Nissan Quest E52. Manual - part 234

SYSTEM

BRC-29

< SYSTEM DESCRIPTION >

[WITH VDC]

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SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

*: Communication line between yaw rate/side G sensor and ABS actuator and electric unit (control unit)

JSFIA0971GB

Component

Signal description

Yaw rate/side G sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via com-

munication line

*

.

• Yaw rate signal
• Side G sensor signal

ECM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Acceleration pedal position signal
• Engine speed signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication.
• Target throttle position signal

TCM

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Shift position signal
• Current gear position signal
• P range signal
• R range signal
• N range signal

Steering angle sensor

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Steering angle sensor signal

Combination meter

Mainly transmits the following signals to ABS actuator and electric unit (control unit) via CAN 
communication.
• Brake fluid level switch signal
Mainly receives the following signals from ABS actuator and electric unit (control unit) via CAN 
communication.
• VDC warning lamp signal

BRC-30

< SYSTEM DESCRIPTION >

[WITH VDC]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

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

CONSULT Function

INFOID:0000000009651365

APPLICATION ITEMS

CONSULT can display each diagnostic item using the diagnostic test modes as follows.

*: The following diagnosis information is erased by erasing.

• DTC

• Freeze frame data (FFD)

ECU IDENTIFICATION

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

SELF DIAGNOSTIC RESULT

Refer to 

BRC-38, "DTC Index"

.

When “CRNT” is displayed on self-diagnosis result

• The system is presently malfunctioning.

When “PAST” is displayed on self-diagnosis result

• System malfunction in the past is detected, but the system is presently normal.

Freeze frame data (FFD)

When DTC is detected, a vehicle state shown below is recorded and displayed on CONSULT.

DATA MONITOR

NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.

×

: Applicable

Mode

Function description

ECU identification

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

Self Diagnostic Result

Self-diagnostic results and freeze frame data 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 in which CONSULT drives some actuators apart from the ABS actuator and elec-
tric unit (control unit) and also shifts some parameters in a specified range.

Function Test

Although “Function Test” is selectable, do not use its.

Work support

Components can be quickly and accurately adjusted.

Item name

Display item

IGN counter
(0 

−

 39)

The number of times that ignition switch is turned ON after the DTC is detected is displayed.
• When “0” is displayed: It indicates that the system is presently malfunctioning.
• When except “0” is displayed: It indicates that system malfunction in the past is detected, but the system is pres-

ently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1 

→

 2 

→

 3...38 

→

 39. When 

the operation number of times exceeds 39, the number do not increase and “39” is displayed until self-diagnosis 
is erased.

Item (Unit)

Monitor item selection

Note

ECU INPUT SIGNALS

MAIN SIGNALS

FR LH SENSOR
[km/h (MPH)]

×

×

Wheel speed calculated by front LH wheel sensor is dis-
played.

FR RH SENSOR
[km/h (MPH)]

×

×

Wheel speed calculated by front RH wheel sensor is dis-
played.

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

BRC-31

< SYSTEM DESCRIPTION >

[WITH VDC]

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RR LH SENSOR
[km/h (MPH)]

×

×

Wheel speed calculated by rear LH wheel sensor is dis-
played.

RR RH SENSOR
[km/h (MPH)]

×

×

Wheel speed calculated by rear RH wheel sensor is dis-
played.

FR RH IN SOL
(On/Off)

×

Operation status of front RH wheel ABS IN valve is dis-
played.

FR RH OUT SOL
(On/Off)

×

Operation status of front RH wheel ABS OUT valve is dis-
played.

FR LH IN SOL
(On/Off)

×

Operation status of front LH wheel ABS IN valve is dis-
played.

FR LH OUT SOL
(On/Off)

×

Operation status of front LH wheel ABS OUT valve is dis-
played.

RR RH IN SOL
(On/Off)

×

Operation status of rear RH wheel ABS IN valve is dis-
played.

RR RH OUT SOL
(On/Off)

×

Operation status of rear RH wheel ABS OUT valve is dis-
played.

RR LH IN SOL
(On/Off)

×

Operation status of rear LH wheel ABS IN valve is dis-
played.

RR LH OUT SOL
(On/Off)

×

Operation status of rear LH wheel ABS OUT valve is dis-
played.

EBD WARN LAMP
(On/Off)

Brake warning lamp ON/OFF status is displayed. 

