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
.
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
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