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Infiniti G35 (V35). Manual - part 779

STC-20

[RAS]

TROUBLE DIAGNOSIS

TGWM0060E

TROUBLE DIAGNOSIS

STC-21

[RAS]

STC

Control Unit Input/Output Signal Standard

NGS0009E

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

RAS MAIN OUTPUT

Neutral

Approx. 2.4 V

5 (W)

RAS SENS POWER

Ignition switch ON

Approx. 5 V

Ignition switch OFF

Approx. 0 V

7 (R)

RR SUB OUTPUT

Neutral

Approx. 2.4 V

8 (P)

—

CAN-L

—

15 (B/W)

Ground

RAS SENS GND

—

Continuity exit

22 (P/L)

BRAKE

Brake pedal depressed

Battery voltage (Approx. 12 V)

Brake pedal not depressed

Approx. 0 V

25 (L/W)

RAS RLY OUTPUT

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

26 (G/W)

W/L

Approx. 1.4 V or less

OFF

Ignition voltage: 2.8 V or more

27 (G/R)

IGN

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

34 (B)

GND

—

Continuity exit

36 (LG)

TOPS 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)

RAS MOTOR POWER

Ignition switch ON

Battery voltage (Approx. 12 V)

Ignition switch OFF

Approx. 0 V

38 (G/R)

MOTOR OUTPUT (RH)

—

39 (G/Y)

MOTOR OUTPUT (LH)

—

40 (B/W)

RAS MOTOR GND

—

Continuity exit

STC-22

[RAS]

TROUBLE DIAGNOSIS

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.

Monitor item

DATA MONITOR

Malfunction inspection

checklist

Condition

Reference values

VHCL SPEED SE (km/h)

Ignition switch ON or engine
running

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

STC-33, "Inspection 4:

Vehicle Speed Signal"

STEERING ANG (

)

Turning steering wheel clock-
wise or counterclockwise.

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

STC-33, "Inspection 5:

Steering Angle Signal

Malfunction"

ENGINE SPEED (rpm)

Engine running

Almost in accordance with tachometer
display

STC-37, "Inspection 8:

Engine Speed Signal

Malfunction"

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

STC-41, "Diagnosis
Chart by Symptom 2"

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

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

RR ST ANG- SUB (V)

RR ST ANG-VOL (V)

Ignition switch ON or engine
running

Approx. 5 V

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

C/U VOLTAGE (V)

Battery voltage (Approx. 12 V)

STC-30, "Inspection 1:
RAS Control Unit Mal-
function"

MOTOR VOLTAGE (V)

Battery voltage (Approx. 12V)

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

MOTOR CURRENT (A)

Perform the ACTIVE TEST
and stroke the actuator.

It is normal when there is the current
output at stroke

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

MTR CRNT OPE (A)

Turning steering wheel clock-
wise or counterclockwise
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

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

RR ANGLE OPE (

)

Rear wheel steering angle
detected by rear wheel steer-
ing angle sensor

Approx. 1

Approx. 0

Approx. - 1

STOP LAMP SW

Depressing or releasing brake
pedal

Brake pedal depressed: ON

STC-39, "Inspection
10: Stop Lamp Switch
Harness"

Brake pedal not depressed: OFF

HICAS RELAY

Ignition switch ON or engine
running

Ignition switch ON: ON

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

FAIL SAFE

Not activated

Self-diagnosis and
suspect system
inspection on DATA
MONITOR

WARNING LAMP (ON/OFF)

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

Warning lamp circuit
inspection

TROUBLE DIAGNOSIS

STC-23

[RAS]

STC

CONSULT-II Function (RAS/HICAS)

NGS0009F

CONSULT-II MAIN FUNCTION

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

CONSULT-II SETTING PROCEDURE

Refer to

GI-37, "CONSULT-II Start Procedure"

Self-Diagnosis

NGS0009G

OPERATION PROCEDURE

Turn ignition switch OFF.

Perform “CONSULT-II Start Procedure”. Refer to

GI-37, "CONSULT-II Start Procedure"

Touch “SELF-DIAG RESULTS”.

The self-diagnostic results are displayed. (Touch “PRINT” to print out the self-diagnostic results if neces-
sary.) Check RAS warning lamp if “NO FAILURE” is displayed.

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

STC-23, "DISPLAY ITEM LIST"

ERASE MEMORY

Turn ignition switch OFF.

Start engine, and touch “SELF-DIAG RESULTS” and “ERASE” in this order to erase the diagnostic mem-
ory.

CAUTION:

If memory cannot be erased, perform applicably diagnosis.

Perform self-diagnosis again, and make sure that DTC memory is erased.

DISPLAY ITEM LIST

CAUTION:

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

Mode

Function

Reference

SELF-DIAG RESULTS

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

STC-23, "Self-Diagnosis"

DATA MONITOR

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

STC-25, "Data Monitor"

CAN DIAG SUPPORT MNTR

Monitors transmitting/receiving status of CAN communi-
cation.

STC-27, "CAN Communication"

ACTIVE TEST

Sends command to RAS actuator to change output sig-
nals and check operation of output system.

STC-26, "Active Test"

ECU PART NUMBER

Displays RAS control unit part number.

STC-26, "Control Unit Part Num-
ber"

DTC code

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.

Inspection 5

STC-33

C1924

STEERING ANGLE SEN [NO NEUT STATE]

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

Inspection 5

STC-33

C1915

RR ST ANGLE SENSOR [MAIN SIGNAL]

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

Inspection 6

STC-35

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.

Inspection 6

STC-35

Content .. 777 778 779 780 ..