*

STOP LAMP SW
(On/Off)

×

×

Stop lamp switch signal input status is displayed.

MOTOR RELAY
(On/Off)

×

ABS motor and motor relay status is displayed.

ACTUATOR RLY
(On/Off)

×

ABS actuator relay status is displayed.

ABS WARN LAMP
(On/Off)

×

ABS warning lamp ON/OFF status is displayed. 

*

OFF LAMP
(On/Off)

×

VDC OFF indicator lamp ON/OFF status is displayed. 

*

OFF SW
(On/Off)

×

×

VDC OFF switch signal input status is displayed.

SLIP/VDC LAMP
(On/Off)

×

VDC warning lamp ON/OFF status is displayed. 

*

BATTERY VOLT
(V)

×

×

Voltage supplied to ABS actuator and electric unit (control 
unit) is displayed.

GEAR

×

×

Current gear position judged from current gear position 
signal is displayed.

SLCT LVR POSI

×

×

Current shift position judged from shift position signal is 
displayed.

ENGINE SPEED
[tr/min (rpm)]

×

×

Engine speed status is displayed.

YAW RATE SEN
(d/s)

×

×

Yaw rate detected by yaw rate sensor is displayed.

R POSI SIG
(On/Off)

R range signal input status judged from R range signal is 
displayed.

N POSI SIG
(On/Off)

N range signal input status judged from N range signal is 
displayed.

P POSI SIG
(On/Off)

P range signal input status judged from P range signal is 
displayed.

Item (Unit)

Monitor item selection

Note

ECU INPUT SIGNALS

MAIN SIGNALS

BRC-32

< SYSTEM DESCRIPTION >

[WITH VDC]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

*: Refer to 

BRC-13, "System Description"

 for ON/OFF conditions of each warning lamp and indicator lamp.

ACTIVE TEST

The active test is used to determine and identify details of a malfunction, based on self-diagnosis test result
sand data obtained in the DATA MONITOR. In response to instructions from CONSULT, instead of those from
ABS actuator and electric unit (control unit) on the vehicle, a drive signal is sent to the actuator to check its
operation.

CAUTION:

• Never perform ACTIVE TEST while driving the vehicle.
• Always bleed air from brake system before ACTIVE TEST.
• Never perform ACTIVE TEST when system is malfunctioning.
NOTE:
• When active test is performed while depressing the pedal, the pedal depressing stroke may change. This is

not a malfunction.

• “TEST IS STOPPED” is displayed approx. 10 seconds after operation start.
• When performing active test again after “TEST IS STOPPED” is displayed, select “BACK”.
• ABS warning lamp and brake warning lamp may turn ON during active test. This is not a malfunction.

CV1
(On/Off)

Cut valve 1 operation status is displayed.

CV2
(On/Off)

Cut valve 2 operation status is displayed.

SV1
(On/Off)

Suction valve 1 operation status is displayed.

SV2
(On/Off)

Suction valve 2 operation status is displayed.

ACCEL POS SIG
(%)

×

Displays the Accelerator pedal position

SIDE G-SENSOR
(m/s2)

×

Side G detected by side G sensor is displayed.

STR ANGLE SIG
(deg)

×

Steering angle detected by steering angle sensor is dis-
played.

PRESS SENSOR
(bar)

×

Brake fluid pressure detected by pressure sensor is dis-
played.

EBD SIGNAL
(On/Off)

EBD operation status is displayed.

ABS SIGNAL
(On/Off)

ABS operation status is displayed.

TCS SIGNAL
(On/Off)

TCS operation status is displayed.

VDC SIGNAL
(On/Off)

VDC operation status is displayed.

EBD FAIL SIG
(On/Off)

EBD fail-safe signal status is displayed.

ABS FAIL SIG
(On/Off)

ABS fail-safe signal status is displayed.

TCS FAIL SIG
(On/Off)

TCS fail-safe signal status is displayed.

VDC FAIL SIG
(On/Off)

VDC fail-safe signal status is displayed.

CRANKING SIG
(On/Off)

Cranking status is displayed.

FLUID LEV SW
(On/Off)

×

Brake fluid level signal input status via CAN communica-
tion is displayed.

Item (Unit)

Monitor item selection

Note

ECU INPUT SIGNALS

MAIN SIGNALS