Infiniti G35 (V35). Manual — part 780
STC-24
[RAS]
TROUBLE DIAGNOSIS
C1917, C1918
RR ST ANGLE SENSOR [OFFSET SIG1, 2]
An excessive difference has
occurred in the input values of main
sensor and sub sensor.
Inspection 6
C1914
RR ST ANGLE SENSOR [ABNORMAL VOL]
Higher or lower value compared to
the standard voltage.
Inspection 6
C1921
MOTOR OUTPUT
No engine speed is input for a cer-
tain time.
Inspection 8
C1911
MOTOR VOLTAGE [LOW VOLTAGE]
The motor power supply voltage is
lower than ignition power supply
voltage with RAS motor relay ON.
Inspection 2
C1912
MOTOR VOLTAGE [BAD OBSTRCT]
The motor power supply voltage is
inputting for some time with motor
power supply OFF by RAS control
unit.
Inspection 2
C1913
MOTOR OUTPUT [ABNORMAL SIG]
When the motor current value is
10A or more, actual output is
excessively low and the condition
continues for some time.
Inspection 3
C1902
MOTOR OUTPUT [REV CURRENT]
The current flows in the opposite
direction when the motor current is
output.
Inspection 3
C1903
MOTOR OUTPUT [NO CURRENT]
The current flows when the motor
current is not output.
Inspection 3
C1904
MOTOR OUTPUT [OVER CURRENT]
The excessive high current flows
when the motor current is output.
Inspection 3
C1910
MOTOR OUTPUT [MOTOR LOCK]
When 17 A or more current flows to
the motor, the rear wheel steering
angle sensor signal does not
change for some time.
Inspection 3
C1919
VEHICLE SPEED SEN [NO SIGNAL]
No vehicle speed signal is input for
some time.
Inspection 4
C1900
CONTROL UNIT [ABNORMAL1 - 9]
Control unit malfunction
Inspection 1
C1901
C1905
C1906
C1907
C1908
C1909
C1922
C1928
C1920
STEERING ANGLE SEN [NO SIGNAL]
No steering angle signal is input for
some time.
Inspection 5
C1926
STEERING ANGLE SEN
●
An unexpected signal is input.
●
Steering angle sensor outputs the
malfunction signal.
Inspection 5
C1929
VDC
ABS actuator and electric unit (con-
trol unit) outputs the malfunction
signal.
Inspection 7
DTC code
Diagnostic item
Diagnostic item is detected when...
Check items
TROUBLE DIAGNOSIS
STC-25
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
Data Monitor
NGS0009H
OPERATION PROCEDURE
1.
Touch “DATA MONITOR”.
2.
Return to the monitor item selection screen, and touch any of “ALL SIGNALS”, “SELECTION FROM
MENU”.
3.
Touch “START”.
4.
“DATA MONITOR” screen is displayed.
DISPLAY ITEM LIST
U1000
CAN COMM CIRCUIT
When RAS control unit is not trans-
mitting or receiving CAN communi-
cation signal for 2 seconds or more.
Inspection 9
U1010
CONTROL UNIT (CAN)
When detecting error during the ini-
tial diagnosis of CAN controller of
RAS control unit.
Inspection 9
DTC code
Diagnostic item
Diagnostic item is detected when...
Check items
Item (Display or Unit)
Remarks
VHCL SPEED SE (km/h)
Vehicle speed received via CAN communication is displayed.
STEERING ANG (
°
)
Steering angle received via CAN communication is displayed.
ENGINE SPEED (rpm)
Engine speed received via CAN communication is displayed.
POWER STR SOL (A)
Power steering solenoid controlling current that RAS control unit outputs is dis-
played.
RR ST ANG MAI (V)
Rear wheel steering angle main sensor output voltage is displayed.
RR ST ANG SUB (V)
Rear wheel angle sub sensor output voltage is displayed.
RR ST ANG VOL (V)
Voltage supplied from RAS control unit to rear wheel steering angle sensor is
displayed.
C/U VOLTAGE (V)
Voltage supplied to RAS control unit is displayed.
MOTOR VOLTAGE (V)
Voltage supplied from RAS control unit to RAS motor is displayed.
MOTOR CURRENT (A)
RAS motor relay controlling current that RAS control unit outputs is displayed.
MOTOR CRNT OPE (A)
Current commanded value to RAS motor is displayed.
RR ANG OPE (
°
)
Angle commanded value to rear wheel steering angle sensor is displayed.
STOP LAMP SW (ON/OFF)
Condition of stop lamp switch ON/OFF is displayed.
HICAS RELAY (ON/OFF)
RAS motor relay ON/OFF condition is displayed.
FAILSAFE (ON/OFF)
Fail-safe ON/OFF condition is displayed.
WARNING LAMP (ON/OFF)
RAS warning lamp operating condition is displayed.
