Nissan Pathfinder (2012 year). Manual - part 190

P1831 VDC OPERATION SIGNAL (ABS)

DLN-85

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

P1831 VDC OPERATION SIGNAL (ABS)

Description

INFOID:0000000007357428

Malfunction is detected in the VDC operation signal that is output from ABS actuator and electric unit (control

unit) through CAN communication.

DTC Logic

INFOID:0000000007357429

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1831 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-85, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000007357430

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-138, "CONSULT Func-

tion (ABS)"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-88, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

3.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis with ABS actuator electric unit (control unit) again.

DTC

CONSULT

Diagnostic item is detected when...

Reference

[P1831]

VDC OP SIG

Malfunction is detected in VDC opera-
tion signal that is output from ABS actu-
ator and electric unit (control unit) 
through CAN communication.

Refer to 

DLN-85

.

August 2012

2012 Pathfinder

DLN-86

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX14B]

P1832 TCS OPERATION SIGNAL (ABS)

P1832 TCS OPERATION SIGNAL (ABS)

Description

INFOID:0000000007357431

Malfunction is detected in TCS operation signal that is output from ABS actuator and electric unit (control unit)

through CAN communication.

DTC Logic

INFOID:0000000007357432

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1832 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-86, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000007357433

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-138, "CONSULT Func-

tion (ABS)"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-88, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

3.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis with ABS actuator electric unit (control unit) again.

DTC

CONSULT

Diagnostic item is detected when...

Reference

[P1832]

TCS OP SIG

Malfunction is detected in TCS operation 
signal that is output from ABS actuator 
and electric unit (control unit) through 
CAN communication.

Refer to 

DLN-86

.

August 2012

2012 Pathfinder

U1010 CONTROL UNIT (CAN)

DLN-87

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000007357434

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.

Each control unit communicate data but selectively reads required data only.

DTC Logic

INFOID:0000000007357435

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1. Turn the ignition switch ON.

2. Perform transfer control unit self-diagnosis. Refer to 

DLN-23, "CONSULT Function (ALL MODE AWD/

4WD)"

.

Is DTC U1010 detected?

YES 

>> Proceed to diagnosis procedure. Refer to 

DLN-87, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000007357436

1.

CHECK TRANSFER CONTROL UNIT CONNECTOR

Check transfer control unit connectors for disconnection and deformation.
Is the inspection result normal? 

YES

>> Replace transfer control unit. Refer to 

DLN-140, "Removal and Installation"

.

NO

>> Repair or replace parts as necessary.

DTC

Display item

Malfunction detected condition

Possible cause

U1010

CONTROL UNIT (CAN)

Detecting error during the initial diagno-
sis of CAN controller of transfer control 
unit.

Malfunction of transfer control unit

August 2012

2012 Pathfinder

DLN-88

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

ECU DIAGNOSIS INFORMATION

TRANSFER CONTROL UNIT

Reference Value

INFOID:0000000007357437

VALUE ON THE DIAGNOSIS TOOL

CONSULT data monitor item

Monitored item [Unit]

Content

Condition

Display value

VHCL/S SEN·FR [km/h] 
or [mph]

Wheel speed (Front 
wheel)

Vehicle stopped

0 km/h (0 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Approximately 
equal to the indica-
tion on speedome-
ter (Inside of 

±

10%)

VHCL/S SEN·RR [km/h] 
or [mph]

Wheel speed (Rear 
wheel)

Vehicle stopped

0 km/h (0 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Approximately 
equal to the indica-
tion on speedome-
ter (Inside of 

±

10%)

ENGINE SPEED [rpm]

Engine speed

Engine stopped
(Engine speed: Less than 400 rpm)

0 rpm

Engine running
(Engine speed: 400 rpm or more)

Approximately 
equal to the indica-
tion on tachometer

THRTL POS SEN [0.0/8]

Accelerator pedal posi-
tion (APP) sensor condi-
tion of throttle opening

When depressing accelerator pedal
(Value rises gradually in response to throttle position.)

