Infiniti M35/M45 Y50. Manual - part 1117

TROUBLE DIAGNOSIS

STC-25

[RAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

TGWT0066E

STC-26

[RAS]

TROUBLE DIAGNOSIS

Control Unit Input/Output Signal Standard

NGS000EF

CIRCUIT TESTER REFERENCE VALUE

CAUTION:

When checked using a circuit tester for voltage measurement, connector terminals should not be
forcefully extended.

Terminal

Measuring point

Measuring condition

Standard

+

(wire color)

–

1 (L)

—

CAN-H

—

4 (G)

Ground

RR MAIN SIG

Neutral

Approx. 2.4 V

5 (W)

RR VCC

Ignition switch ON

Approx. 5 V

Ignition switch OFF

Approx. 0 V

7 (R)

RR SUB SIG

Neutral

Approx. 2.4 V

8 (P)

—

CAN-L

—

15 (B/W)

Ground

RR SEN GND

—

Continuity exit

22 (P/L)

STOP/L SW

Brake pedal depressed

Battery voltage (Approx. 12 V)

Brake pedal not depressed

Approx. 0 V

25 (L/W)

RLY

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

26 (G/W)

WARN

ON

Approx. 1.4 V or less

OFF

Ignition voltage: 2.8 V or more

27 (G/B)

IGN

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

34 (B)

GND

—

Continuity exit

36 (LG)

P/S SOL

Normal (Vehicle speed)

0 km/h (0 MPH)

Approx. 4.4 - 6.6 V

100 km/h (62 MPH)

Approx. 2.4 - 3.6 V

In fail-safe mode
(Engine speed)

0 - 1,500 rpm

Approx. 4.4 - 6.6 V

1,500 - 3,000 rpm

Approx. 3.5 V

3,000 rpm or more

Approx. 2.1 V

37 (L/Y)

MOTOR VCC

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

38 (W)

MTR-1 (RH)

—

39 (B)

MTR-2 (LH)

—

40 (B/W)

MOTOR GND

—

Continuity exit

TROUBLE DIAGNOSIS

STC-27

[RAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

STANDARD BY CONSULT-II

CAUTION:

The output signal indicates the RAS control unit calculation data. The normal values will be displayed
even in the event that the output circuit (harness) is open.

CONSULT-II Function (RAS/HICAS)

NGS000EG

FUNCTION

CONSULT-II can display each self-diagnostic item using the diagnostic test modes shown following.

Monitor item

Condition

Reference values

VHCL SPEED SE [km/h] or [mph]

Ignition switch ON or engine running 

Almost in accordance with the speedome-
ter display. It is not a malfunction, through 
it might not be corresponding just after 
ignition switch is turned ON.

STEERING ANG [

°

]

Turning steering wheel clockwise or coun-
terclockwise.

Displays the angle when the steering 
wheel turns from the neutral position

ENGINE SPEED [rpm]

Engine running

Almost in accordance with tachometer dis-
play

POWER STR SOL [A]

Accelerate the vehicle from 0 to 100 km/h 
(0 to 62 MPH)

0 km/h (0 MPH): Approx. 1.10 A
100 km/h (62 MPH): Approx. 0.54 A

RR ST ANG-MAI [V]

Perform the ACTIVE TEST and stroke the 
actuator (with tires off the ground)

Neutral: Approx. 2.4 V
Turn steering wheel to right for full stroke: 
Approx. 4.4 V
Turn steering wheel to left for full stroke: 
Approx. 0.4 V

RR ST ANG-SUB [V]

RR ST ANG-VOL [V]

Ignition switch ON or engine running

Approx. 5 V

C/U VOLTAGE [V]

Battery voltage (Approx. 12 V)

MOTOR VOLTAGE [V]

Battery voltage (Approx. 12V)

MOTOR CURRENT [A]

Perform the ACTIVE TEST and stroke the 
actuator.

