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Infiniti M35/M45 Y50. Manual - part 332

TROUBLE DIAGNOSIS

BRC-29

[VDC/TCS/ABS]

BRC

FR RH IN SOL
(ON/OFF)

—

Operation status of all 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

4WD FAIL REQ
(ON/OFF) (Note)

—

AWD control unit fail-safe signal

SNOW MODE SW
(ON/OFF)

—

Snow mode switch

BST OPER SIG

—

Not applied but displayed.

M-MODE SIG
(ON/OFF)

—

Manual mode activated

EBD SIGNAL
(ON/OFF)

—

EBD operation

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

Item

(Unit)

Data monitor item selection

Display content

ECU INPUT

SIGNALS

MAIN SIGNALS

SELECTION

FROM MENU

BRC-30

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

:Applicable

–:Not applicable
Note: Only AWD models

Active Test

NFS000QI

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 indica-
tor 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.

●

Erase memory of ICC system after implementing active test. Refer to

ACS-34, "Self-Diagnostic

Function"

OPERATION PROCEDURE

Perform “CONSULT-II Starting Procedure”. Refer to

GI-38, "CONSULT-II Start Procedure"

Touch “SELECT TEST ITEM” is displayed.

Touch necessary test item.

While “MAIN SIGNALS” indication is inverted, touch “START”.

“ACTIVE TEST” screen will be displayed so perform the following 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” and repeat step 3.

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

Item

(Unit)

Data monitor item selection

Display content

ECU INPUT

SIGNALS

MAIN SIGNALS

SELECTION

FROM MENU

SFIA0591E

TROUBLE DIAGNOSIS

BRC-31

[VDC/TCS/ABS]

BRC

TEST ITEMS
Solenoid Valve

NOTE:
The example shown is for front right wheel. The procedure for the other wheels is the same as given below.

●

When performing an active test of the ABS function, select the
"MAIN SIGNALS" for each test item. In addition, when perform-
ing 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 (IN,
OUT, USV, HSV) operate as shown in the table below.

*: 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 Motor

Touch “ON” and “OFF” on screen. Make sure motor relay and actua-
tor relay operates as shown in table below.

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.

SFIA0678E

Operation

(Note)

ABS solenoid valve

ABS solenoid valve (ACT)

KEEP

DOWN

ACT UP

ACT KEEP

FR RH IN SOL

OFF

FR RH OUT SOL

OFF

ON*

OFF

USV [FR-RL]

OFF

HSV [FR-RL]

OFF

ON*

OFF

Operation

OFF

MOTOR RELAY

OFF

ACTUATOR RLY (Note)

SFIA0593E

BRC-32

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

For Fast and Accurate Diagnosis

NFS000QJ

PRECAUTIONS FOR DIAGNOSIS

●

Before performing diagnosis, always read General Information (GI) to confirm general precautions. Refer
to

GI-4, "General Precautions"

●

If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit
(control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neu-
tral position of steering angle sensor before driving. Refer to

BRC-6, "Adjustment of Steering Angle Sen-

sor Neutral Position"

●

After diagnosis is finished, be sure to erase memory. Refer to

BRC-24, "ERASE MEMORY"

●

When checking continuity and voltage between unit, be sure to check for disconnection, looseness, bend,
or collapse of connector terminals. If any malfunction is found, repair or replace connector terminals.

●

For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.

●

If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.

●

The following symptoms may be caused by normal operations.

Symptom

Symptom description

Result

Motor operation sound

This is sound of motor inside VDC actuator. Slight sound may occur
during VDC, TCS, and ABS operation.

Normal

Just after engine starts, the motor operating sound may be heard.
This is a normal condition of the system operation check.

System operation check sound

When engine starts, slight “click” sound may be heard from engine
room. This is normal and is part of system operation check.

Normal

VDC/TCS operation
(SLIP indicator lamp ON)

TCS may activate momentarily if wheel speed changes when driving
over location where friction varies, when downshifting, or when fully
depressing accelerator pedal.

Normal
Cancel the VDC/TCS
function for the inspec-
tion on a chassis dyna-
mometer.

When checking speed meter etc. With a 2-wheel-drive chassis dyna-
mometer, vehicle speed is not increased by pressing down on the
accelerator.

ABS operation
(Longer stopping distance)

On roads with low friction, such as snowy roads or gravel roads, vehi-
cles with ABS may require a longer stopping distance. Therefore,
when driving on such roads, avoid overconfidence and keep speed
sufficiently low.

Normal

Insufficient feeling of acceleration

Depending on road conditions, driver may feel that feeling of acceler-
ation is insufficient. This is because traction control, which controls
engine and brakes to achieve optimal traction, has the highest priority
(for safety). As a result, there may be times when acceleration is
slightly less than usual for the same accelerator pedal operation.

Normal

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