Nissan Pathfinder (2012 year). Instruction — part 190
P1831 VDC OPERATION SIGNAL (ABS)
DLN-85
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX14B]
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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
.
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
.
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
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.
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
.
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
.
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
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
.
August 2012
2012 Pathfinder
U1010 CONTROL UNIT (CAN)
DLN-87
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX14B]
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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/
Is DTC U1010 detected?
YES
>> Proceed to diagnosis procedure. Refer to
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]
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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]
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N
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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
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