It is normal when there is the current out-
put at stroke

MTR CRNT OPE [A]

Turning steering wheel clockwise or coun-
terclockwise while ignition switch is ON or 
running the engine

Neutral (Steering force is zero and straight-
ahead position): Approx. 0 A
The value is changed according to steering 
left or right 

RR ANGLE OPE [

°

]

RAS actuator assembly turned full right

Approx. 1

°

RAS actuator assembly neutral

Approx. 0

°

RAS actuator assembly turned full left

Approx. - 1

°

STOP LAMP SW [ON/OFF]

Depressing or releasing brake pedal

Brake pedal depressed: ON

Brake pedal not depressed: OFF

HICAS RELAY [ON/OFF]

Ignition switch ON or engine running

Ignition switch ON: ON

FAIL SAFE [ON/OFF]

Not activated

WARNING LAMP (ON/OFF)

RAS warning lamp ON: ON
RAS warning lamp OFF: OFF

Diagnostic test mode

Function

Reference page

SELF-DIAG RESULTS

Receives self-diagnosis results from RAS control unit and 
indicates DTCs.

STC-28, "SELF-DIAG 
RESULT MODE"

DATA MONITOR

Receives input/output signals from RAS control unit and 
indicates and stores them to facilitate locating cause of mal-
functions.

STC-30, "DATA MONI-
TOR MODE"

CAN DIAG SUPPORT MNTR

Monitors transmitting/receiving status of CAN communica-
tion.

LAN-44, "CAN Diagnos-
tic Support Monitor"

ACTIVE TEST

Sends command to RAS actuator to change output signals 
and check operation of output system.

STC-30, "ACTIVE TEST 
MODE"

ECU PART NUMBER

Displays RAS control unit part number.

STC-30, "RAS CONTROL 
UNIT PART NUMBER"

STC-28

[RAS]

TROUBLE DIAGNOSIS

CONSULT-II SETTING PROCEDURE

Refer to 

GI-38, "CONSULT-II Start Procedure"

 .

SELF-DIAG RESULT MODE
Operation Procedure

1.

Perform “CONSULT-II Start Procedure”. Refer to 

GI-38, "CONSULT-II Start Procedure"

 .

2.

Touch “PRINT” to print out the self-diagnostic results if necessary. Check RAS warning lamp if “NO FAIL-
URE” is displayed.

3.

Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component. Refer to 

STC-28, "Display Item List"

 .

Display Item List

CAUTION:

When malfunctions are detected in several systems, including the “CAN COMM [U1000]” and “CON-
TROL UNIT (CAN) [U1010]”, inspect the CAN communication system.

DTC

Diagnostic item

Diagnostic item is detected when...

Check items

C1923

STEERING ANGLE SEN [NO CHANGE]

While driving at 60 km/h (37 MPH) 
or more, steering angle does not 
change for a while.

STC-39

C1924

STEERING ANGLE SEN [NO NEUT STATE]

When driving some distance, no 
neutral signal (ON signal) is input.

STC-39

C1915

RR ST ANGLE SENSOR [MAIN SIGNAL]

The main sensor input signal is 
malfunctioning for some time 
against the sensor power supply 
value.

STC-40

C1916

RR ST ANGLE SENSOR [SUB SIGNAL]

When the main sensor input signal 
is 2.4 - 2.6 V, the sub sensor input 
signal is malfunctioning for some 
time compared to the sensor power 
supply value.

STC-40

C1917

RR ST ANGLE SENSOR [OFFSET SIG1]

An excessive difference has 
occurred in the input values of main 
sensor and sub sensor.

STC-40

C1918

RR ST ANGLE SENSOR [OFFSET SIG2]

C1914

RR ST ANGLE SENSOR [ABNORMAL VOL]

Higher or lower value compared to 
the standard voltage.

STC-40

C1921

MOTOR OUTPUT

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

STC-44

C1911

MOTOR VOLTAGE [LOW VOLTAGE]

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

STC-35

C1912

MOTOR VOLTAGE [BAD OBSTRCT]

The motor power supply voltage is 
inputting for some time with motor 
power supply OFF by RAS control 
unit.

STC-35

C1913

MOTOR OUTPUT [ABNORMAL SIG]

When the motor current value is 10 
A or more, actual output is exces-
sively low and the condition contin-
ues for some time.

STC-37

C1902

MOTOR OUTPUT [REV CURRENT]

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

STC-37

C1903

MOTOR OUTPUT [NO CURRENT]

The current flows when the motor 
current is not output. 

STC-37

C1904

MOTOR OUTPUT [OVERCURRENT]

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

STC-37