Infiniti Q45. Manual — part 264

TROUBLE DIAGNOSIS

BRC-21

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

TFWM0216E

BRC-22

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Control Unit Input/Output Signal Standard

NFS000CU

VDC/TCS/ABS CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II

CAUTION:

Items displayed are data calculated by control unit and may indicate normal operation even if output
circuit (harness) is open or shorted.

Monitor item

Display content

Data monitor

Note: Error inspection

checklist

Condition

Reference value in

normal operation

N-POSI SIG

Conditions of N, R and
P position signals

N position

ON

BRC-51, "Park/Neutral

Position Switch"

Any position other than N

OFF

R-POSI SIG

When R position

ON

Not R position

OFF

P-POSI SIG

When P position

ON

Not P position

OFF

GEAR POSITION

A/T gear position

1st gear

1

—

2nd gear

2

3rd gear

3

4th gear

4

5th gear

5

VHCL SPEED FR
VHCL SPEED FL
VHCL SPEED RR
VHCL SPEED RL

Wheel speed

Vehicle stopped

0 [km/h]

BRC-36, "Wheel Sensor"

Vehicle running (Note 1)

Almost in accor-
dance with speed-
ometer display
(within

±

10 %)

THRTL OPENING

Throttle actuator open-
ing/closing is displayed
(linked with accelerator
pedal).

Accelerator pedal not
depressed (ignition switch is
ON)

0%

BRC-38, "Engine System
Control Signal"

Depress accelerator pedal
(ignition switch is ON)

0 to 100%

ENGINE RPM

With engine running

With engine stopped

0 rpm

Engine running

Almost in accor-
dance with tachom-
eter display

STEERING ANGLE
SIG

Steering angle detected
by steering angle sen-
sor

Straight-ahead

Approx. 0

°

BRC-40, "Steering Angle
Sensor"

Steering wheel turned

–720 to 720

°

YAW RATE SEN

Yaw rate detected by
yaw rate sensor

Vehicle stopped

Approx. 0 d/s

BRC-42, "Yaw Rate/Side
G Sensor"

Vehicle running

–70 to 70 d/s

SIDE G-SEN

Transverse G detected
by side G sensor

Vehicle stopped

Approx. 0 m/s

2

Vehicle running

–24.3 to 24.1 m/s

2

PRESS SENSOR

Brake fluid pressure
detected by pressure
sensor

With ignition switch turned ON
and brake pedal released

Approx. 0 bar

BRC-39, "Pressure Sen-
sor"

With ignition switch turned ON
and brake pedal depressed

–40 to 300 bar

ABS CONT VOLT

Battery voltage sup-
plied to VDC/TCS/
ABS control unit

Ignition switch ON

10 to 16 V

BRC-50, "VDC/TCS/ABS
Control Unit Power Sup-
ply And Ground Circuit"

STOP LAMP SW

Brake pedal operation

Brake pedal depressed

ON

BRC-49, "Stop Lamp
Switch"

Brake pedal not depressed

OFF

TROUBLE DIAGNOSIS

BRC-23

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of warning lamp and indicator lamp. Refer to

BRC-35, "ABS WARNING LAMP, VDC OFF INDICATOR LAMP,

AND SLIP INDICATOR LAMP"

.

CONSULT-II Functions (VDC)

NFS000CV

CONSULT-II MAIN FUNCTION

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

PARK BRAKE SW

Parking brake status

Parking brake depressed

ON

BRC-56, "PARKING
BRAKE SWITCH"

Parking brake not depressed

OFF

OFF SW

OFF switch
ON/OFF status

VDC OFF switch on
(When VDC OFF indicator
lamp is on)

ON

BRC-55, "VDC OFF
SWITCH"

VDC OFF switch off
(When VDC OFF indicator
lamp is OFF)

OFF

ABS WARN LAMP

ABS warning lamp ON
condition (Note 2)

ABS warning lamp on

ON

BRC-35, "ABS WARNING
LAMP, VDC OFF INDICA-
TOR LAMP, AND SLIP
INDICATOR LAMP"

ABS warning lamp off

OFF

VDC OFF LAMP

VDC OFF indicator
lamp status (Note 2)

When VDC OFF indicator lamp
is on

ON

When VDC OFF indicator lamp
is off

OFF

SLIP LAMP

SLIP indicator lamp sta-
tus
(Note 2)

When SLIP indicator lamp is
ON.

