Infiniti Q45. Manual - part 264

 

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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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