2005 NISSAN NAVARA control unit

TROUBLE DIAGNOSIS
TF-47
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TF
DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE”. Refer toTF-44, "CONSULT-II SETTING PROCEDURE"
.
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-II performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed in real time.
Display Item List
´: Standard –: Not applicable
Monitored item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
VHCL/S SEN·FR [km/h] or [mph]´–´For ABS models, wheel speed calculated
by ABS actuator and electric unit (control
unit). Signal input with CAN communica-
tion line.
VHCL/S SEN·RR [km/h] or [mph]´–´For ABS models, wheel speed calculated
by TCM. Signal input with CAN communi-
cation line.
ENGINE SPEED [rpm]´–´Engine speed is displayed.
Signal input with CAN communication line.
BATTERY VOLT [V]´–´Power supply voltage for transfer control
unit.
2WD SWITCH [ON/OFF]´–´
4WD shift switch signal status is dis-
played.
(4L means 4LO of 4WD shift switch.) 4H SWITCH [ON/OFF]´–´
4L SWITCH [ON/OFF]´–´
4L POSI SW [ON/OFF]´–´This means 4LO switch.
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
transfer 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 MON 1 [ON/OFF] – –´Check signal for transfer control unit sig-
nal output
SHIFT ACT 2 [ON/OFF] –´´Output condition to actuator motor (coun-
terclockwise)
SHIFT AC MON 2 [ON/OFF] – –´Check signal for transfer control unit sig-
nal output
SFT ACT/R MON [ON/OFF] – –´Operating condition of actuator motor
relay (integrated in transfer control unit)
SHIFT POS SW 1 [ON/OFF]´–´Condition of actuator position switch 1
SHIFT POS SW 2 [ON/OFF]´–´Condition of actuator position switch 2
SHIFT POS SW 3 [ON/OFF]´–´Condition of actuator position switch 3
SHIFT POS SW 4 [ON/OFF]´–´Condition of actuator position switch 4

TF-48
TROUBLE DIAGNOSIS
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.
Vo l ta g e [V ] – –´The value measured by the voltage probe
is displayed.
Frequency [Hz] – –´
The value measured by the pulse probe is
displayed. DUTY-HI (high) [%] – –´
DUTY-LOW (low) [%] – –´
PLS WIDTH-HI [msec] – –´
PLS WIDTH-LOW [msec] – –´ Monitored item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU

TF-50
TROUBLE DIAGNOSIS
Judgement Self-diagnosis
When a malfunction is detected, the malfunction route is indicated by flickering of the 4WD warning lamp.
PDIA0227E
Flickering pattern Items Diagnostic item is detected when... Check item
2Output shaft revolution
signal (from TCM)
lMalfunction is detected in output shaft revolution signal
that is output from TCM through CAN communication.
lImproper signal is input while driving.TF-55, "
Output Shaft
Revolution Signal
(TCM)"
3Vehicle speed signal
[from ABS actuator and
electric unit (control
unit)]
lMalfunction is detected in vehicle speed signal that is
output from ABS actuator and electric unit (control unit)
through CAN communication.
lImproper signal is input while driving.TF-55, "
Vehicle Speed
Sensor (ABS)"
4 CAN communication Malfunction has been detected from CAN communication.TF-82, "CAN Commu-
nication Line"
5 AD converterAD converter system of transfer control unit is malfunction-
ing.TF-54, "Transfer Con-
trol Unit"
6 4LO switchImproper signal from 4LO switch is input due to open or
short circuit.TF-56, "4LO Switch"
7Engine speed signal
(from ECM)
lMalfunction is detected in engine speed signal that is out-
put from ECM through CAN communication.
lImproper signal is input while driving.TF-81, "
Engine Speed
Signal (ECM)"
8 Power supplyPower supply voltage for transfer control unit is abnormally
low while driving.TF-52, "
Power Supply
Circuit For Transfer
Control Unit"
9 4WD shift switchMore than two switch inputs are simultaneously detected
due to short circuit of 4WD shift switch.TF-59, "4WD Shift
Switch"
10 Wait detection switchImproper signal from wait detection switch is input due to
open or short circuit.TF-63, "Wait Detection
Switch"
11 Actuator motor
lMotor does not operate properly due to open or short cir-
cuit in actuator motor.
lMalfunction is detected in the actuator motor. (When
4WD shift switch is operated and actuator motor is not
operated.)
lMalfunction is detected in transfer shift high relay and
transfer shift low relay.TF-67, "
Actuator Motor"
12Actuator position
switch
lImproper signal from actuator position switch is input due
to open or short circuit.
lMalfunction is detected in the actuator position switch.TF-75, "
Actuator Posi-
tion Switch"
13 Transfer control device
lMalfunction is detected in transfer shut off relay 1 and
transfer shut off relay 2.
lMalfunction occurs in transfer control device drive circuit.TF-52, "
Power Supply
Circuit For Transfer
Control Unit",TF-78,
"Transfer Control
Device"
14 PNP switch signalWhen A/T PNP switch signal is malfunction or communica-
tion error between the vehicles.TF-66, "PNP Switch
Signal (TCM)"

