Nissan Pathfinder (2006 year). Manual - part 125

TROUBLE DIAGNOSIS

BRC-85

[HDC/HSA/VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

2006 Pathfinder

WFWA0375E

BRC-86

[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS

2006 Pathfinder

WFWA0285E

TROUBLE DIAGNOSIS

BRC-87

[HDC/HSA/VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

2006 Pathfinder

Basic Inspection

EFS0066O

BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION

1.

Check fluid level in the brake fluid reservoir. If fluid level is low, add fluid.

2.

Check the brake piping and around the ABS actuator and electric unit (control unit) for leaks. If there is
leaking or seeping fluid, check the following items.

●

If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and recheck for leaks.

●

If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) threads,
replace the damaged part and recheck for leaks.

●

When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and
recheck for leaks. If fluid is still seeping out, replace the damaged part. If the fluid is leaking at the ABS
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assem-
bly.

CAUTION:

The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced
as an assembly.

3.

Check the brake pads for excessive wear.

POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION

Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.

ABS WARNING LAMP, SLIP INDICATOR LAMP, VDC OFF INDICATOR LAMP AND HDC INDICA-
TOR LAMP INSPECTION

1.

Make sure ABS warning lamp, SLIP indicator lamp, VDC OFF indicator lamp (when VDC OFF switch is
off) and HDC indicator lamp (when HDC switch is off), turn on for approximately 2 seconds when the igni-
tion switch is turned ON. If they do not, check the ABS warning lamp, SLIP indicator lamp, VDC OFF indi-
cator lamp and HDC indicator lamp. Check CAN communications. If there are no errors with the CAN
communication system, check combination meter. Refer to 

DI-4, "COMBINATION METERS"

 .

2.

Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis.
NOTE:

●

On 4WD vehicles, when the transfer case is placed in 4LO, the VDC system is disabled and the VDC
indicator will turn on.

●

If the battery has been disconnected, the TCS/VDC system is initialized and the SLIP and VDC OFF
indicator lamps may not turn off after 2 seconds when the ignition switch is turned ON. In this case,
refer to 

BRC-94, "SELF-DIAGNOSIS"

 .

3.

With the engine running, make sure the VDC OFF indicator lamp turns on and off when the VDC OFF
switch is turned on and off. If the indicator lamp status does not correspond to switch operation, check the
VDC OFF switch. Refer to 

BRC-120, "VDC OFF SWITCH"

 .

4.

Turn HDC switch on to confirm that HDC indicator lamp turns on. If HDC indicator lamp does not turn on,
perform self-diagnosis. Refer to 

BRC-94, "SELF-DIAGNOSIS"

 .

5.

Make sure ABS warning lamp, SLIP indicator lamp, VDC OFF indicator lamp and HDC indicator lamp turn
off approximately 2 seconds after the ignition switch is turned ON. If ABS warning lamp, SLIP indicator
lamp, VDC OFF indicator lamp and HDC indicator lamp have not turned off 2 seconds after the ignition
switch is turned ON, conduct self-diagnosis of the ABS actuator and electric unit (control unit).

6.

After conducting the self-diagnosis, be sure to erase the error memory. Refer to 

BRC-93, "CONSULT-II

Function (ABS)"

 .

BRC-88

[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS

2006 Pathfinder

For Fast and Accurate Diagnosis

EFS0066P

PRECAUTIONS FOR DIAGNOSIS

●

Before performing diagnosis, always read precautions. Refer to 

BRC-66, "PRECAUTIONS"

 .

●

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

BRC-128, "Adjustment of Steering Angle Sensor Neutral

Position"

 .

●

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

BRC-94, "SELF-DIAGNOSIS"

 .

●

When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any non-standard condition is found, repair or replace connec-
tor 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.

●

To use CONSULT-II to perform self-diagnosis of ABS actuator and electric unit (control unit), active tests,
or work support, first stop work, then connect CONSULT-II and select “ABS”.

●

CONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some cases later
ones (timing value is small) appear on the next screen.

●

When self-diagnostic results of CONSULT-II show a malfunction, if CONSULT-II active test is performed,
an engine system error may be indicated. In this case, start engine to resume the normal screen.

●

VDC/TCS/ABS system electronically controls brake operation and engine output. The following symptoms
may be caused by normal operations:

Symptom

Symptom description

Result

Motor operation noise

This is noise of motor inside ABS actuator and electric unit (control unit). 
Slight noise may occur during VDC, TCS, and ABS operation.

Normal

When the vehicle speed goes over 20 km/h (12.5 mph), the motor and 
valves operating noise may be heard. It happens only once after IGN 
(ignition) is ON. This is a normal status of the system operation check.

System operation check 
noise

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

Normal

VDC/TCS operation
(SLIP indicator lamp blink-
ing)

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

Normal
Cancel the VDC/TCS 
function for the 
inspection on a chas-
sis dynamometer.