0.0/8 - 8.0/8

FLUID TEMP SE [V]

Transfer fluid tempera-
ture signal voltage

Transfer fluid temperature approx. 20 - 80

°

C (68 - 176

°

F) Approx. 1.1 - 0.3V

BATTERY VOLT [V]

Power supply voltage for 
transfer control unit

Ignition switch: ON

Battery voltage

2WD SWITCH [On/Off]

Input condition from 4WD 
shift switch

4WD shift switch: 2WD

On

4WD shift switch: AUTO, 4H or 4LO

Off

AUTO SWITCH [On/Off]

Input condition from 4WD 
shift switch

4WD shift switch: AUTO

On

4WD shift switch: 2WD, 4H or 4LO

Off

LOCK SWITCH [On/Off]

Input condition from 4WD 
shift switch

4WD shift switch: 4H

On

4WD shift switch: 2WD, AUTO or 4LO

Off

4L SWITCH [On/Off]

Input condition from 4WD 
shift switch

4WD shift switch: 4LO

On

4WD shift switch: 2WD, AUTO or 4H

Off

N POSI SW TF [On/Off]

Condition of neutral-4LO 
switch

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD, 
AUTO or 4H

Off

4WD shift switch: 4H to 
4LO (While actuator mo-
tor is operating.)

Off

→

On

4WD shift switch: 4LO to 
4H (While actuator motor 
is operating.)

On

→

Off

4WD shift switch: 4LO

On

August 2012

2012 Pathfinder

TRANSFER CONTROL UNIT

DLN-89

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

ATP SWITCH [On/Off]

Condition of ATP switch

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch
: 4H to 4LO or 4LO to 4H
(While actuator motor is 
operating.)

On

Except the above

Off

WAIT DETCT SW [On/
Off]

Condition of wait detec-
tion switch

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD, 
AUTO or 4H

Off

4WD shift switch: 4H to 
4LO (While actuator mo-
tor is operating.)

Off

→

On

4WD shift switch: 4LO to 
4H (While actuator motor 
is operating.)

On

→

Off

4WD shift switch: 4LO

On

LINE PRES SW [On/Off]

Condition of line pres-
sure switch

• A/T selector lever D position
• 4WD shift switch: AUTO

On

• Except the above
• The vehicle has been left at 

room temperature for 5 
minutes and more with ig-
nition switch in OFF posi-
tion.

• Ignition switch: ON
• A/T selector lever: P or 

N position

• 4WD shift switch: other 

than AUTO

Off

CL PRES SW [On/Off]

Condition of clutch pres-
sure switch

• Vehicle stopped
• Engine running
• A/T selector lever D position
• 4WD shift switch: AUTO or 4H (Wait function is not op-

erating.)

On

• Vehicle stopped
• Engine running
• 4WD shift switch: 2WD (Wait function is not operating.)

Off

N POSI SW AT [On/Off]

Input condition from 
transmission range 
switch

• Vehicle stopped
• Engine running
• Brake pedal depressed

A/T selector lever posi-
tion: N

On

Except the above

Off

R POSI SW AT [On/Off]

Input condition from 
transmission range 
switch

• Vehicle stopped
• Engine running
• Brake pedal depressed

A/T selector lever posi-
tion: R

On

Except the above

Off

P POSI SW AT [On/Off]

Input condition from 
transmission range 
switch

• Vehicle stopped
• Engine running
• Brake pedal depressed

A/T selector lever posi-
tion: P

On

Except the above

Off

ABS OPER SW [On/Off]

Condition of ABS operat-
ing

ABS is operating.

On

ABS is not operating.

Off

VDC OPER SW [On/Off]

Condition of VDC operat-
ing

VDC is operating.

On

VDC is not operating.

Off

TCS OPER SW [On/Off]

Condition of TCS operat-
ing

TCS is operating.

On

TCS is not operating.

Off

THROTTLE POSI [0.0/8]

Condition of throttle 
opening

When depressing accelerator pedal
(Value rises gradually in response to throttle position.)

