Nissan Pathfinder (2008 year). Manual — part 89

BRC-18

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

TCS

TCS

System Diagram

INFOID:0000000001690802

System Description

INFOID:0000000001690803

• Traction Control System is a function that electronically controls engine torque, brake fluid pressure and A/T

gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4
wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels (rear
wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid pres-
sure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by
the control unit. Further more, throttle position is continuously controlled to ensure the optimum engine
torque at all times.

• During TCS operation, it informs driver of system operation by flashing SLIP indicator lamp.
• Electrical system diagnosis by CONSULT-III is available.
• Active booster, delta stroke sensor, rear pressure sensor and stop lamp relay are available on vehicles

equipped with VK56DE only.

AWFIA0012GB

ABS

BRC-19

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

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ABS

System Diagram

INFOID:0000000001690806

System Description

INFOID:0000000001690807

• Anti-Lock Braking System is a function that detects wheel revolution while braking, electronically controls

braking force, and prevents wheel locking during sudden braking. It improves handling stability and maneu-
verability for avoiding obstacles.

• Electrical system diagnosis by CONSULT-III is available.

AWFIA0014GB

BRC-20

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

EBD

EBD

System Diagram

INFOID:0000000001690810

System Description

INFOID:0000000001690811

• Electric Brake force Distribution is a following function. ABS actuator and electric unit (control unit) detects

subtle slippages between the front and rear wheels during braking. Then it electronically controls the rear
braking force (brake fluid pressure) to reduce rear wheel slippage. Accordingly, it improves vehicle stability.

• Electrical system diagnosis by CONSULT-III is available.

AWFIA0014GB

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

BRC-21

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

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DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
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CONSULT-III Function (ABS)

INFOID:0000000001690814

FUNCTION

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

SELF-DIAG RESULTS MODE

Operation Procedure

1.

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

How to Erase Self-diagnosis Results

1.

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 indicator 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
system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approxi-
mately 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-106, "DTC No. Index"

.

DATA MONITOR MODE

Display Item List

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.

CAN diagnostic support monitor

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

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

GEAR

×

×

×

Gear position judged by PNP switch
signal is displayed.

FR RH SENSOR
(km/h, MPH)

×

×

×

Wheel speed calculated by front RH
wheel sensor signal is displayed.

FR LH SENSOR
(km/h, MPH)

×

×

×

Wheel speed calculated by front LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, MPH)

×

×

×

Wheel speed calculated by rear RH
wheel sensor signal is displayed.

BRC-22

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

RR LH SENSOR
(km/h, MPH)

×

×

×

Wheel speed calculated by rear LH
wheel sensor signal is displayed.

BATTERY VOLT
(V)

×

×

×

Voltage supplied to ABS actuator
and electric unit (control unit) is dis-
played.

N POSI SIG

–

–

×

Shift position judged by PNP switch
signal.

P POSI SIG

–

–

×

Shift position judged by PNP switch
signal.

ACCEL POS SIG
(%)

×

–

×

Throttle valve open/close status
judged by CAN communication sig-
nal is displayed.

ENGINE SPEED
(rpm)

×

×

×

Engine speed judged by CAN com-
munication signal is displayed.

STR ANGLE SIG
(deg)

×

–

×

Steering angle detected by steering
angle sensor is displayed.

YAW RATE SEN
(d/s)

×

×

×

Yaw rate detected by yaw rate sen-
sor is displayed.

SIDE G-SENSOR

(m/s

2

)

×

–

×

Transverse acceleration detected
by side G-sensor is displayed.

STOP LAMP SW
(ON/OFF)

×

×

×

Stop lamp switch (ON/OFF) status
is displayed.

OFF SW
(ON/OFF)

×

×

×

VDC OFF switch (ON/OFF) status
is displayed.

ABS WARN LAMP
(ON/OFF)

–

×

×

ABS warning lamp (ON/OFF) status
is displayed.

