Nissan Pathfinder. Manual - part 394

DLN-18

< SYSTEM DESCRIPTION >

[TRANSFER: TY21C]

DIAGNOSIS SYSTEM (4WD CONTROL UNIT)

DIAGNOSIS SYSTEM (4WD CONTROL UNIT)

CONSULT Function

INFOID:0000000009177717

APPLICATION ITEMS

CONSULT can display each diagnostic item using the diagnostic test modes as follows.

*: The following diagnosis information is erased by erasing.

• DTC

• Freeze frame data (FFD)

ECU IDENTIFICATION

4WD control unit part number can be read.

SELF DIAGNOSTIC RESULT

Refer to 

DLN-23, "DTC Index"

.

When “PRSNT” is displayed on self-diagnosis result.

• The system is presently malfunctioning.

When “PAST” is displayed on self-diagnosis result.

• System malfunction in the past is detected, but the system is presently normal.

FREEZE FRAME DATA (FFD)

The following vehicle status is recorded when DTC is detected and is displayed.

DATA MONITOR

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

Diagnostic test mode

Function

ECU Identification

4WD control unit part number can be read.

Self Diagnostic Result

Self-diagnostic results and freeze frame data can be read and erased quickly.*

Data Monitor

Input/Output data in the 4WD control unit can be read.

Active Test

Diagnostic Test Mode in which CONSULT drives some actuators apart from the 4WD control unit 
and also shifts some parameters in a specified range.

Work support

This mode enable a technician to adjust some devices faster and more accurately by following the 
indication on the CONSULT.

Freeze Frame 

Data Item

Description

IGN COUNTER 
[0 - 39]

The number of times that ignition switch is turned ON after the DTC is detected is displayed.
• When “0” is displayed: It indicates that the system is presently malfunctioning.
• When except “0” is displayed: It indicates that system malfunction in the past is detected, but the system is pres-

ently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1

→2→3...38→39.

When the operation number of times exceeds 39, the number do not increase and “39” is displayed until self-diag-
nosis is erased.

Monitor item (Unit)

Remarks

STOP LAMP SW [On/Off]

Stop lamp switch signal status via CAN communication line is displayed.

ENG SPEED SIG [Run/Stop]

Engine status is displayed.

ETS ACTUATOR [On/Off]

Operating condition of 4WD actuator relay (integrated in 4WD control unit) is displayed.

4WD WARN LAMP [On/Off]

Control status of 4WD warning indicator is displayed.

4WD MODE SW [2WD/AUTO/LOCK]

4WD shift switch status is displayed.

4WD MODE MON [2WD/AUTO/LOCK]

Control status of 4WD is displayed.

DIS-TIRE MONI [mm]

Improper size tire installed condition is displayed.

DIAGNOSIS SYSTEM (4WD CONTROL UNIT)

DLN-19

< SYSTEM DESCRIPTION >

[TRANSFER: TY21C]

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ACTIVE TEST

Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data

monitor. 4WD control unit gives drive signal to actuator with receiving command from CONSULT to check

operation of actuator.

CAUTION:

Never energize continuously for a long time.

WORK SUPPORT

P BRAKE SW [On/Off]

Parking switch signal status via CAN communication line is displayed.

BATTERY VOLT [V]

Power supply voltage for 4WD control unit

THRTL POS SEN [%]

Throttle opening status is displayed.

ETS SOLENOID [A]

Monitored value of current at 4WD solenoid

FR RH SENSOR [km/h] or [mph]

Wheel speed calculated by front RH wheel sensor signal is displayed.

FR LH SENSOR [km/h] or [mph]

Wheel speed calculated by front LH wheel sensor signal is displayed.

RR RH SENSOR [km/h] or [mph]

Wheel speed calculated by rear RH wheel sensor signal is displayed.

RR LH SENSOR [km/h] or [mph]

Wheel speed calculated by rear LH wheel sensor signal is displayed.

Monitor item (Unit)

Remarks

Test item

Condition

Description

ETS S/V
(Detects 4WD solenoid)

• Vehicle stopped
• Engine running
• No DTC detected

Change command current value to 4WD solenoid, and then change driving 
mode. (Monitor value is normal if it is within approx. 

