bag diagnosis sensor unit
5.
Occupant Detection Sensor unit
6.
Occupant Detection Sensor sensor
7.
Passenger air bag OFF indicator
A.
View with center console assembly
removed
B.
Backside of the seat cushion
JMHIA0686ZZ
Component parts
Outline of function
Seat belt buckle switch (Driver side)
Detects if the seat belt buckle switch (driver side) is fastened or unfastened
Seat belt buckle switch (Passenger side)
Detects if the seat belt buckle switch (passenger side) is fastened or unfastened
Seat belt warning lamp
Turns the seat belt warning lamp ON when the seat belt is unfastened
Occupant Detection System control unit
Judges the passenger seat condition based on the information from Occupant Detec-
tion System control unit
Occupant Detection System sensor
Detects if the passenger seat is empty or occupied
Air bag diagnosis sensor unit
Turns ON seat belt warning lamp based on the information from Occupant Detection
System control unit
Front passenger air bag OFF indicator
Turns the front passenger air bag OFF indicator lamp ON when the front passenger
seat is occupied by a child or a chile seat
SBC-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
CONSULT-III Function
INFOID:0000000005241707
Diagnosis for pre-crash seat belt system can be performed using CONSULT-III.
APPLICATION ITEM
SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
CAUTION:
When malfunctions are detected in several systems, including the CAN communication [U1000], trou-
bleshoot the CAN communication [U1000].
ERASING SELF-DIAGNOSIS RESULTS
• SELF-DIAGNOSIS RESULTS
Part to be diagnosed
Diagnosis Mode
Function description
Pre-crash seat belt
Self-diagnosis Results
• Displays data recorded when a malfunction is de-
tected.
• Can print out the display.
• Erases DTC recorded in memory.
Data Monitor
Displays input data for pre-crash seat belt control
unit in real time.
Work Support
Changes the setting for each system function.
CAN DIAG SUPPORT MNTR
Monitors communication status of CAN communi-
cation.
Ecu Identification
Displays pre-crash seat belt control unit part num-
ber.
DTC
Trouble diagnosis name
(CONSULT-III display)
DTC detection condition
Reference
U1000
CAN COMM CIRCUIT
Pre-crash seat belt control unit cannot transmit and receive CAN
communication signal for 2 seconds or more
B2451
SEAT BLT MTR DR CIRC
• Motor or control unit malfunction
• Seat belt motor circuit is shorted or open
B2452
SEAT BLT MTR DR CIRC
• Motor or control unit malfunction
• Seat belt motor circuit is shorted or open
B2453
BR_STROKE_SEN_CIRC
• Brake pedal stroke sensor malfunction
• Brake pedal stroke sensor circuit is short
B2454
SEAT BLT PWR DR CIRC
Motor power supply circuit is shorted or open
B2455
CONTROL UNIT DR
Malfunction in pre-crash seat belt control unit
B2456
SEAT BLT PWR AS
Motor power supply circuit is shorted or open
B2457
CONTROL UNIT AS
Malfunction in pre-crash seat belt control unit
B2458
LOCAL COMM
Local communication line shorted or open
B2461
VHCL SPEED SIGNAL
Vehicle speed signal malfunction is received
B2462
VHCL DISTANCE SIGNAL
ACC signal malfunction is received
B2466
DR/AS CONTROL UNIT
Control unit is out of the vehicle specification
B2470
SYS HEAT PROTC DR
Deactivation for cooling to prevent system heating due to continuous
operation
B2471
SYS HEAT PROTC AS
Deactivation for cooling to prevent system heating due to continuous
operation
U0126
STRG ANG SEN SIG
Steering angle sensor malfunction is received
U0428
STRG ANGL CAL
Steering angle sensor calibration incomplete signal is received
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
SBC-13
< SYSTEM DESCRIPTION >
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Current “SELF-DIAG RESULTS” are displayed. (If all suspect circuits have been repaired, “NO DTC” is dis-
played.)
• SELF-DIAG RESULTS [MEMORY]
Resume trouble diagnosis item selection screen, confirm “SELF-DIAG RESULTS”, and then touch ERASE
MEMORY.
DATA MONITOR
WORK SUPPORT
Monitor item
Contents
BUCKLE SW RH
Indicates [ON/OFF] condition of seat belt buckle switch (RH).
BUCKLE SW LH
Indicates [ON/OFF] condition of seat belt buckle switch (LH).
VEHICLE DISTANCE
Indicates [ON/OFF] condition of intelligent brake assist signal.
IGN SW
Indicates [ON/OFF] condition of ignition switch.
FR DOOR SW RH
Indicates [Close/Open] condition of front door switch (RH).
FR DOOR SW LH
Indicates [Close/Open] condition of front door switch (LH).
VHCL SPEED
Indicates [Km/h] vehicle speed signal.
BRK PEDAL SNSR1
Indicates [V] voltage of brake pedal stroke sensor 1 signal.
BRK PEDAL SNSR2
Indicates [V] voltage of brake pedal stroke sensor 2 signal.
STRG ANGLE
Indicates [deg] steering angle signal.
STRG ACCL SPEED
Indicates [deg/s] steering acceleration speed signal.
HEAT PROTC RH
Indicates [ON/OFF] condition of heat protection (RH).
HEAT PROTC LH
Indicates [ON/OFF] condition of heat protection (RH).
Monitor item
Description
DOOR OPENING RETRACT RETRY
Changes the number of times for the seat belt retract retry when the door opens.
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