Nissan Titan A60. Manual - part 280

TRANSFER CONTROL UNIT

DLN-59

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: TX15B]

DLN

CAUTION:

When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

NOTE:

Data are reference value and are measured between each terminal and ground.

DTC Index

INFOID:0000000006179477

DTC CHART

Y/L

Transfer shift high relay moni-
tor

• Vehicle stopped
• Engine running
• A/T selector le-

ver N position

• Brake pedal de-

pressed

4WD shift switch: 2WD to 4H or 4H to 4LO
or 2WD to 4LO (while actuator motor is op-
erating)

Battery voltage
→ 0V

Except the above

G/B

Transfer shift low relay moni-
tor

4WD shift switch: 4LO to 4H or 4H to 2WD
or 4LO to 2WD (while actuator motor is op-
erating)

Battery voltage
→ 0V

Except the above

Transfer shift low relay

4WD shift switch: 4LO to 4H or 4H to 2WD
or 4LO to 2WD

Except the above

Battery voltage

Terminal

Wire

color

Item

Condition

Data (Approx.)

DTC

CONSULT-III

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 suspended.

DLN-20

[P1802]

CONTROL UNIT (1,2,3)

Malfunction is detected in the memory (RAM) system of transfer control unit.

DLN-23

[P1803]

Malfunction is detected in the memory (ROM) system of transfer control unit.

[P1804]

Malfunction is detected in the memory (EEPROM) system of transfer control
unit.

[P1807]

VHCL SPEED SEN·AT

• Malfunction is detected in output shaft revolution signal that is output from

TCM through CAN communication.

• Improper signal is input while driving.

DLN-25

[P1808]

VHCL SPEED SEN·ABS

• Malfunction is detected in vehicle speed signal that is output from ABS actu-

ator and electric unit (control unit) through CAN communication.

• Improper signal is input while driving.

DLN-26

[P1809]

CONTROL UNIT 4

AD converter system of transfer control unit is malfunctioning.

DLN-23

[P1810]

4L POSI SW TF

Improper signal from 4LO switch is input due to open or short circuit.

DLN-27

[P1811]

BATTERY VOLTAGE

Power supply voltage for transfer control unit is abnormally low while driving.

DLN-20

[P1813]

4WD MODE SW

More than two switch inputs are simultaneously detected due to short circuit of
4WD shift switch.

DLN-30

[P1814]

4WD DETECT SWITCH

Improper signal from wait detection switch is input due to open or short circuit.

DLN-36

[P1816]

PNP SW/CIRC

When A/T transmission range switch signal is malfunction or communication er-
ror between the vehicles.

DLN-39

[P1817]

SHIFT ACTUATOR

• Motor does not operate properly due to open or short circuit in actuator motor.
• Malfunction is detected in the actuator motor. (When 4WD shift switch is op-

erated and actuator motor is not operated)

• Malfunction is detected in transfer shift high relay or transfer shift low relay.

DLN-40

[P1818]

SHIFT ACT POSI SW

• Improper signal from actuator position switch is input due to open or short cir-

cuit.

• Malfunction is detected in actuator position switch.

DLN-47

[P1819]

SHIFT ACT CIR

• Malfunction is detected in transfer shut off relay 1 and transfer shut off relay 2.
• Malfunction occurs in transfer control device drive circuit.

DLN-50

DLN-60

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: TX15B]

TRANSFER CONTROL UNIT

NOTE:
If SHIFT ACT POSI SW [P1818] or SHIFT ACT CIR [P1819] is displayed, first erase self-diagnostic results. (SHIFT ACT POSI SW
[P1818] or SHIFT ACT CIR [P1819] may be displayed after installing transfer control unit or transfer assembly.)

FLASH CODE CHART

[P1820]

ENGINE SPEED SIG

• Malfunction is detected in engine speed signal that is output from ECM

through CAN communication.

• Improper signal is input while driving.

DLN-53

[U1010]

CONTROL UNIT (CAN)

Detecting error during the initial diagnosis of CAN controller of transfer control
unit.

DLN-54

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

Flashing pattern

Item

Diagnostic item is detected when...

Reference

Output shaft revolution signal (from TCM)

• Malfunction is detected in output shaft revolution signal

that is output from TCM through CAN communication.

• Improper signal is input while driving.

DLN-25

Vehicle speed signal (from ABS)

• Malfunction is detected in vehicle speed signal that is

output from ABS actuator and electric unit (control unit)
through CAN communication.

• Improper signal is input while driving.

DLN-26

CAN communication

Malfunction has been detected from CAN communication.

DLN-13

AD converter

AD converter system of transfer control unit is malfunc-
tioning.

DLN-23

4LO switch

Improper signal from 4LO switch is input due to open or
short circuit.

DLN-27

Engine speed signal

• Malfunction is detected in engine speed signal that is

output from ECM through CAN communication.

• Improper signal is input while driving.

DLN-53

Power supply

Power supply voltage for transfer control unit is abnormal-
ly low while driving.

DLN-20

4WD shift switch

More than two switch inputs are simultaneously detected
due to short circuit of 4WD shift switch.

DLN-30

Wait detection switch

Improper signal from wait detection switch is input due to
open or short circuit.

DLN-36

Actuator motor

• Motor does not operate properly due to open or short

circuit in actuator motor.

• Malfunction is detected in the actuator motor. (When

4WD shift switch is operated and actuator motor is not
operated.)

• Malfunction is detected in transfer shift high relay or

transfer shift low relay.

DLN-40

Actuator position switch

• Improper signal from actuator position switch is input

due to open or short circuit.

• Malfunction is detected in the actuator position switch.

DLN-47

Transfer control device

• Malfunction is detected in transfer shut off relay 1 and

transfer shut off 2.

• Malfunction occurs in transfer control device drive cir-

cuit.

DLN-50

Transmission range switch signal

When A/T transmission range switch signal is malfunction
or communication error between the vehicles.

DLN-39

Repeats flicker-

ing every 0.25

sec.

Data erase display

• Power supply failure of memory back-up.
• Battery is disconnected for a long time.
• Battery performance is poor.

DLN-20

TRANSFER CONTROL UNIT

DLN-61

< ECU DIAGNOSIS INFORMATION >

[TRANSFER: TX15B]

DLN

NOTE:
If actuator position switch or transfer control device is displayed, first erase self-diagnostic results. (They may be displayed after install-
ing transfer control unit or transfer assembly.)

Repeats flicker-

ing every 2 to 5

sec.

—

Circuits that the self-diagnosis covers have no malfunc-
tion.

—

No flickering

Transmission range switch or 4WD shift
switch

Transmission range switch or 4WD shift switch circuit is
shorted or open.

DLN-39

DLN-30

Flashing pattern