Nissan Xterra. Manual - part 93

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

BRC-29

< SYSTEM DESCRIPTION >

[TYPE 1]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

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

CONSULT Function (ABS)

INFOID:0000000009482581

FUNCTION

CONSULT can display each diagnostic item using the following direct diagnostic modes.

SELF DIAGNOSTIC RESULT

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,

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 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

Direct Diagnostic Mode

Description

ECU Identification

The ABS actuator and electric unit (control unit) part number is displayed.

Self Diagnostic Result

The ABS actuator and electric unit (control unit) self diagnostic results are displayed.

Data Monitor

The ABS actuator and electric unit (control unit) input/output data is displayed in real time.

Active Test

The ABS actuator and electric unit (control unit) activates outputs to test components.

Work support

The settings for ABS actuator and electric unit (control unit) functions can be changed.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT 

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

FR LH SENSOR 
 (km/h, mph)

×

×

×

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

FR RH SENSOR 
 (km/h, mph)

×

×

×

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

RR LH SENSOR 
 (km/h, mph)

×

×

×

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

RR RH SENSOR
 (km/h, mph)

×

×

×

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

DECEL G-SEN
(G)

×

×

×

Longitudinal acceleration detected 
by decel G-sensor is displayed.

BRC-30

< SYSTEM DESCRIPTION >

[TYPE 1]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

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.

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.

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.

EBD WARN LAMP
(ON/OFF)

–

–

×

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

STOP LAMP SW
(ON/OFF)

×

×

×

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

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.

ABS WARN LAMP
(ON/OFF)

–

×

×

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

OFF LAMP
(ON/OFF)

–

×

×

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

OFF  SW
(ON/OFF)

 

×

×

×

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

SLIP LAMP
(ON/OFF)

–

×

×

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

BATTERY VOLT
(V)

×

×

×

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

ENGINE SPEED
(rpm)

×

×

×

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

YAW RATE SEN
(d/s)

×

×

×

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

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.

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-31

< SYSTEM DESCRIPTION >

[TYPE 1]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

×: Applicable
–: Not applicable

WORK SUPPORT

ACTIVE TEST

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.

2WD/4WD
(2WD/4WD)

–

–

×

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

ACCEL POS SIG
(%)

×

–

×

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

SIDE G-SENSOR
 (m/s

2

)

×

–

 

×

Transverse acceleration detected 
by side G-sensor is displayed. 

STR ANGLE SIG
(deg)

×

–

×

Steering angle detected by steering 
angle sensor is displayed.

PRESS SENSOR
(bar)

×

–

×

Brake pressure detected by pres-
sure sensor 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.

ABS FAIL SIG
(ON/OFF)

–

–

×

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

TCS FAIL SIG
(ON/OFF)

–

–

×

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

VDC FAIL SIG
(ON/OFF)

–

–

×

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

CRANKING SIG
(ON/OFF)

–

–

×

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

FLUID LEV SW
(ON/OFF)

×

–

×

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

Item

(Unit)

Data monitor item selection

Remarks

ECU INPUT 

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

Conditions

Description

ST ANGLE SENSOR ADJUSTMENT

Steering angle sensor neutral position adjustment can be per-
formed. Refer to 

BRC-12, "ADJUSTMENT OF STEERING AN-

GLE SENSOR NEUTRAL POSITION : Description"

.

DECEL G SEN CALIBRATION

Decel G sensor calibration can be performed. Refer to 

BRC-13, 

"CALIBRATION OF DECEL G SENSOR : Description"

.

BRC-32

< SYSTEM DESCRIPTION >

[TYPE 1]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

• 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.

*: 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 operate as shown in table below.

Operation

ABS solenoid valve

ABS solenoid valve (ACT)

Up

Keep

Down

Up

ACT UP

ACT KEEP

FR RH SOL

FR RH IN SOL

Off

On

On

—

—

—

FR RH OUT SOL

Off

Off

On*

—

—

—

FR LH SOL

FR LH IN SOL

Off

On

On

—

—

—

FR LH OUT SOL

Off

Off

On*

—

—

—

RR RH SOL

RR RH IN SOL

Off

On

On

—

—

—

RR RH OUT SOL

Off

Off

On*

—

—

—

RR LH SOL

RR LH IN SOL

Off

On

On

—

—

—

RR LH OUT SOL

Off

Off

On*

—

—

—

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

FR RH ABS SOLENOID (ACT)

FR RH IN SOL

—

—

—

Off

Off

Off

FR RH OUT SOL

—

—

—

Off

Off

Off

FR LH ABS SOLENOID (ACT)

FR LH IN SOL

—

—

—

Off

Off

Off

FR LH OUT SOL

—

—

—

Off

Off

Off

RR RH ABS SOLENOID (ACT)

RR RH IN SOL

—

—

—

Off

Off

Off

RR RH OUT SOL

—

—

—

Off

Off

Off

RR LH ABS SOLENOID (ACT)

RR LH IN SOL

—

—

—

Off

Off

Off

RR LH OUT SOL

—

—

—

Off

Off

Off

Operation

On

Off

MOTOR RELAY

On

Off

ACTUATOR RLY

On

On