For inspection of speedometer or other instruments, press 
VDC OFF switch to turn VDC/TCS function off.

When accelerator pedal is depressed on a chassis dynamometer (fixed 
front-wheel type), vehicle speed will not increase. This is not normal. It is 
result of TCS being activated by stationary front wheels. Warning lamp 
may also illuminate to indicate “sensor system error”. This is also nor-
mal, and is the result of the stationary front wheels being detected. To be 
certain, restart engine, and drive vehicle at 30 km/h (19 MPH) or more. 
Make sure warning lamp does not illuminate.

ABS operation (Longer stop-
ping distance)

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

Normal

Insufficient feeling of accel-
eration

Depending on road conditions, driver may feel that feeling of accelera-
tion is insufficient. This is because traction control, which controls the 
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-89

[HDC/HSA/VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

2006 Pathfinder

Warning Lamp and Indicator Timing

EFS0066Q

X: ON
—: OFF

Control Unit Input/Output Signal Standard

EFS0066R

REFERENCE VALUE FROM CONSULT-II

CAUTION:

The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short circuited.

Condition

ABS 

warning 

lamp

VDC OFF 

indicator 

lamp

SLIP 

indicator 

lamp

HDC indica-

tor lamp

Remarks

When the ignition switch is OFF

—

—

—

—

—

After the ignition switch is turned 
ON for approx. 2 seconds

×

×

×

×

—

After the ignition switch has been 
turned ON for approx. 2 seconds

—

—

—

—

—

When the VDC OFF switch is 
pressed (VDC function OFF)

—

×

—

—

—

ABS/TCS/VDC malfunction

×

×

×

—

—

When the VDC is malfunctioning

—

×

×

—

—

When HDC switch is pressed (HDC 
function ON)

—

—

—

×

4H/4L 

→

 ON, 2H 

→

 Blink

Monitor item

Display content

Data monitor

Note: Error inspection 

checklist

Condition

Reference value in 

normal operation

N POSI SIG

PNP switch signal ON/
OFF condition

A/T shift position = N position

ON

BRC-118, "CAN Commu-
nication System Inspec-
tion"

A/T shift position = other than 
N positions

OFF

P POSI SIG

PNP switch signal ON/
OFF condition

A/T shift position P position

ON

BRC-118, "CAN Commu-
nication System Inspec-
tion"

A/T shift position = other than 
P positions

OFF

GEAR

A/T gear position

1st gear

1

—

2nd gear

2

3rd gear

3

4th gear

4

5th gear

5

FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR

Wheel speed

Vehicle stopped

0 [km/h (MPH)]

BRC-103, "Wheel Sen-
sor System Inspection"

Vehicle running (Note 1)

Almost in accor-
dance with speed-
ometer display 
(within 

±

10%)

ACCEL POS SIG 

Open/close condition 
of throttle valve (linked 
with accelerator pedal).

Accelerator pedal not 
depressed (ignition switch is 
ON)

0%

BRC-118, "CAN Commu-
nication System Inspec-
tion"

Depress accelerator pedal 
(ignition switch is ON)

0 to 100%

2WD/4WD

Drive axle

2WD model

2WD

—

4WD model

4WD

BRC-90

[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS

2006 Pathfinder

ENGINE SPEED

With engine running

With engine stopped

0 RPM

BRC-104, "Engine Sys-
tem Inspection"

Engine running

Almost in accor-
dance with 
tachometer display

STR ANGLE SIG

Steering angle 
detected by steering 
angle sensor

Straight-ahead

Approx. 0 deg

BRC-105, "Steering 
Angle Sensor System"

Steering wheel turned

–756 to 756 deg

YAW RATE SEN

Yaw rate detected by 
yaw rate sensor

Vehicle stopped

Approx. 0 d/s

BRC-107, "Yaw Rate/
Side/Decel G Sensor 
System Inspection"

Vehicle running

–100 to 100 d/s

SIDE G-SENSOR

Transverse G detected 
by side G-sensor

Vehicle stopped

Approx. 0 m/s

2

BRC-107, "Yaw Rate/
Side/Decel G Sensor 
System Inspection"

Vehicle running

–16.7 to 16.7 m/s

2

BATTERY VOLT

Battery voltage sup-
plied to ABS actuator 
and electric unit (con-
trol unit)

Ignition switch ON

10 to 16V

BRC-112, "ABS/TCS/
VDC Control Unit Power 
and Ground Systems 
Inspection"

STOP LAMP SW

Stop lamp switch oper-
ation

Brake pedal depressed

ON

BRC-111, "Stop Lamp 
Switch System Inspec-
tion"

Brake pedal not depressed

OFF

OFF SW

VDC OFF switch
ON/OFF status 

VDC OFF switch ON
(When VDC OFF indicator 
lamp is ON)

ON

BRC-120, "VDC OFF 
SWITCH"

VDC OFF switch OFF
(When VDC OFF indicator 
lamp is OFF)