±10% of command val-

ue.)
• Qu: Increase current value in increments of 0.2 A
• Qd: Decrease current value in increments of 0.2 A
• UP: Increase current value in increments of 0.02 A
• DOWN: Decrease current value in increments of 0.02 A

Item

Usage

UNIT CHARACTERISTICS DATA

Display the unit characteristics of electric controlled coupling written to 4WD control unit.

UNIT CHARACTERISTICS WRITE

Writes the unit characteristics of electric controlled coupling to 4WD control unit.

DLN-20

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: TY21C]

4WD CONTROL UNIT

ECU DIAGNOSIS INFORMATION

4WD CONTROL UNIT

Reference Value

INFOID:0000000009177718

VALUES ON THE DIAGNOSIS TOOL

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

Monitor item

Condition

Value/Status

STOP LAMP SW

Brake pedal: Depressed

On

Brake pedal: Released

Off

ENG SPEED SIG

Engine stopped
(Engine speed: Less than 400 rpm)

Stop

Engine running
(Engine speed: 400 rpm or more)

Run

ETS ACTUATOR

Engine stopped (Ignition switch: ON)

Off

Engine running

On

4WD WARN LAMP

4WD warning indicator: ON

On

4WD warning indicator: OFF

Off

4WD MODE SW

4WD shift switch: 2WD

2WD

4WD shift switch: AUTO

AUTO

4WD shift switch: LOCK (State of hold of LOCK position)

LOCK

4WD MODE MON

4WD shift switch: 2WD

2WD

4WD shift switch: AUTO

AUTO

4WD shift switch: AUTO 

⇒ LOCK (State of 4WD indicator lamp turn 

ON)

AUTO 

⇒ LOCK

4WD shift switch: LOCK 

⇒ AUTO (State of LOCK indicator lamp 

turn ON)

LOCK 

⇒ AUTO

DIS-TIRE MONI

Vehicle running with normal size tire installed

0 – 4 mm

Vehicle running with improper size tire installed (Front/rear tire size 
difference, wear condition)

4 – 8 mm, 8 – mm

P BRAKE SW

Parking brake operated

On

Parking brake not operated

Off

BATTERY VOLT

Always

Battery voltage

THRTL POS SEN

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

0 – 100%

ETS SOLENOID

Engine running
• At idle speed

Approx. 0.000 A

Engine running
• 3,000 rpm or more constant

Approx. 0.000 – 1.800 A*

FR RH SENSOR

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Nearly matches the speed meter 
display (

±10% or less)

FR LH SENSOR

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Nearly matches the speed meter 
display (

±10% or less)

4WD CONTROL UNIT

DLN-21

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: TY21C]

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*: The values are changed by throttle opening and engine speed.

TERMINAL LAYOUT

PHYSICAL VALUES

RR RH SENSOR

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Nearly matches the speed meter 
display (

±10% or less)

RR LH SENSOR

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Nearly matches the speed meter 
display (

±10%)

Monitor item

Condition

Value/Status

JSDIA0057ZZ

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

+

-

Signal name

Input/

Output

1

(LG)

Ground

4WD solenoid power sup-
ply

Output

Engine speed: At idle

0 V

Engine speed: 3,000 rpm or more constant

2.5 V*

2

(V)

Ground 4WD solenoid ground

—

Always

0 V

5

(V)

Ground 4WD shift switch (AUTO)

Output Ignition switch: ON

4WD shift switch: 2WD

Battery voltage

4WD shift switch: AUTO

0 V

4WD shift switch: LOCK
(State of hold of LOCK position)

0 V

7

(W)

Ground Ignition switch

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

8

(L)

—

CAN-H

Input/

Output

—

—

9

(SB)

Ground

Power supply (4WD sole-
noid)

Input

Always

Battery voltage

10

(B)

Ground Ground

—

Always

0 V

11

(B)

Ground Ground

—

Always

0 V

12

(BG)

Ground 4WD shift switch (2WD)

Output Ignition switch: ON

4WD shift switch: 2WD

0 V

4WD shift switch: AUTO

Battery voltage

4WD shift switch: LOCK
(State of hold of LOCK position)

Battery voltage