Nissan X-Trail 32. Manual — part 662
P181B INCOMPLETE SELFSHUT
DLN-59
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit. Refer to
NO
>> Repair or replace error-detected parts.
5.
CHECK 4WD CONTROL UNIT GROUND
1.
Turn the ignition switch OFF.
2.
Check the continuity between 4WD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
“P181B” is detected, Replace 4WD control unit. Refer to
DLN-76, "Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
4WD control unit
—
Continuity
Connector
Terminal
B5
15
Ground
Not existed
4WD control unit
—
Continuity
Connector
Terminal
B5
10
Ground
Existed
11
DLN-60
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
P181D ENGINE TORQUE SIGNAL
P181D ENGINE TORQUE SIGNAL
DTC Description
INFOID:0000000010992004
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Malfunction of engine control system
• Internal malfunction of 4WD control unit
FAIL-SAFE
4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Drive the vehicle for a while.
2.
Stop the vehicle.
3.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P181D” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010992005
1.
PERFORM ECM SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ENGINE”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
(MR20DD),
(QR25DE).
NO
>> GO TO 2.
2.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “P181D”
is detected, Replace 4WD control unit. Refer to
DLN-76, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P181D
ENGINE SYSTEM
(Engine system)
Malfunction related to engine signal has been detected.
P181F INCOMPLETE CALIBRATION
DLN-61
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C
E
F
G
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A
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DLN
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P181F INCOMPLETE CALIBRATION
DTC Description
INFOID:0000000010992006
DTC DETECTION LOGIC
POSSIBLE CAUSE
Writing unit characteristics are incomplete.
FAIL-SAFE
4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P181F” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010992007
1.
PERFORM WRITING UNIT CHARACTERISTICS
1.
Erase self-diagnostic result for “ALL MODE AWD/4WD”.
2.
Perform writing unit characteristics. Refer to
3.
Turn the ignition switch OFF to ON.
4.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC except “P181F” detected?
YES
>> Perform trouble diagnosis for detected DTC. Refer to
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT
Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to
Is DTC “P181F” detected?
YES
>> Replace 4WD control unit. Refer to
DLN-76, "Removal and Installation"
NO
>> Check 4WD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P181F
INCOMP CALIBRATION
(Incomplete calibration)
When incomplete writing unit characteristics of electric con-
trolled coupling are detected.
DLN-62
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
U1000 CAN COMM CIRCUIT
U1000 CAN COMM CIRCUIT
DTC Description
INFOID:0000000010992008
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 DETECTION LOGIC
POSSIBLE CAUSE
• CAN communication error
• Internal malfunction of 4WD control unit
FAIL-SAFE
4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “U1000” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010992009
LAN-17, "Trouble Diagnosis Flow Chart"
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
U1000
CAN COMM CIRCUIT
(CAN communication circuit)
4WD control unit is not transmitting/receiving CAN commu-
nication signal for 2 seconds or more.
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