SLIP LAMP
(ON/OFF)

–

×

×

SLIP indicator lamp (ON/OFF) sta-
tus is displayed.

FR LH IN SOL
(ON/OFF)

–

×

×

Front LH IN ABS solenoid (ON/
OFF) status is displayed.

FR LH OUT SOL
(ON/OFF)

–

×

×

Front LH OUT ABS solenoid (ON/
OFF) status is displayed.

RR RH IN SOL
(ON/OFF)

–

×

×

Rear RH IN ABS solenoid (ON/
OFF) status is displayed.

RR RH OUT SOL
(ON/OFF)

–

×

×

Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.

FR RH IN SOL
(ON/OFF)

–

×

×

Front RH IN ABS solenoid (ON/
OFF) status is displayed.

FR RH OUT SOL
(ON/OFF)

–

×

×

Front RH OUT ABS solenoid (ON/
OFF) status is displayed.

RR LH IN SOL
(ON/OFF)

–

×

×

Rear LH IN ABS solenoid (ON/OFF)
status is displayed.

RR LH OUT SOL
(ON/OFF)

–

×

×

Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.

OFF LAMP
(ON/OFF)

–

×

×

OFF Lamp (ON/OFF) status is dis-
played.

MOTOR RELAY
(ON/OFF)

–

×

×

ABS motor relay signal (ON/OFF)
status is displayed.

ACTUATOR RLY
(ON/OFF)

–

×

×

ABS actuator relay signal (ON/OFF)
status is displayed.

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

BRC-23

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

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CV1
(ON/OFF)

–

–

×

Front side switch-over solenoid
valve (cut valve) (ON/OFF) status is
displayed.

CV2
(ON/OFF)

–

–

×

Rear side switch-over solenoid
valve (cut-valve) (ON/OFF) status is
displayed.

SV1
(ON/OFF)

–

–

×

Front side switch-over solenoid
valve (suction valve) (ON/OFF) sta-
tus is displayed.

SV2
(ON/OFF)

–

–

×

Rear side switch-over solenoid
valve (suction valve) (ON/OFF) sta-
tus is displayed.

VDC FAIL SIG
(ON/OFF)

–

–

×

VDC fail signal (ON/OFF) status is
displayed.

TCS FAIL SIG
(ON/OFF)

–

–

×

TCS fail signal (ON/OFF) status is
displayed.

ABS FAIL SIG
(ON/OFF)

–

–

×

ABS fail signal (ON/OFF) status is
displayed.

EBD FAIL SIG
(ON/OFF)

–

–

×

EBD fail signal (ON/OFF) status is
displayed.

FLUID LEV SW
(ON/OFF)

×

–

×

Brake fluid level switch (ON/OFF)
status is displayed.

EBD SIGNAL
(ON/OFF)

–

–

×

EBD operation (ON/OFF) status is
displayed.

ABS SIGNAL
(ON/OFF)

–

–

×

ABS operation (ON/OFF) status is
displayed.

TCS SIGNAL
(ON/OFF)

–

–

×

TCS operation (ON/OFF) status is
displayed.

VDC SIGNAL
(ON/OFF)

–

–

×

VDC operation (ON/OFF) status is
displayed.

EBD WARN LAMP

–

–

×

Brake warning lamp (ON/OFF) sta-
tus is displayed.

SLCT LVR POSI

×

×

×

Shift position judged by PNP switch
signal.

R POSI SIG

–

–

×

Shift position judged by PNP switch
signal.

2WD/4WD

–

–

×

It recognizes on software whether it
is 2WD and whether it is in 4WD
state.

BST OPER SIG

–

–

×

Active booster operation (ON/OFF)
status is displayed.

PRESS SENSOR

×

–

×

Brake pressure detected by pres-
sure sensor is displayed.

CRANKING SIG

–

–

×

The input state of the key SW
START position signal is displayed.

PRESS SEN 2

–

–

×

Brake pressure detected by pres-
sure sensor is displayed.