STC-26
[RAS]
TROUBLE DIAGNOSIS
Active Test
NGS0009I
OPERATION PROCEDURE
1.
Touch “ACTIVE TEST”.
2.
When turning the steering wheel right or left, the rear wheel turns in the same direction. If the steering
wheel is not turned, the rear wheel turns left and right 5 times.
Control Unit Part Number
NGS0009J
OPERATION PROCEDURE
1.
Touch “ECU PART NUMBER”.
2.
The part number described on RAS control unit sticker is displayed.
Diagnosis Procedure With Self-Diagnosis Function (Without CONSULT-II)
NGS0009K
DESCRIPTION
If a malfunction is detected in the system, the RAS warning lamp turns on and indicates the malfunction. At
that time, fail-safe activates, and then stops the function.
SELF-DIAGNOSIS PROCEDURE
1.
Start engine.
2.
Turn steering wheel left and right at 20
°
or more and 5 times or more within 10 seconds. And then depress
the service brake 5 times or more.
3.
RAS warning lamp blinks (displays normal/malfunction).
SELF-DIAGNOSIS DISPLAY
RAS warning lamp blinks and displays the self-diagnostic results.
●
Only DTCs are displayed as the pattern shown in the figure, and
then repeat the display.
●
If all items are normal, RAS warning lamp blinks at 4 Hz cycle.
SELF-DIAGNOSIS DISPLAY ITEMS
STEERING ANG
RR ST ANG MAI
RR ST ANG SUB
MOTOR CURRENT
0
°
(Neutral)
2.4 V
2.4 V
No output (Approx. 0 A)
R 90
°
Approx. 4.4 V
Approx. 4.4 V
Output (change)
L 90
°
Approx. 0.4 V
Approx. 0.4 V
SGIA1243E
DTC (warning lamp blinks)
Diagnosis item
Inspection item
11
RAS control unit
STC-30, "Inspection 1: RAS Control Unit Malfunction"
12
Motor power supply
STC-30, "Inspection 2: Motor Power Supply System"
13
Motor output
STC-32, "Inspection 3: RAS Motor Output Malfunction"
21
Vehicle speed signal
STC-33, "Inspection 4: Vehicle Speed Signal"
22
Steering angle signal
STC-33, "Inspection 5: Steering Angle Signal Malfunction"
24
Rear wheel steering angle (main)
STC-35, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"
25
Rear wheel steering angle (sub)
STC-35, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"
26
VDC
STC-37, "Inspection 7: VDC Malfunction"
33
Engine speed signal
TROUBLE DIAGNOSIS
STC-27
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
HOW TO ERASE SELF-DIAGNOSIS
If there is the history data for when the fail-safe has activated in the past, erase the memory with CONSULT-II.
Refer to
CAN Communication
NGS0009L
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. Refer to
For Fast and Accurate Trouble Diagnosis
NGS0009M
Check the following items with the vehicle stopped
●
Is air pressure and size of tires proper?
●
Is the specified part used for the steering wheel?
●
Is control unit a genuine part?
●
Are there any fluid leakage from steering gear assembly, power steering oil pump, and hydraulic pipes,
etc? Refer to
●
Is the fluid level proper? Refer to
●
Is the wheel alignment is adjusted properly? Refer to
PS-37, "SERVICE DATA AND SPECIFICATIONS
●
Are there any damage or modification to suspension or body resulting in increased weight or altered
ground clearance?
●
Check each link installation condition of suspension and axle.
●
Is the battery voltage proper?
●
Check each connector connection condition.
Check the following items while driving the vehicle
●
Conditions when the error occurred (5W 1H).
●
Is the engine is normal?
Basic Inspection
NGS0009N
BASIC INSPECTION 1: POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY
Check battery terminals for looseness on both positive and negative ones and ground connection. Also make
sure that battery voltage does not drop.
BASIC INSPECTION 2: RAS WARNING LAMP INSPECTION
1.
Make sure RAS warning lamp turns on when ignition switch is turned ON.
●
If it does not turn on, refer to
STC-28, "Trouble Diagnosis Chart"
.
2.
Make sure that RAS warning lamp turns off when the engine is started after ignition switch is turned ON. If
it does not turn off, perform self-diagnosis. Refer to
3.
Always erase DTC memory after completing self-diagnosis. Refer to
BASIC INSPECTION 3: RAS CONTROL UNIT POWER SUPPLY CIRCUIT AND GROUND CIR-
CUIT INSPECTION
1.
CHECK RAS CONTROL UNIT CONNECTOR
Turn ignition switch OFF, disconnect RAS control unit harness connector, and check terminal for deformation,
disconnection, looseness, etc.
OK or NG
OK
>> GO TO 2.
NG
>> Poor connection of connector terminal. Repair or replace the terminal.
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