Infiniti G37 Coupe. Manual - part 263

BRC-26

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]

CONSULT-III Function

INFOID:0000000001635039

FUNCTION

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

SELF-DIAG RESULTS MODE

Operation Procedure

Before performing the self-diagnosis, start engine and drive vehicle at 30 km/h (19 MPH) or more for approxi-
mately 1 minute.

How to Erase Self-diagnosis Results

After erasing DTC memory, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1
minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp, SLIP indi-
cator lamp and brake warning lamp turn OFF.

CAUTION:

If memory cannot be erased, perform applicable diagnosis.
NOTE:
• When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp,

VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn OFF even when the sys-
tem is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approximately 1
minute.

• Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or of brake fluid

level switch operation (when brake fluid is insufficient).

• VDC OFF switch should not stay “ON” position.

Display Item List

Refer to 

BRC-88, "DTC No. Index"

.

DATA MONITOR MODE

Display Item List

×

: Applicable 

: Optional item

Diagnostic test mode

Function

Work support

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

Self-diagnostic results

Self-diagnostic results can be read and erased quickly.

Data monitor

Input/Output data in the ABS actuator and electric unit (control unit) can be read.

Active test

Diagnostic test mode is which CONSULT-III drives some actuators apart from the ABS actuator 
and electric unit (control unit) and also shifts some parameters in a specified range.

ECU part number

ABS actuator and electric unit (control unit) part number can be read.

Monitor item (Unit)

SELECT MONITOR ITEM

Remarks

ECU INPUT 

SIGNALS

MAIN SIGNLAS

FR LH SENSOR
[km/h (MPH)]

×

×

Wheel speed

FR RH SENSOR
[km/h (MPH)]

×

×

RR LH SENSOR
[km/h (MPH)]

×

×

RR RH SENSOR
[km/h (MPH)]

×

×

STOP LAMP SW
(On/Off)

×

×

Stop lamp switch signal status

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

BRC-27

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

BATTERY VOLT
(V)

×

×

Battery voltage supplied to the ABS actuator and electric unit (control 
unit)

SLCT LVR POSI

×

×

A/T selector lever position

OFF SW
(On/Off)

×

×

VDC OFF switch

YAW RATE SEN
(d/s)

×

×

Yaw rate detected by yaw rate/side G sensor

ACCEL POS SIG
(%)

×

Throttle actuator opening/closing is displayed (Linked with accelera-
tor pedal)

SIDE G-SENSOR

(m/s

2

)

×

Transverse G detected by yaw rate/side G sensor

STR ANGLE SIG
(

°

)

×

Steering angle detected by steering angle sensor

PRESS SENSOR
(bar)

×

Brake fluid pressure detected by pressure sensor

ENGINE RPM
[tr/min (rpm)]

×

Engine speed

FLUID LEV SW
(On/Off)

×

Brake fluid level switch signal status

PARK BRAKE SW
(On/Off)

×

Parking brake switch signal status

FR RH IN SOL
(On/Off)

×

Operation status of each solenoid valve

FR RH OUT SOL
(On/Off)

×

FR LH IN SOL
(On/Off)

×

FR LH OUT SOL
(On/Off)

×

RR RH IN SOL
(On/Off)

×

RR RH OUT SOL
(On/Off)

×

RR LH IN SOL
(On/Off)

×

RR LH OUT SOL
(On/Off)

×

MOTOR RELAY
(On/Off)

×

Motor and motor relay operation

ACTUATOR RLY
(On/Off)

×

Actuator relay operation

ABS WARN LAMP
(On/Off)

×

ABS warning lamp

OFF LAMP
(On/Off)

×

VDC OFF indicator lamp

SLIP LAMP
(On/Off)

×

SLIP indicator lamp

BST OPER SIG

Not applied but displayed.

EBD SIGNAL
(On/Off)

EBD operation

Monitor item (Unit)

SELECT MONITOR ITEM

Remarks

ECU INPUT 

SIGNALS

MAIN SIGNLAS

BRC-28

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

ACTIVE TEST MODE

CAUTION:

• Do not perform active test while driving vehicle.
• Make sure to completely bleed air from brake system.
• The active test cannot be performed with the ABS warning lamp, VDC OFF indicator lamp, SLIP indi-

cator lamp and brake warning lamp are on.

• ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are on

during active test.

NOTE:
• When active test is performed while depressing the pedal, the pedal depression amount will change. This is

normal. (Only solenoid valve and ABS motor.)

• “TEST IS STOPPED” is displayed 10 seconds after operation start.
• After “TEST IS STOPPED” is displayed, to perform test again.

Test Item

ABS SOLENOID VALVE

• Touch “Up”, “Keep” and “Down”. Then use screen monitor to check that solenoid valve operates as shown in

the table below.

ABS SIGNAL
(On/Off)

ABS operation

TCS SIGNAL
(On/Off)

TCS operation

VDC SIGNAL
(On/Off)

VDC operation

EBD FAIL SIG
(On/Off)

EBD fail-safe signal

ABS FAIL SIG
(On/Off)

ABS fail-safe signal

TCS FAIL SIG
(On/Off)

TCS fail-safe signal

VDC FAIL SIG
(On/Off)

VDC fail-safe signal

CRANKING SIG
(On/Off)

Crank operation

USV [FR-RL]
(On/Off)

VDC switch-over valve

USV [FL-RR]
(On/Off)

HSV [FR-RL]
(On/Off)

HSV [FL-RR]
(On/Off)

V/R OUTPUT
(On/Off)

Solenoid valve relay activated

M/R OUTPUT
(On/Off)

Actuator motor and motor relay activated

Monitor item (Unit)

SELECT MONITOR ITEM

Remarks

ECU INPUT 

SIGNALS

MAIN SIGNLAS

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

BRC-29

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

*: On for 1 to 2 seconds after the touch, and then Off.

NOTE:

A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an
operation for checking.

ABS SOLENOID VALVE (ACT)

• Touch “Up”, “ACT UP” and “ACT KEEP”. Then use screen monitor to check that solenoid valve operates as

shown in the table below.

*: On for 1 to 2 seconds after the touch, and then Off.

NOTE:

Test item

Display item

(Note)

Display

Up

Keep

Down

FR RH SOL

FR RH IN SOL

Off

On

On

FR RH OUT SOL

Off

Off

On*

USV [FR-RL]

Off

Off

Off

HSV [FR-RL]

Off

Off

Off

FR LH SOL

FR LH IN SOL

Off

On

On

FR LH OUT SOL

Off

Off

On*

USV [FL-RR]

Off

Off

Off

HSV [FL-RR]

Off

Off

Off

RR RH SOL

RR RH IN SOL

Off

On

On

RR RH OUT SOL

Off

Off

On*

USV [FL-RR]

Off

Off

Off

HSV [FL-RR]

Off

Off

Off

RR LH SOL

RR LH IN SOL

Off

On

On

RR LH OUT SOL

Off

Off

On*

USV [FR-RL]

Off

Off

Off

HSV [FR-RL]

Off

Off

Off

Test item

Display item

(Note)

Display

Up

ACT UP

ACT KEEP

FR RH ABS SOLENOID 
(ACT)

FR RH IN SOL

Off

Off

Off

FR RH OUT SOL

Off

Off

Off

USV [FR-RL]

Off

On

On

HSV [FR-RL]

Off

On*

Off

FR LH ABS SOLENOID 
(ACT)

FR LH IN SOL

Off

Off

Off

FR LH OUT SOL

Off

Off

Off

USV [FL-RR]

Off

On

On

HSV [FL-RR]

Off

On*

Off

RR RH ABS SOLENOID 
(ACT)

RR RH IN SOL

Off

Off

Off

RR RH OUT SOL

Off

Off

Off

USV [FL-RR]

Off

On

On

HSV [FL-RR]

Off

On*

Off

RR LH ABS SOLENOID 
(ACT)

RR LH IN SOL

Off

Off

Off

RR LH OUT SOL

Off

Off

Off

USV [FR-RL]

Off

On

On

HSV [FR-RL]

Off

On*

Off