0.0/8 - 8.0/8

4WD MODE [AUTO/
LOCK/2WD/4L]

Control status of 4WD
(Output condition of 4WD 
shift indicator lamp and 
4LO indicator lamp)

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD

2WD

4WD shift switch: AUTO

AUTO

4WD shift switch: 4H

LOCK

4WD shift switch: 4LO

4L

Monitored item [Unit]

Content

Condition

Display value

August 2012

2012 Pathfinder

DLN-90

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

VHCL/S COMP [km/h] or 
[mph]

Vehicle speed

Vehicle stopped

0 km/h (0 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Approximately 
equal to the indica-
tion on speedome-
ter (Inside of 

±

10%)

COMP CL TORQ [kgm]

Condition of control 
torque

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD

0 kg-m

4WD shift switch: AUTO

39 - 1,353 N·m

(4 - 138 kg-m, 29 - 

998 ft-lb)

4WD shift switch: 4H or 
4LO

1,353 N·m

(138 kg-m, 998 ft-

lb)

DUTY SOLENOID [%]

Condition of clutch pres-
sure solenoid

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD

4%

4WD shift switch: AUTO

96 - 4%

4WD shift switch: 4H or 
4LO

4%

2-4WD SOL [On/Off]

Condition of 2-4WD shift 
solenoid valve

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD

Off

4WD shift switch: AUTO

On

4WD shift switch: 4H

4WD shift switch: 4LO

4WD shift switch: AUTO 
(Wait function is operat-
ing.)

Off

4WD shift switch: 4H 
(Wait function is operat-
ing.)

Off

2-4WD SOL MON [On/
Off]

Check signal for transfer 
control unit signal output

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 2WD

Off

4WD shift switch: AUTO

On

4WD shift switch: 4H

4WD shift switch: 4LO

4WD shift switch: AUTO 
(Wait function is operat-
ing.)

Off

4WD shift switch: 4H 
(Wait function is operat-
ing.)

Off

MOTOR RELAY [On/Off]

Condition of transfer mo-
tor relay

• Accelerator pedal de-

pressed

• Vehicle stopped
• Engine running
• Brake pedal depressed

4WD shift switch: 2WD

Off

4WD shift switch: AUTO 
or 4LO (A/T selector lever 
P or N position)

Off

(On for approx. 2 
sec. after shifting 

to P and N.)

4WD shift switch: AUTO 
or 4LO (Except for A/T se-
lector lever P or N posi-
tion)

On

4WD shift switch: 4H (A/T 
selector lever P position)

Off

(On for approx. 2 
sec. after shifting 

to P.)

4WD shift switch: 4H (Ex-
cept for A/T selector lever 
P position)

On

Monitored item [Unit]

Content

Condition

Display value

August 2012

2012 Pathfinder

TRANSFER CONTROL UNIT

DLN-91

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

MOTOR RLY MON [On/
Off]

Check signal for transfer 
control unit signal output

• Accelerator pedal de-

pressed

• Vehicle stopped
• Engine running
• Brake pedal depressed

4WD shift switch: 2WD

Off

4WD shift switch: AUTO 
or 4LO (A/T selector lever 
P or N position)

Off

(On for approx. 2 
sec. after shifting 

to P and N.)

4WD shift switch: AUTO 
or 4LO (Except for A/T se-
lector lever P or N posi-
tion)

On

4WD shift switch: 4H (A/T 
selector lever P position)

Off

(On for approx. 2 
sec. after shifting 

to P.)

