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Nissan Maxima. Manual - part 250

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

BRC-21

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

BRC

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

CONSULT Function (ABS)

INFOID:0000000010049037

FUNCTION

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

SELF DIAGNOSTIC RESULT 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,

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 in “ON” position.

Display Item List

Refer to

BRC-82, "DTC No. Index"

DATA MONITOR

Display Item List

Diagnostic test mode

Function

ECU Identification

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

Self Diagnostic Result

Displays ABS actuator and electric unit (control unit) self-diagnosis results.

Data Monitor

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

Active Test

Operation of electrical loads can be checked by sending drive signals to them.

Work support

Supports inspections and adjustments. Commands are transmitted to the ABS actuator and
electric unit (control unit) for setting the status suitable for required operation, input/output sig-
nals are received from the ABS actuator and electric unit (control unit) and received data is dis-
played.

CAN Diag Support Monitor

The result 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

FR LH SENSOR
(km/h, mph)

Wheel speed (km/h, mph) calculated by front LH
wheel sensor signal is displayed.

FR RH SENSOR
(km/h, mph)

Wheel speed (km/h, mph) calculated by front RH
wheel sensor signal is displayed.

RR LH SENSOR
(km/h, mph)

Wheel speed (km/h, mph) calculated by rear LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, mph)

Wheel speed (km/h, mph) calculated by rear RH
wheel sensor signal is displayed.

BRC-22

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

FR RH IN SOL
(On/Off)

—

Front RH IN ABS solenoid (On/Off) status is dis-
played.

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 dis-
played.

FR LH OUT SOL
(On/Off)

—

Front LH OUT ABS solenoid (On/Off) status is dis-
played.

RR RH IN SOL
(On/Off)

—

Rear RH IN ABS solenoid (On/Off) status is dis-
played.

RR RH OUT SOL
(On/Off)

—

Rear RH OUT ABS solenoid (On/Off) status is dis-
played.

RR LH IN SOL
(On/Off)

—

Rear LH IN ABS solenoid (On/Off) status is dis-
played.

RR LH OUT SOL
(On/Off)

—

Rear LH OUT ABS solenoid (On/Off) status is dis-
played.

EBD WARN LAMP
(On/Off)

—

EBD warning lamp (On/Off) status 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 dis-
played.

ACTUATOR RLY
(On/Off)

—

ABS actuator relay signal (On/Off) status is dis-
played.

ABS WARN LAMP
(On/Off)

—

ABS warning lamp (On/Off) status is displayed.

OFF LAMP
(On/Off)

—

VDC OFF lamp (On/Off) status is displayed.

SLIP LAMP
(On/Off)

—

SLIP indicator lamp (On/Off) status is displayed.

BATTERY VOLT
(V)

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

GEAR
(1, 2, 3, 4, 5, 6)

Gear position (1, 2, 3, 4, 5, 6) while in manual
mode determined by TCM is displayed.

SLCT LVR POSI
(N/P, R, N/P, D)

Selector lever position judged by PNP switch sig-
nal.

YAW RATE SEN
(d/s)

Yaw rate (d/s) detected by yaw rate sensor is dis-
played.

ACCEL POS SIG
(%)

—

Throttle valve open/close (%) status judged by
CAN communication signal is displayed.

SIDE G-SENSOR
(m/s

)

—

Lateral acceleration (m/s

) detected by side G

sensor is displayed.

STR ANGLE SIG
(deg)

—

Steering angle (deg) detected by steering angle
sensor is displayed.

PRESS SENSOR
(bar)

—

Brake fluid pressure detected by pressure 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.

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

BRC-23

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

BRC

×: Applicable
–: Not applicable

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 indicator lamp, SLIP indicator

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 “MAIN SIGNALS” 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.

EBD FAIL SIG
(On/Off)

—

EBD fail signal (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)

—

Cranking condition (On/Off) status is displayed.

FLUID LEV SW
(On/Off)

—

Brake fluid level switch (On/Off) status is dis-
played.

PARK BRAKE SW
(On/Off)

—

Parking brake switch (On/Off) status is displayed.

USV[FL-RR]
(On/Off)

—

Primary side USV solenoid valve (On/Off) status is
displayed.

USV[FR-RL]
(On/Off)

—

Secondary side USV solenoid valve (On/Off) sta-
tus is displayed.

HSV[FL-RR]
(On/Off)

—

Primary side HSV solenoid valve (On/Off) status is
displayed.

HSV[FR-RL]
(On/Off)

—

Secondary side HSV solenoid valve (On/Off) sta-
tus is displayed.

V/R OUTPUT
(On/Off)

—

Valve relay operation signal (On/Off) status is dis-
played.

M/R OUTPUT
(On/Off)

—

Motor relay operation signal (On/Off) status is dis-
played.

ENGINE RPM
(tr/min)

—

Engine speed judged by CAN communication sig-
nal is displayed.

BRC-24

< SYSTEM DESCRIPTION >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL

UNIT)]

Operation

ABS solenoid valve

ABS solenoid valve (ACT)

Keep

Down

ACT UP

ACT KEEP

FR RH SOL

FR RH IN SOL

Off

—

FR RH OUT SOL

Off

On*

—

USV[FL-RR]

Off

On*

—

USV[FR-RL]

Off

On*

—

HSV[FL-RR]

Off

On*

—

HSV[FR-RL]

Off

On*

—

FR LH SOL

FR LH IN SOL

Off

—

FR LH OUT SOL

Off

On*

—

USV[FL-RR]

Off

On*

—

USV[FR-RL]

Off

On*

—

HSV[FL-RR]

Off

On*

—

HSV[FR-RL]

Off

On*

—

RR RH SOL

RR RH IN SOL

Off

—

RR RH OUT SOL

Off

On*

—

USV[FL-RR]

Off

On*

—

USV[FR-RL]

Off

On*

—

HSV[FL-RR]

Off

On*

—

HSV[FR-RL]

Off

On*

—

RR LH SOL

RR LH IN SOL

Off

—

RR LH OUT SOL

Off

On*

—

USV[FL-RR]

Off

On*

—

USV[FR-RL]

Off

On*

—

HSV[FL-RR]

Off

On*

—

HSV[FR-RL]

Off

On*

—

FR RH ABS SOLENOID (ACT)

FR RH IN SOL

—

Off

FR RH OUT SOL

—

Off

USV[FL-RR]

—

Off

USV[FR-RL]

—

Off

HSV[FL-RR]

—

Off

HSV[FR-RL]

—

Off

On*

Off

FR LH ABS SOLENOID (ACT)

FR LH IN SOL

—

Off

FR LH OUT SOL

—

Off

USV[FL-RR]

—

Off

USV[FR-RL]

—

Off

HSV[FL-RR]

—

Off

HSV[FR-RL]

—

Off

On*

Off

RR RH ABS SOLENOID (ACT)

RR RH IN SOL

—

Off

RR RH OUT SOL

—

Off

USV[FL-RR]

—

Off

USV[FR-RL]

—

Off

HSV[FL-RR]

—

Off

HSV[FR-RL]

—

Off

On*

Off

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