Infiniti G35 (V35) Sedan. Manual — part 1306
STC-114
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C1920 STEERING ANGLE SEN
2.
Turn the ignition switch OFF.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 1.
5.
PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT-III
1.
Start engine.
CAUTION:
Check that condition with the vehicle stopped.
2.
Select “SLOW MODE” item on “ACTIVE TEST” of 4WAS front control unit.
3.
Perform “MODE START” of “ACTIVE TEST”.
4.
Turn steering wheel to the left slowly until it stops.
5.
Turn steering wheel to the right slowly until it stops.
Does “OK” display on both the left and right sides on “SLOW MODE” items of the monitor?
YES
>> GO TO 6.
NO
>> Refer to
STC-30, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special
Repair Requirement (Pattern 4)"
6.
PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
Is malfunction detected?
YES
>> Check malfunctioning circuit.
NO
>> GO TO 7.
7.
ERASE ERROR RECORD
With CONSULT-III
Erase memories of self-diagnosis results for 4WAS front control unit and 4WAS main control unit.
>> END
4WAS STR
ANG :
−
3.5 – 3.5deg
C1921 ENGINE SPEED SIGNAL
STC-115
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
C1921 ENGINE SPEED SIGNAL
Description
INFOID:0000000000958872
• The engine speed signal is transmitted to 4WAS main control unit via CAN communication.
DTC Logic
INFOID:0000000000958873
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
RECHECK DTC
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform 4WAS main control unit self-diagnosis.
Is DTC “C1921” detected?
YES
>> Proceed to diagnosis procedure. Refer to
STC-115, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000958874
1.
PERFORM ECM SELF-DIAGNOSIS
With CONSULT-III
Perform ECM self-diagnosis.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is DTC “U1000” or “U1010” detected?
YES
>> Check the error system.
NO
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is DTC “C1921” detected?
YES
>> Replace 4WAS main control unit. Refer to
NO
>> GO TO 4.
4.
INFORMATION CHECK
With CONSULT-III
Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to
.
Is each data the standard value?
YES
>> Check that there is no malfunction in each harness connector pin terminal or disconnection.
NO
>> Replace 4WAS main control unit. Refer to
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1921
ENG REV SIGNAL
Malfunction is detected in engine speed signal that is
output from ECM with CAN communication.
(Improper signal is input engine speed.)
Engine speed signal error
STC-116
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C1921 ENGINE SPEED SIGNAL
Special Repair Requirement
INFOID:0000000000958875
BEFORE REPLACING 4WAS MAIN CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Replace it without erasing the memory (history) of self-diagnosis results when replacing 4WAS
main control unit after diagnosis.
• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-
ues of “DATA MONITOR” when erasing the memory of the self-diagnosis results (record).
C1923 STEERING ANGLE SEN
STC-117
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
C1923 STEERING ANGLE SEN
Description
INFOID:0000000000958876
• Steering angle sensor signal is transmitted to 4WAS main control unit from 4WAS main control unit via CAN
communication.
DTC Logic
INFOID:0000000000958877
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
RECHECK DTC
With CONSULT-III
1.
Drive at 60 km/h (38MPH) or more for 3 minutes or more.
2.
Perform 4WAS main control unit self-diagnosis.
Is DTC “C1923” detected?
YES
>> Proceed to diagnosis procedure. Refer to
STC-117, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000958878
1.
PERFORM ABS AUTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is DTC “U1000” or “U1010” detected?
YES
>> Check the error system.
NO
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is DTC “C1923” detected?
YES
>> Replace 4WAS main control unit. Refer to
NO
>> GO TO 4.
4.
INFORMATION CHECK
With CONSULT-III
Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to
.
Is each data the standard value?
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1923
STEERING ANGLE SEN
[NO CHANGE]
Malfunction is detected in steering angle sensor signal
that is output from steering angle sensor with CAN
communication.
[Steering angle sensor input signal error is detected
when driving at 60 km/h (37MPH) or more.]
Steering angle sensor in-
put signal error
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