2007 INFINITI M35 slip

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2007 April2007 M35/M45
TCS

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
pressure 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-II is available.
VDC

Vehicle Dynamics Control system detects driver's steering operation amount and brake pedal travel from
steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel
sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle driving
stability by controlling brake application to 4 wheels and engine output.

During VDC operation, it informs driver of system operation by flashing SLIP indicator lamp.

Electrical system diagnosis by CONSULT-II is available.
ECD
Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls brake
fluid pressure with the motor [built-in ABS actuator and electric unit (control unit)].
Operation That Is Not "System Error" NFS000Q7
ABS

When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating sound
may be heard from engine room. This is a normal states of the operation check.

During ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
TCS

Depending on road circumstances, driver may have a sluggish feel. This is normal, because optimum
traction has highest priority under TCS operation.

When vehicle is passing through a road where surface friction varies, downshifting or depressing acceler-
ator pedal fully may activate TCS temporarily.
VDC

During VDC operation, body and brake pedal lightly vibrate and mechanical sounds may be heard. This is
normal.

If vehicle is rotated on turn table, or rolled and rocked on ship, ABS warning lamp, VDC OFF indicator
lamp, and SLIP indicator lamp may turn on. In this case, start engine on normal road again. If ABS warn-
ing lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off after restart, it is normal.

When starting TCS or VDC under rapid acceleration or hard turn, operating sound by brake pedal is gen-
erated. However, this is not malfunction. This is because TCS and VDC are functioning normally.

VDC may not operate normally or ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp
may turn on when driving special roads with extremely steep slant (banks on circuit road and so on.) How-
ever, it is not malfunction when returning to a normal state after restarting the engine. In that case, be sure
to erase the memory of self-diagnosis. Refer to BRC-24, "
ERASE MEMORY" .

Yaw rate /side G sensor malfunction may occur under hard turn like spin turn, rapid acceleration turn, drift
run, etc., when VDC function is OFF (VDC OFF switch is turned on). It is not malfunction if it is possible to
return to a normal position after restarting engine. Then erase the memory of self-diagnosis. Refer to
BRC-24, "
ERASE MEMORY" .

VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure
warning lamp turns on. This is not a VDC system error but results from characteristic change of tires.

BRC-10
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSISPFP:00004
Fail-Safe FunctionNFS000Q8
ABS, EBD SYSTEM
In the event there is a malfunction with the electrical system, the ABS warning lamp, VDC OFF indicator lamp,
and SLIP indicator lamp will turn on when it is the ABS that is malfunctioning, and the brake warning lamp,
ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp will turn on when it is the EBD that is
malfunctioning. At the same time, the VDC/TCS/ABS will be put in one of the following states by the fail-safe
function.

When the ABS malfunctions, only the EBD operates. The condition is the same as that of models without
VDC/TCS/ABS.
NOTE:
ABS self-diagnosis sound may be heard. This is normal condition because a self-diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

When the EBD malfunctions, the EBD and ABS will not operate. The condition is the same as that of mod-
els without VDC/TCS/ABS and EBD.
VDC/TCS
In case of VDC/TCS system malfunction, the VDC OFF indicator lamp and SLIP indicator lamp or only VDC
OFF indicator lamp are turned on, and the condition of the vehicle is the same as the condition of vehicles
without VDC/TCS equipment. In case of electrical malfunction with the VDC/TCS system, the ABS control
continues to operate normally even though VDC/TCS does not operate.
CAUTION:
If the Fail-Safe function is activated, then perform self-diagnosis for VDC/TCS/ABS control system.
How to Perform Trouble DiagnosesNFS000QB
BASIC CONCEPT

The most important point to perform trouble diagnosis is to understand systems (control and mechanism)
in vehicle thoroughly.

It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
they will be necessary to check symptom by driving vehicle with
customer.
CAUTION:
Customers are not professionals. Do not assume “maybe
customer means...” or “maybe customer mentioned this
symptom”.