OFF

HDC SW

HDC switch ON/OFF 
status

HDC switch ON
(When HDC indicator lamp is 
ON or blink)

ON

BRC-126, "HDC Switch 
Inspection"

HDC switch OFF
(When HDC indicator lamp is 
OFF)

OFF

STOP LAMP ON RLY

Stop lamp relay opera-
tion status

When HDC is operating

ON

BRC-126, "Stop Lamp 
Relay Inspection"

When HDC is not operating

OFF

ABS WARN LAMP

ABS warning lamp ON 
condition (Note 2)

ABS warning lamp ON

ON

—

ABS warning lamp OFF

OFF

MOTOR RELAY

Operation status of 
motor and motor relay

Ignition switch ON or running 
(ABS not activated)

OFF

BRC-110, "Actuator 
Motor, Motor Relay, and 
Circuit Inspection"

Ignition switch ON or engine 
running (ABS activated)

ON

ACTUATOR RLY

Actuator relay opera-
tion status

Vehicle stopped (Ignition 
switch ON)

OFF

BRC-110, "Actuator 
Motor, Motor Relay, and 
Circuit Inspection"

Vehicle stopped (Engine run-
ning)

ON

OFF LAMP

VDC OFF indicator 
lamp status (Note 3) 

When VDC OFF indicator 
lamp is ON

ON

BRC-118, "CAN Commu-
nication System Inspec-
tion"

When VDC OFF indicator 
lamp is OFF

OFF

SLIP LAMP

SLIP indicator lamp 
status (Note 4)

When SLIP indicator lamp is 
ON

ON

BRC-118, "CAN Commu-
nication System Inspec-
tion"

When SLIP indicator lamp is 
OFF

OFF

Monitor item

Display content

Data monitor

Note: Error inspection 

checklist

Condition

Reference value in 

normal operation

TROUBLE DIAGNOSIS

BRC-91

[HDC/HSA/VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

2006 Pathfinder

Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of ABS warning lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected.

FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL

Solenoid valve opera-
tion

Actuator (solenoid) is active 
(“ACTIVE TEST” with CON-
SULT-II) or actuator relay is 
inactive (in fail-safe mode).

ON

BRC-109, "Solenoid and 
VDC Change-Over Valve 
System Inspection"

When actuator (solenoid) is 
not active and actuator relay is 
active (ignition switch ON).

OFF

CV1
CV2
SV1
SV2

VDC switch-over valve 
status

When actuator (switch-over 
valve) is active (“ACTIVE 
TEST” with CONSULT-II) or 
actuator relay is inactive (when 
in fail-safe mode).

ON

When actuator (switch-over 
valve) is not active and actua-
tor relay is active (ignition 
switch ON).

OFF

DECEL G-SEN

Longitudinal accelera-
tion detected by Decel 
G-Sensor

Vehicle stopped

Approx. 0 G

BRC-107, "Yaw Rate/
Side/Decel G Sensor 
System Inspection"

Vehicle running

-1.7 to 1.7 G

PRESS SENSOR

Brake fluid pressure 
detected by pressure 
sensor

Do not step on the Brake pedal 
(When ignition switch is ON)

Approx. 0 bar

—

Step on the Brake pedal 
(When ignition switch is ON)

-40 to 300 bar

PRESS SEN 2

Brake fluid pressure 
detected by pressure 
sensor

Do not step on the Brake pedal 
(When ignition switch is ON)

Approx. 0 bar

—

Step on the Brake pedal 
(When ignition switch is ON)

-40 to 300 bar

FLUID LEV SW

ON/OFF status of 
brake fluid level switch

When brake fluid level switch 
ON

ON

DI-33, "WARNING 
LAMPS"

When brake fluid level switch 
OFF 

OFF

VDC SIGNAL
TCS SIGNAL
ABS SIGNAL
EBD SIGNAL
HDC SIGNAL
HSA SIGNAL

Signal status

VDC active
TCS active
ABS active
EBD active
HDC active
HSA active

ON

VDC system
TCS system
ABS system
EBD system
HDC system
HSA system

VDC not active
TCS not active
ABS not active
EBD not active
HDC not active
HSA not active

OFF 

VDC FAIL SIG
TCS FAIL SIG
ABS FAIL SIG
EBD FAIL SIG

Fail signal status

VDC fail
TCS fail
ABS fail
EBD fail

ON

VDC system
TCS system
ABS system
EBD system

VDC normal
TCS normal
ABS normal
EBD normal

OFF

Monitor item

Display content

Data monitor

Note: Error inspection 

checklist

Condition

Reference value in 

normal operation

BRC-92

[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS

2006 Pathfinder

OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Note 3: ON/OFF timing of VDC OFF indicator lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC OFF switch is ON.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation.) And when VDC OFF switch is
OFF.
Note 4: SLIP indicator lamp ON/OFF timing
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC/TCS function is acti-
vated while driving.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Flashing: VDC/TCS function is active during driving.