Nissan Frontier. Manual — part 279
DLN-18
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
Refer to "Judgement Self-diagnosis".
Diagnostic Procedure (M/T models)
1. Warm up engine.
2. Turn ignition switch “ON” and “OFF” at least twice, and then turn ignition switch “OFF”.
3. Move M/T shift lever to neutral position.
4. Turn 4WD shift switch to “2WD” position.
5. Turn ignition switch “ON”. (Do not start engine.)
6. 4WD warning lamp should turn ON.
If 4WD warning lamp does not turn ON, refer to
.
7. Move M/T shift lever to any position other than neutral.
8. Turn 4WD shift switch to “2WD”, “4H” and “2WD” in order.
9. Move M/T shift lever to neutral position.
10. Turn 4WD shift switch to “4H”, “2WD” and “4H” in order.
11. Move M/T shift lever to any position other than neutral.
12. Turn 4WD shift switch to “2WD” position.
13. Move M/T shift lever to neutral position.
14. Read the flickering of 4WD warning lamp.
Refer to "Judgement Self-diagnosis".
Self-diagnosis example
DATA MONITOR
Operation Procedure
1. Connect “CONSULT.”
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
×: Standard –: Not applicable
PDIA0227E
Monitor Item (Unit)
Selection
Description
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELECTION
FROM MENU
VHCL/S SEN-FR [km/h] or [mph]
×
–
×
Wheel speed calculated by ABS actuator
and electric unit (control unit).
Signal input with CAN communication line.
VHCL/S SEN-RR [km/h] or [mph]
×
–
×
Wheel speed calculated by TCM.
Signal input with CAN communication line.
ENGINE SPEED [rpm]
×
–
×
Engine speed is displayed.
Signal input with CAN communication line.
BATTERY VOLT [V]
×
–
×
Power supply voltage for transfer control
unit.
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-19
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
2WD SWITCH [On/Off]
×
–
×
4WD shift switch signal status is displayed.
(4L means 4LO of 4WD shift switch.)
4H SWITCH [On/Off]
×
–
×
4L SWITCH [On/Off]
×
–
×
4L POSI SW [On/Off]
×
–
×
4LO switch signal status is displayed.
ATP SWITCH [On/Off]
×
–
×
ATP switch signal status is displayed.
WAIT DETCT SW [On/Off]
×
–
×
Wait detection switch signal status is dis-
played.
4WD MODE [2H/4H/4L]
–
×
×
Control status of 4WD recognized by trans-
fer control unit. (2WD, 4H or 4LO)
VHCL/S COMP [km/h] or [mph]
–
×
×
Vehicle speed recognized by transfer con-
trol unit.
SHIFT ACT 1 [On/Off]
–
×
×
Output condition to actuator motor (clock-
wise)
SHIFT AC MON1 [On/Off]
–
–
×
Check signal for transfer control unit signal
output
SHIFT ACT 2 [On/Off]
–
×
×
Output condition to actuator motor (coun-
terclockwise)
SHIFT AC MON2 [On/Off]
–
–
×
Check signal for transfer control unit signal
output
SFT ACT/R MON [On/Off]
–
–
×
Operating condition of actuator motor relay
(integrated in transfer control unit)
SHIFT POS SW1 [On/Off]
×
–
×
Condition of actuator position switch 1
SHIFT POS SW2 [On/Off]
×
–
×
Condition of actuator position switch 2
SHIFT POS SW3 [On/Off]
×
–
×
Condition of actuator position switch 3
SHIFT POS SW4 [On/Off]
×
–
×
Condition of actuator position switch 4
4WD FAIL LAMP [On/Off]
–
×
×
Control status of 4WD warning lamp is dis-
played.
2WD IND [On/Off]
–
–
×
Control status of 4WD shift indicator lamp
(rear) is displayed.
4H IND [On/Off]
–
–
×
Control status of 4WD shift indicator lamp
(front and center) is displayed.
4L IND [On/Off]
–
–
×
Control status of 4LO indicator lamp is dis-
played.
Monitor Item (Unit)
Selection
Description
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELECTION
FROM MENU
DLN-20
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
INFOID:0000000009479633
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts.
Reference page
SUSPECTED PARTS
(Possible cause)
T
R
ANSFER F
LUID (Level
low)
T
R
ANSFER F
LUID (W
rong)
T
R
ANSFER F
LUID (Level
too high)
LI
QUI
D
GASKET (Dam
ag
ed
)
O-RI
NG (W
orn
or da
ma
ge
d)
OIL
SEAL
(W
orn
or da
ma
ge
d)
S
H
IFT
FO
RK
(W
orn
or d
am
a
ged
)
GEAR (W
orn
o
r da
ma
ge
d)
B
EARING
(W
orn
or
da
ma
ge
d)
Symptom
Noise
1
2
3
3
Transfer fluid leakage
3
1
2
2
2
Hard to shift or will not shift
1
1
2
P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
DLN-21
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
DTC/CIRCUIT DIAGNOSIS
P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL
UNIT
Description
INFOID:0000000009479634
The transfer control unit controls the transfer control device which controls shifts between 4H and 4LO and
between 2WD and 4WD. When the vehicle battery is removed, the power supply to the transfer control unit is
interrupted, and self-diagnosis memory function is suspended. These DTCs may also set when the power
supply voltage for the transfer control unit is abnormally low while driving.
DTC Logic
INFOID:0000000009479635
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Are DTCs “P1801 or P1811 detected?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009479636
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Check voltage between transfer control unit harness connector
terminals and ground.
DTC
CONSULT
Diagnostic item is detected when...
Reference
[P1801]
*INITIAL START*
Due to removal of battery which cuts off
power supply to transfer control unit,
self-diagnosis memory function is sus-
pended.
[P1811]
BATTERY VOLTAGE
Power supply voltage for transfer control
unit is abnormally low while driving.
Connector
Terminal
Voltage (Approx.)
M152
19 - Ground
Battery voltage
25 - Ground
0V
M153
40 - Ground
Battery voltage
44 - Ground
0V
45 - Ground
SDIA3360E
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