ON

BRC-35, "ABS WARNING
LAMP, VDC OFF INDICA-
TOR LAMP, AND SLIP
INDICATOR LAMP"

When SLIP indicator lamp is
OFF.

OFF

EV SIGNAL-FL
EV SIGNAL-RR
EV SIGNAL-FR
EV SIGNAL-RL
AV SIGNAL-FL
AV SIGNAL-RR
AV SIGNAL-FR
AV SIGNAL-RL

Solenoid valve opera-
tion

Actuator (solenoid) is active
(“ACTIVE TEST” with CON-
SULT-II).

ON

BRC-44, "Solenoid and
VDC Switching Valve"

When actuator (solenoid) is not
active.

OFF

USV SIGNAL-P
USV SIGNAL-S
MAV SIGNAL-P
MAV SIGNAL-S

VDC switch-over valve
status

When actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II).

ON

When actuator (switch-over
valve) is not active.

OFF

M/R OUTPUT

Actuator motor and
motor relay status (ON/
OFF)

When actuator motor and
motor relay are active
(“ACTIVE TEST” with CON-
SULT-II).

ON

BRC-46, "Actuator Motor
and Motor Relay"

When actuator motor and
motor relay are inactive.

OFF

FLUID LEV SW

Brake fluid level switch
status

When brake fluid level switch
ON.

ON

BRC-53, "Brake Fluid
Level Switch"

When brake fluid level switch
OFF.

OFF

Monitor item

Display content

Data monitor

Note: Error inspection

checklist

Condition

Reference value in

normal operation

BRC-24

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

CONSULT-II SETTING PROCEDURE

Refer to

GI-36, "CONSULT-II Start Procedure"

.

SELF-DIAG RESULT MODE
Operation Procedure

1.

Perform “CONSULT-II Start Procedure”. Refer to

GI-36, "CONSULT-II Start Procedure"

.

2.

Start engine and drive at approximately 30 km/h (19 MPH) for approximately 1 minute.

3.

Stop vehicle. With engine at idle, touch “SELF-DIAG RESULTS”. Display shows malfunction experienced
since the last erasing operation.

4.

Self-diagnosis results are displayed. (If necessary, touch “PRINT” to print self-diagnosis result.)

●

When “NO FAILURE” is shown, check ABS warning lamp, VDC OFF indicator lamp and SLIP indicator
lamp. Refer to

BRC-60, "ABS Warning Lamp Indication Is Not Normal"

,

BRC-61, "Slip Indicator Lamp

Indication Is Not Normal"

,

BRC-61, "VDC OFF Indicator Lamp Indication Is Not Normal"

.

●

CONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some cases
later ones (timing value is small) appear on next screen.

5.

Go to appropriate inspection from to display item list, and repair or replace as necessary.

6.

Start engine and drive at approximately 30 km/h (19 MPH) for approximately 1 minute.

CAUTION:

●

Check again to make sure that there is no malfunction on other parts.

●

When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if everything is normal.

Diagnostic test mode

Function

Reference

WORK SUPPORT

This mode enables a technician to adjust some devices faster and
more accurately by following the indications on CONSULT-II.

BRC-6, "Adjustment of Steer-
ing Angle Sensor Neutral
Position"

SELF-DIAG RESULTS

Self-diagnostic results can be read and erased quickly.

BRC-24, "SELF-DIAG
RESULT MODE"

DATA MONITOR

Input/Output data in the VDC/TCS/ABS control unit can be read.

BRC-27, "DATA MONITOR
MODE"

CAN DIAG SUPPORT MNTR

The results of transmit/receive diagnosis of communication can be
read.

LAN-29, "CAN Diagnostic
Support Monitor"

ACTIVE TEST

Diagnostic Test Mode in which CONSULT-II drives some actuators
apart from the VDC/TCS/ABS control unit and also shifts some
parameters in a specified range.

BRC-30, "ACTIVE TEST"

FUNCTION TEST

Performed by CONSULT-II instead of a technician to determine
whether each system is “OK” or “NG”.

Separate volume

″

CONSULT-

II OPERATION MANUAL
(FUNCTION TEST)

″

ECU PART NUMBER

VDC/TCS/ABS control unit part number can be read.

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