Infiniti FX35, FX50 (S51). Manual — part 1594
SBC-34
< DTC/CIRCUIT DIAGNOSIS >
U0428 STRG ANGL CAL
U0428 STRG ANGL CAL
Description
INFOID:0000000005241753
Inputs the steering calibration incomplete signal from steering angle sensor via CAN communication.
DTC Logic
INFOID:0000000005241754
DTC DETECTION LOGIC
NOTE:
If DTC U0428 is displayed with DTC U0126, first perform the trouble diagnosis for DTC U0126. Refer to
DTC CONFIRMATION PROCEDURE
1.
SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT CONTROL UNIT
1.
Turn ignition switch ON.
2.
Check “Self-diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005241755
1.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Check “Self-diagnostic result” for “ABS” with CONSULT-III. Refer to
BRC-44, "CONSULT-III Function"
Is DTC detected?
YES
>> Repair or replace malfunctioning parts.
NO
>> GO TO 2.
2.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
>> INSPECTION END
DTC No.
Self-diagnosis item
DTC Detection Condition
Possible causes
U0428
STRG ANGL CAL
Receipt of the calibration incomplete signal
Steering angle sensor calibration incomplete
POWER SUPPLY AND GROUND CIRCUIT
SBC-35
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SBC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000005241756
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 pre-crash seat belt control unit (driver side and passenger side) connectors.
3.
Check voltage between harness pre-crash seat belt control unit (driver side and passenger side) connec-
tor and ground.
Is the measurement value normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness.
3.
CHECK GROUND CIRCUIT
Check continuity between pre-crash seat belt control unit (driver side and passenger side) harness connector
and ground.
Does continuity exist?
YES
>> INSPECTION END
NO
>> Repair or replace harness.
Terminal No.
Signal name
Fuse and fusible link No.
Driver side
1
Battery power supply
11
Passenger side
Pre-crash seat belt control unit (driver side and passenger side)
Ground
Voltage (V)
(Approx.)
Connector
Terminal
B9
1
Battery voltage
B221
Pre-crash seat belt control unit (driver side and passenger side)
Ground
Continuity
Connector
Terminal
B9
18
Existed
20
B221
18
20
SBC-36
< DTC/CIRCUIT DIAGNOSIS >
SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
PRE-CRASH SEAT BELT SYSTEM
PRE-CRASH SEAT BELT SYSTEM : Description
INFOID:0000000005241757
• Performs the control of tension reducer according to the seat belt buckle switch ON/OFF.
• Detects whether or not the seat belt is fastened when the ignition switch turns ON. If the seat belt is not fas-
tened, illuminates the seat belt warning lamp on the combination meter.
• The seat belt buckle switch is installed in the seat belt buckle.
PRE-CRASH SEAT BELT SYSTEM : Component Function Check
INFOID:0000000005241758
1.
CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
With CONSULT-III
When checking “BUCKLE SW LH” on DATA MONITOR screen, check that ON/OFF display changes synchro-
nized with the insertion operation to the seat belt buckle.
Is the inspection result normal?
YES
>> Seat belt buckle switch (driver side) circuit is normal.
NO
>> Refer to
SBC-36, "PRE-CRASH SEAT BELT SYSTEM : Diagnosis Procedure"
.
PRE-CRASH SEAT BELT SYSTEM : Diagnosis Procedure
INFOID:0000000005241759
1.
CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
Check that voltage between seat belt buckle switch (driver side) and ground.
Is the inspection result normal?
YES
>> Seat belt buckle switch (driver side) circuit is normal.
NO
>> GO TO 2.
2.
CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect pre-crash seat belt control unit (driver side) connector and seat belt buckle switch (driver side)
connector.
3.
Check continuity between pre-crash seat belt control unit (driver side) and seat belt buckle switch (driver
side).
4.
Check continuity between pre-crash seat belt control unit (driver side) and ground.
Monitor item
Condition
BUCKLE SW LH
When driver side seat belt is not fastened: OFF
When driver side seat belt is fastened: ON
(+)
(–)
Condition
Voltage (V)
(Approx.)
Seat belt buckle switch (driver side)
Connector
Terminal
B503
59
Ground
When driver side seat
belt is not fastened
5
When driver side seat
belt is fastened
0
Pre-crash seat belt control unit (driver side)
Seat belt buckle switch (driver side)
Continuity
Connector
Terminal
Connector
Terminal
B9
6
B503
59
Existed
SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
SBC-37
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SBC
N
O
P
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness between pre-crash seat belt control unit (driver side) and seat belt
buckle switch (driver side).
3.
CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat belt buckle switch (driver side) and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness between seat belt buckle switch and ground.
4.
CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
Check seat belt buckle switch (driver side). Refer to
SBC-37, "PRE-CRASH SEAT BELT SYSTEM : Compo-
nent Inspection (Belt Buckle Switch)"
.
Is the inspection result normal?
YES
>> Replace pre-crash seat belt control unit (driver side).
NO
>> Replace seat belt buckle switch (driver side).
PRE-CRASH SEAT BELT SYSTEM : Component Inspection (Belt Buckle Switch)
INFOID:0000000005241760
1.
CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
1.
Turn ignition switch OFF.
2.
Disconnect seat belt buckle switch connector.
3.
Check continuity of seat belt buckle (driver side).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace seat belt buckle switch (driver side).
SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : Description
INFOID:0000000005241761
• Performs the control of tension reducer according to the seat belt buckle switch ON/OFF.
• Detects whether or not the seat belt is fastened when the ignition switch turns ON. If the seat belt is not fas-
tened, illuminates the seat belt warning lamp on the combination meter.
• The seat belt buckle switch is installed in the seat belt buckle.
SEAT BELT WARNING LAMP SYSTEM : Component Function Check
INFOID:0000000005241762
1.
CHECK SEAT BELT BUCKLE SWITCH
Pre-crash seat belt control unit (driver side)
Ground
Continuity
Connector
Terminal
B9
6
Not existed
Seat belt buckle switch (driver side)
Ground
Continuity
Connector
Terminal
B503
60
Existed
Seat belt buckle switch (driver side)
Condition
Continuity
Terminal
59
60
When driver side seat belt is
not fastened
Not existed
When driver side seat belt is
fastened
Existed
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