Infiniti F50. Manual - part 270

TROUBLE DIAGNOSIS

BRC-23

C

D

E

G

H

I

J

K

L

M

A

B

BRC

TFWM0008E

BRC-24

TROUBLE DIAGNOSIS

TFWM0031E

TROUBLE DIAGNOSIS

BRC-25

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Control Unit Input/Output Signal Standard

EFS001Z8

STANDARDS BY 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

GEAR POSITION

A/T gear position

1:1st gear
2:2nd gear
3:3rd gear
4:4th gear
5:5th gear

—

VHCL SPEED

Wheel speed

Vehicle stopped

0 [km/h (MPH)]

Wheel sensor circuit
[Inspection 1]

BRC-40

  

Vehicle running (Note 1)

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

±

10%)

THRTL OPENING 

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

Accelerator pedal not 
depressed (ignition switch is 
ON)

0%

Communication circuit 
between VDC/TCS/
ABS control unit and 
ECM

Depress accelerator pedal 
(ignition switch is ON)

0 to 100%

ENGINE RPM

With engine running

With engine stopped

0 rpm

Engine speed signal cir-
cuit

Engine running

Almost in accor-
dance with 
tachometer display

STEERING ANGLE 
SIG

Steering angle 
detected by steering 
angle sensor

Straight-ahead

Approx. 0 deg

Steering angle sensor 
and circuit
[Inspection 5] 

BRC-44

Steering wheel turned

–720 to 720 deg

YAW RATE SEN

Yaw rate detected by 
yaw rate sensor

Vehicle stopped

Approx. 0 d/s

Yaw rate sensor and cir-
cuit
[Inspection 6]

BRC-46

  

Vehicle running

–70 to 70 d/s

SIDE G-SEN

Transverse G detected 
by side G-sensor

Vehicle stopped

Approx. 0 m/s

2

Side G-sensor and circuit
[Inspection 6]

BRC-46

  

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

Pressure sensor and cir-
cuit
[Inspection 4] 

BRC-43

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 16V

VDC/TCS/ABS control 
unit power supply and 
ground circuits
[Inspection 11] 

BRC-54

  

STOP LAMP SW

Brake pedal operation

Brake pedal depressed

ON

Stop lamp switch circuit
[Inspection 10] 

BRC-53

Brake pedal not depressed

OFF

PARK BRAKE SW

Parking brake status

Parking brake depressed

ON

Parking brake switch cir-
cuit

Parking brake not depressed

OFF

OFF SW

OFF switch
ON/OFF status

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

ON

VDC OFF switch circuit

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

OFF

BRC-26

TROUBLE DIAGNOSIS

Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of ABS warning lamp
ON: For approximately 1 seconds after ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 1 seconds after ignition switch is turned ON (when system is in normal operation).
(Note 3): ON/OFF timing of VDC OFF indicator lamp
ON: For approximately 1 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC OFF switch is ON.
OFF: Approximately 1 seconds after ignition switch is turned ON (when system is in normal operation.) And when VDC OFF switch is
OFF.

CONSULT-II Functions

EFS001Z9

CONSULT-II FUNCTION APPLICATION TABLE
Caution

●

“FUNCTION TEST” shall not be used for diagnosis. For details, refer to separately supplied “CONSULT-II
Instruction Manual (FUNCTION TEST)”.

●

VDC does not control EBD, ABS, TCS, and VDC during self-diagnosis, data monitor, and active test func-
tion operations.

ABS WARN LAMP

ABS warning lamp ON 
condition (Note 2)

ABS warning lamp ON

ON

ABS warning lamp har-
ness

ABS warning lamp OFF

OFF

VDC OFF LAMP

VDC OFF indicator 
lamp status (Note 3)

When VDC OFF indicator 
lamp is ON

ON

VDC OFF indicator lamp 
circuit

When VDC OFF indicator 
lamp is OFF

OFF

EV SIGNAL
AV SIGNAL

Solenoid valve opera-
tion

Actuator (solenoid) is active 
(“ACTIVE TEST” with CON-
SULT-II) or actuator relay is 
inactive (in fail-safe mode).

ON

Solenoid and circuit
[Inspection 7] 

BRC-47

  

When actuator (solenoid) is 
not active and actuator relay is 
active (ignition switch ON).

OFF

USV SIGNAL
MAV SIGNAL

VDC switch-over valve 
status

When actuator (switch-over 
valve) is active (“ACTIVE 
TEST” with CONSULT-II) or 
actuator relay is inactive (when 
in fail-safe mode).

ON

Switch-over valve and 
circuit
[Inspection 7] 

BRC-47

When actuator (switch-over 
valve) is not active and actua-
tor relay is active (ignition 
switch ON).

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

Actuator motor, motor 
relay, and circuit
[Inspection 8] 

BRC-49

When actuator motor and 
motor relay are inactive.

OFF

Monitor item

Display content

Data monitor

Note: Error inspection 

checklist

Condition

Reference value in 

normal operation

Item

Self-diagnosis

Data monitor

Active test

VHCL SPEED FR

×

×

–

VHCL SPEED FL

×

×

–

VHCL SPEED RR

×

×

–

VHCL SPEED RL

×

×

–

STOP LAMP SW

–

×

–

EV SIGNAL FR

×

×

×

AV SIGNAL FR

×

×

×