It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

After diagnostic, make sure to perform “ERASE MEMORY”.
Refer to BRC-24, "
ERASE MEMORY" .

Always read “GI General Information” to confirm general precau-
tions. Refer to GI-4, "
General Precautions" .
SEF234G
SEF233G

BRC-22
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
FLUID LEV SW Brake fluid level switchBrake fluid level switch ON ON
Brake fluid level switch OFF OFF
PARK BRAKE SW Parking brake switchParking brake switch is active ON
Parking brake switch is inactive OFF
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOLOperation status of all solenoid valve Actuator (solenoid valve) is active
(“ACTIVE TEST” with CONSULT-II) or
actuator relay is inactive (in fail-safe
mode)ON
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON)OFF
MOTOR RELAY Motor and motor relay operationWhen the motor relay and motor are
operatingON
When the motor relay and motor are not
operatingOFF
ACTUATOR RLY
(Note 3)Actuator relay operationWhen the actuator relay is operating ON
When the actuator relay is not operating OFF
ABS WARN LAMPABS warning lamp
(Note 4)When ABS warning lamp is ON ON
When ABS warning lamp is OFF OFF
OFF LAMPVDC OFF indicator lamp
(Note 4)When VDC OFF indicator lamp is ON ON
When VDC OFF indicator lamp is OFF OFF
SLIP LAMPSLIP indicator lamp
(Note 4)When SLIP indicator lamp is ON ON
When SLIP indicator lamp is OFF OFF
4WD FAIL REQ
(Note 2)AWD control unit fail-safe signal When AWD control unit is fail-safe mode ON
When AWD control unit is normal OFF
SNOW MODE SW Snow mode switchWhen snow mode switch is ON ON
When snow mode switch is OFF OFF
BST OPER SIG Not applied but displayed — OFF
M-MODE SIG Manual mode operationWhen the manual mode is active ON
When the manual mode is inactive OFF
EBD SIGNAL EBD operationEBD is active ON
EBD is inactive OFF
ABS SIGNAL ABS operationABS is active ON
ABS is inactive OFF
TCS SIGNAL TCS operationTCS is active ON
TCS is inactive OFF
VDC SIGNAL VDC operationVDC is active ON
VDC is inactive OFF
EBD FAIL SIG EBD fail-safe signalIn EBD fail-safe ON
EBD is normal OFF
ABS FAIL SIG ABS fail-safe signalIn ABS fail-safe ON
ABS is normal OFF
TCS FAIL SIG TCS fail-safe signalIn TCS fail-safe ON
TCS is normal OFF Monitor item Display contentData monitor
ConditionReference value in nor-
mal operation

BRC-24
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Self-DiagnosisNFS000QG
OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Perform “CONSULT-II Starting Procedure”. Refer to GI-38, "
CONSULT-II Start Procedure" .
3. Turn ignition switch ON.
4. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping vehicle, with the engine running, touch “ABS”, “SELF-DIAG RESULTS” in order on the
CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on the
ignition switch, “ABS” might not be displayed in the “SELECT SYSTEM” screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (Touch “PRINT” to print out self-diagnostic results, if necessary.)

Check ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp if “NO FAILURE” is dis-
played. Refer to BRC-50, "
Warning Lamp and Indicator Lamp Circuit" .
7. Perform the appropriate inspection from display item list, and repair or replace the malfunctioning compo-
nent.Refer to BRC-25, "
DISPLAY ITEM LIST" .
8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
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 approximately 1 minute.
ERASE MEMORY
1. Turn ignition switch OFF.
2. Start engine and touch “ABS”, “SELF-DIAG RESULTS”, “ERASE MEMORY” in order on the CONSULT-II
screen to erase the diagnostic memory.
If “ABS” is not indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the diagnostic memory is not erased, re-perform the operation from step 4.
3. Perform self-diagnosis again, and make sure that diagnostic memory is erased.
4. 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.
NOTE:

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.

