Nissan Pathfinder (2008 year). Manual - part 187

DLN-80

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1830 ABS OPERATION SIGNAL (ABS)

P1830 ABS OPERATION SIGNAL (ABS)

Description

INFOID:0000000001728407

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

DTC Logic

INFOID:0000000001728408

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1830 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-80, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728409

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

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

BRC-141, "CONSULT-III

Function (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-83, "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 and electric unit (control unit) again.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1830]

ABS OP SIG

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

Refer to 

DLN-80

.

P1831 VDC OPERATION SIGNAL (ABS)

DLN-81

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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P1831 VDC OPERATION SIGNAL (ABS)

Description

INFOID:0000000001728410

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:0000000001728411

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-81, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728412

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT

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

BRC-141, "CONSULT-III

Function (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-83, "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-III

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-81

.

DLN-82

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1832 TCS OPERATION SIGNAL (ABS)

P1832 TCS OPERATION SIGNAL (ABS)

Description

INFOID:0000000001728413

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

DTC Logic

INFOID:0000000001728414

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-82, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728415

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT

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

BRC-141, "CONSULT-III

Function (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-83, "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-III

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-82

.

TRANSFER CONTROL UNIT

DLN-83

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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ECU DIAGNOSIS

TRANSFER CONTROL UNIT

Reference Value

INFOID:0000000001728416

VALUE ON THE DIAGNOSIS TOOL

CONSULT-III 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 [V]

Accelertor pedal position 
(APP) sensor signal volt-
age

Accelerator pedal: Released

Approx. 0.5V

Accelerator pedal: Fully depressed

Approx. 4.0V

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

DLN-84

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

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 A/T 
PNP 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 A/T 
PNP 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 A/T 
PNP 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

TRANSFER CONTROL UNIT

DLN-85

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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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

DLN-86

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

MOTOR RELAY 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 ACT1 [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 ACT2 [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

TRANSFER CONTROL UNIT

DLN-87

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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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 (Revo-
lution 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