DELTA S SEN

–

–

×

The amount of stroke sensor move-
ments in the active booster detected
by DELTA S SEN is displayed.

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

BRC-24

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

×

: Applicable

–: Not applicable

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 or brake warning lamp 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, touch BACK.

Test Item

SOLENOID VALVE

• When performing an active test of the ABS function, select the “MAIN SIGNALS” for each test item. In addi-

tion, when performing an active test of the VDC/TCS function, select the item menu for each test item.

• For ABS solenoid valve, touch “UP”, “KEEP”, and “DOWN” on the display screen. For ABS solenoid valve

(ACT), touch “UP”, “ACT UP”, “ACT KEEP” and confirm that solenoid valves operate as shown in the table
below.

RELEASE SW NO

–

–

×

Release switch signal (ON/OFF)
status is displayed. “ON” indicates
that the brake pedal is depressed.
“OFF”“ is that the brake pedal is re-
leased.

RELEASE SW NC

–

–

×

Release switch signal (ON/OFF)
status is displayed. “OFF” indicates
that the brake pedal is depressed
on. “ON” is that the brake pedal is
released.

OHB FAIL

–

–

×

OHB fail status is displayed.

HBA FAIL

–

–

×

HBA fail status is displayed.

OHB SIG

–

–

×

OHB operation (ON/OFF) status is
displayed.

HBA SIG

–

–

×

HBA operation (ON/OFF) status is
displayed.

PRES CTRL ACC

–

–

×

This item is not used for this model.

PRES FAIL ACC

–

–

×

This item is not used for this model.

STP OFF RLY

–

–

×

Stop lamp relay signal (ON/OFF)
status is displayed.

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

Operation

ABS solenoid valve

ABS solenoid valve (ACT)

UP

KEEP

DOWN

UP

ACTUA-
TOR UP

ACTUA-

TOR KEEP

FR RH SOL
FR RH ABS SOLE-
NOID (ACT)

FR RH IN SOL

OFF

ON

ON

OFF

OFF

OFF

FR RH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

FR LH SOL
FR LH ABS SOLE-
NOID (ACT)

FR LH IN SOL

OFF

ON

ON

OFF

OFF

OFF

FR LH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

BRC-25

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

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*: ON for 1 to 2 seconds after the touch, and then OFF

ABS MOTOR

• Touch “ON” and “OFF” on screen. Make sure motor relay and actuator relay operates as shown in table

below.

BOOSTER DRIVE

• Touch “UP” and “DOWN” on the screen. Check that booster drive operates as shown in table below.

CAUTION:

Perform active test subject to the conditions below.
• Do not operate brake pedal during active test.
• Make sure the engine revolution is over 500 rpm.
• Make sure the vehicle is not moving.

RR RH SOL
RR RH ABS SOLE-
NOID (ACT)

RR RH IN SOL

OFF

ON

ON

OFF

OFF

OFF

RR RH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

RR LH SOL
RR LH ABS SOLE-
NOID (ACT)

RR LH IN SOL

OFF

ON

ON

OFF

OFF

OFF

RR LH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

REAR SOL

RR RH IN SOL

OFF

ON

ON

OFF

OFF

OFF

RR RH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

RR LH IN SOL

OFF

ON

ON

OFF

OFF

OFF

RR LH OUT SOL

OFF

OFF

ON*

OFF

OFF

OFF

Operation

ON

OFF

MOTOR RELAY

ON

OFF

ACTUATOR RLY

ON

ON

Operation

UP

DOWN

STOP LAMP SW

ON

OFF

BST OPER SIG

ON

OFF

PRESS SENSOR

50

±

5 bar

0 bar

PRESS SEN 2

50

±

5 bar

0 bar

STP OFF RLY

OFF

OFF

Operation

ABS solenoid valve

ABS solenoid valve (ACT)

UP

KEEP

DOWN

UP

ACTUA-
TOR UP

ACTUA-

TOR KEEP