4WD shift switch: 4H (Ex-
cept for A/T selector lever 
P position)

On

4WD FAIL LAMP [On/
Off]

Condition of 4WD warn-
ing lamp

4WD warning lamp: ON

On

4WD warning lamp: OFF

Off

2WD IND [On/Off]

Condition of 4WD shift in-
dicator lamp (2WD indi-
cator lamp)

2WD indicator lamp of 4WD shift indicator lamp: OFF

Off

2WD indicator lamp of 4WD shift indicator lamp: ON

On

AUTO IND [On/Off]

Condition of 4WD shift in-
dicator lamp (AUTO indi-
cator lamp)

AUTO indicator lamp of 4WD shift indicator lamp: OFF

Off

AUTO indicator lamp of 4WD shift indicator lamp: ON

On

LOCK IND [On/Off]

Condition of 4WD shift in-
dicator lamp (Lock indi-
cator lamp)

Lock indicator lamp of 4WD shift indicator lamp: OFF

Off

Lock indicator lamp of 4WD shift indicator lamp: ON

On

4L IND [On/Off]

Condition of 4LO indica-
tor lamp condition

4LO indicator lamp: OFF

Off

4LO indicator lamp: ON

On

ATP IND [On/Off]

Condition of ATP indica-
tor lamp 

ATP indicator lamp: ON

On

ATP indicator lamp: OFF

Off

SHIFT POS SW1 [On/
Off]

Condition of actuator po-
sition switch 1
(Low)

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4LO

On

4WD shift switch: 2WD, 
AUTO or 4H

Off

SHIFT POS SW2 [On/
Off]

Condition of actuator po-
sition switch 2
(High)

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4H, 
AUTO or 2WD

On

4WD shift switch: 4LO

Off

SHIFT ACT 1 [On/Off]

Output condition to actu-
ator motor (High)

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4H to 
4LO (Wait function is op-
erating.)

On

Except the above

Off

SHIFT AC MON1 [On/
Off]

Check signal for transfer 
control unit signal output

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4H to 
4LO (Wait function is op-
erating.)

On

Except the above

Off

SHIFT ACT 2 [On/Off]

Output condition to actu-
ator motor (Low)

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4LO to 
4H (Wait function is oper-
ating.)

On

Except the above

Off

Monitored item [Unit]

Content

Condition

Display value

August 2012

2012 Pathfinder

DLN-92

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

PHYSICAL VALUES

Terminal Layout

SHIFT AC MON2 [On/
Off]

Check signal for transfer 
control unit signal output

• Vehicle stopped
• Engine running
• A/T selector lever N posi-

tion

• Brake pedal depressed

4WD shift switch: 4LO to 
4H (Wait function is oper-
ating.)

On

Except the above

Off

T/F F SPEED [km/h] or 
[mph]

Displayed, but do not use.

A/T R SPEED [km/h] or 
[mph]

Condition of vehicle 
speed sensor A/T (output 
speed sensor)

During driving

Approximately 
matches the out-
put shaft speed.

AT GEAR POSI [1/2/3/4/
5]

Condition of A/T selector 
lever position

Displays actual A/T gear position.

1
2
3
4
5

Monitored item [Unit]

Content

Condition

Display value

WDIA0384E

Terminal

Wire 

color

Item

Condition

Data (Approx.)

1

GR

2-4WD shift solenoid valve

• Vehicle stopped
• Engine running
• A/T selector lever 

“N” position

• Brake pedal de-

pressed

4WD shift switch: 2WD

0V

4WD shift switch: AUTO, 4H or 4LO

Battery voltage

2

V

4WD shift indicator lamp 
(2WD indicator lamp)

2WD indicator lamp: OFF

Battery voltage

2WD indicator lamp: ON

0V

3

B

Ground

Always

0V

4

SB

Transfer shift high relay

• Vehicle stopped
• Engine running
• A/T selector lever 

“N” position

• Brake pedal de-

pressed

4WD shift switch: 4H to 4LO (“Wait” func-
tion is operating.)

Battery voltage

Except the above

0V

5

GR

4WD  warning  lamp

4WD warning lamp: ON

0V

4WD warning lamp: OFF

Battery voltage

6

B

Ground

Always

0V

7

L

CAN-H

—

—

8

P

CAN-L

—

—

9

G

4WD shift switch
(2WD)

Ignition switch: ON

4WD shift switch: 2WD

Battery voltage

4WD shift switch: AUTO, 4H or 4LO

0V

August 2012

2012 Pathfinder