Content .. 778 779 780 781 ..

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

STC-35

C1914

RR ST ANGLE SENSOR [ABNORMAL VOL]

Higher or lower value compared to
the standard voltage.

Inspection 6

STC-35

C1921

MOTOR OUTPUT

No engine speed is input for a cer-
tain time.

Inspection 8

STC-37

C1911

MOTOR VOLTAGE [LOW VOLTAGE]

The motor power supply voltage is
lower than ignition power supply
voltage with RAS motor relay ON.

Inspection 2

STC-30

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

STC-30

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

STC-32

C1902

MOTOR OUTPUT [REV CURRENT]

The current flows in the opposite
direction when the motor current is
output.

Inspection 3

STC-32

C1903

MOTOR OUTPUT [NO CURRENT]

The current flows when the motor
current is not output.

Inspection 3

STC-32

C1904

MOTOR OUTPUT [OVER CURRENT]

The excessive high current flows
when the motor current is output.

Inspection 3

STC-32

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

STC-32

C1919

VEHICLE SPEED SEN [NO SIGNAL]

No vehicle speed signal is input for
some time.

Inspection 4

STC-33

C1900

CONTROL UNIT [ABNORMAL1 - 9]

Control unit malfunction

Inspection 1

STC-30

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

STC-33

C1926

STEERING ANGLE SEN

●

An unexpected signal is input.

●

Steering angle sensor outputs the
malfunction signal.

Inspection 5

STC-33

C1929

VDC

ABS actuator and electric unit (con-
trol unit) outputs the malfunction
signal.

Inspection 7

STC-37

DTC code

Diagnostic item

Diagnostic item is detected when...

Check items

TROUBLE DIAGNOSIS

STC-25

[RAS]

STC

Data Monitor

NGS0009H

OPERATION PROCEDURE

Touch “DATA MONITOR”.

Return to the monitor item selection screen, and touch any of “ALL SIGNALS”, “SELECTION FROM
MENU”.

Touch “START”.

“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

STC-38

U1010

CONTROL UNIT (CAN)

When detecting error during the ini-
tial diagnosis of CAN controller of
RAS control unit.

Inspection 9

STC-38

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

Touch “ACTIVE TEST”.

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

Touch “ECU PART NUMBER”.

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

Start engine.

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.

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

(Neutral)

2.4 V

No output (Approx. 0 A)

R 90

Approx. 4.4 V

Output (change)

L 90

Approx. 0.4 V

SGIA1243E

DTC (warning lamp blinks)

Diagnosis item

Inspection item

RAS control unit

STC-30, "Inspection 1: RAS Control Unit Malfunction"

Motor power supply

STC-30, "Inspection 2: Motor Power Supply System"

Motor output

STC-32, "Inspection 3: RAS Motor Output Malfunction"

Vehicle speed signal

STC-33, "Inspection 4: Vehicle Speed Signal"

Steering angle signal

STC-33, "Inspection 5: Steering Angle Signal Malfunction"

Rear wheel steering angle (main)

STC-35, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"

Rear wheel steering angle (sub)

STC-35, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"

VDC

STC-37, "Inspection 7: VDC Malfunction"

Engine speed signal

STC-37, "Inspection 8: Engine Speed Signal Malfunction"

TROUBLE DIAGNOSIS

STC-27

[RAS]

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

STC-23, "ERASE MEMORY"

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

LAN-47, "CAN Sys-

tem Specification Chart"

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

PS-7, "POWER STEERING FLUID"

●

Is the fluid level proper? Refer to

PS-7, "POWER STEERING FLUID"

●

Is the wheel alignment is adjusted properly? Refer to

PS-37, "SERVICE DATA AND SPECIFICATIONS

(SDS)"

●

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

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"

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

STC-23, "Self-Diagnosis"

Always erase DTC memory after completing self-diagnosis. Refer to

STC-23, "ERASE MEMORY"

BASIC INSPECTION 3: RAS CONTROL UNIT POWER SUPPLY CIRCUIT AND GROUND CIR-
CUIT INSPECTION

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

>> GO TO 2.

>> Poor connection of connector terminal. Repair or replace the terminal.

Content .. 778 779 780 781 ..