TROUBLE DIAGNOSIS
BRC-29
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2007 April2007 M35/M45
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
SIGNALSMAIN SIGNALSSELECTION
FROM MENU

BRC-30
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
×:Applicable
–:Not applicable
Note: Only AWD models
Active TestNFS000QI
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
1. Perform “CONSULT-II Starting Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Touch “SELECT TEST ITEM” is displayed.
3. Touch necessary test item.
4. While “MAIN SIGNALS” indication is inverted, touch “START”.
5. “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
SIGNALSMAIN SIGNALSSELECTION
FROM MENU
SFIA0591E

BRC-32
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
For Fast and Accurate DiagnosisNFS000QJ
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 soundThis 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 soundWhen 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 accelerationDepending 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

TROUBLE DIAGNOSIS
BRC-33
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2007 April2007 M35/M45
Basic InspectionNFS000QK
BASIC INSPECTION 1: BRAKE FLUID LEVEL, LEAK INSPECTION AND BRAKE PAD
1. Check fluid level in brake reservoir tank. If fluid level is low, refill brake fluid. Refer to BR-9, "CHECKING
BRAKE FLUID LEVEL" .
2. Check for leakage in brake tubes or hoses and around ABS actuator and electric unit (control unit). If
there is leaking or seeping fluid, check the following items.

If the brake tube connections at ABS actuator and electric unit (control unit) are loose, tighten flare nuts
to the specified torque. Then inspect again and confirm that there is no leakage.

If flare nuts or screws of ABS actuator and electric unit (control unit) are damaged and loose, replace
damaged parts. Then inspect again and confirm that there is no leakage.

If there is leakage at any location other than ABS actuator and electric unit (control unit) connections,
wipe away leakage with clean cloth. Then inspect again and confirm that there is no leakage.

If there is leakage from ABS actuator and electric unit (control unit), wipe away leakage with clean cloth.
Then inspect again. If there is still leakage, replace ABS actuator and electric unit (control unit).
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3. Check brake disc rotor and pads.

Front disc rotor: Refer to BR-27, "DISC ROTOR INSPECTION" .

Front brake pad: Refer to BR-22, "PAD WEAR INSPECTION" .

Rear disc rotor: Refer to BR-33, "DISC ROTOR INSPECTION" .

Rear brake pad: Refer to BR-28, "PAD WEAR INSPECTION" .
BASIC INSPECTION 2: LOOSENESS OF POWER SYSTEM TERMINALS AND BATTERY
Check battery for looseness on battery positive/negative terminals and ground connection. Also make sure
battery voltage does not drop and alternator is normal.
BASIC INSPECTION 3: ABS WARNING LAMP, BRAKE WARNING LAMP, VDC OFF INDICATOR
LAMP AND SLIP INDICATOR LAMP
ON and OFF Timing for Warning Lamp and Indicator Lamp
×: ON –: OFF
Note1: 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).
Note2: After starting engine, brake warning lamp is turned off.
Check the following items when unsuitable for an above condition.

ABS warning lamp: BRC-48, "CAN Communication Circuit" .

Brake warning lamp: BRC-48, "CAN Communication Circuit" , BRC-46, "Brake Fluid Level Switch Circuit"
, BRC-50, "Parking Brake Switch Circuit" .

VDC OFF indicator lamp: BRC-48, "CAN Communication Circuit" , BRC-49, "VDC OFF Switch Circuit" .

SLIP indicator lamp: BRC-48, "CAN Communication Circuit" .
If malfunction is not found, refer to BRC-50, "
Warning Lamp and Indicator Lamp Circuit" .
Condition ABS warning lampVDC OFF
indicator lampSLIP indicator lampBrake warning lamp
(Note1)
Ignition switch OFF – – – –
For 1 second after turning ON ignition
switch××××
(Note 2)
1 second later after turning ON ignition
switch–––×
(Note 2)
VDC OFF switch turned ON.
(VDC function is OFF.)–×––
VDC/TCS function is malfunctioning. –××–
ABS function is malfunctioning.×××–
EBD function is malfunctioning.××××