TROUBLE DIAGNOSIS
TF-51
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TFNOTE:
If flickering pattern 12 or 13 is displayed, first erase self-diagnostic results. Flickering pattern 12 or 13 may be displayed after installing
transfer control unit or transfer assembly.
ERASE SELF-DIAGNOSIS
lIn order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.
lHowever, this information is erased by turning ignition switch “OFF” after performing self-diagnostics or by
erasing the memory using the CONSULT-II.
Repeats flickering
every 0.25 sec.Data erase displaylPower supply malfunction of memory back-up.
lBattery is disconnected for a long time.
lBattery performance is poor.TF-52, "
Power Supply
Circuit For Transfer
Control Unit"
Repeats flickering
every 2 to 5 sec.— Circuits that the self-diagnosis covers have no malfunction. —
No flickeringPNP switch or 4WD
shift switchPNP switch or 4WD shift switch circuit is shorted or open.TF-66, "
PNP Switch
Signal (TCM)"orTF-
59, "4WD Shift Switch"
Flickering pattern Items Diagnostic item is detected when... Check item

TF-52
TROUBLE DIAGNOSIS FOR SYSTEM
TROUBLE DIAGNOSIS FOR SYSTEM
PFP:00000
Power Supply Circuit For Transfer Control UnitEDS0031Y
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.Monitored item [Unit] Content Condition Display value
BATTERY VOLT [V]Power supply voltage for
transfer control unitIgnition switch: ON Battery voltage
Te r m i n a lWire
colorItem Condition Data (Approx.)
6 B Ground Always 0V
18 B Ground Always 0V
19 RPower supply
(Memory back-up)Ignition switch: ON
Battery voltage
Ignition switch: OFF
25 LG Ignition switch monitorIgnition switch: ON Battery voltage
Ignition switch: OFF 0V
32 B Ground Always 0V
40 V Transfer shut off relayIgnition switch: ON 0V
Ignition switch: OFF
(5 seconds after ignition switch is turned OFF)Battery voltage
44 Y Power supplyIgnition switch: ON Battery voltage
Ignition switch: OFF
(5 seconds after ignition switch is turned OFF)0V
45 GR Power supplyIgnition switch: ON Battery voltage
Ignition switch: OFF
(5 seconds after ignition switch is turned OFF)0V

TROUBLE DIAGNOSIS FOR SYSTEM
TF-53
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DIAGNOSTIC PROCEDURE
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.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer control unit harness connector
terminals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
l40A fusible link (No.J, located in the fuse and fusible link box). Refer toPG-4, "POWER SUP-
PLY ROUTING CIRCUIT".
l10A fuses [No. 18, located in the fuse block (J/B) and No. 63 and 64 located in the fuse and
relay box]. Refer toPG-4, "
POWER SUPPLY ROUTING CIRCUIT".
lHarness for short or open between battery and transfer control unit harness connector M105
terminal 19.
lHarness for short or open between battery and transfer shut off relay 2 harness connector E85
terminals 1 and 3.
lHarness for short or open between battery and transfer shut off relay 1 harness connector E84
terminal 3.
lHarness for short or open between ignition switch and transfer control unit harness connector
M105 terminal 25.
lHarness for short or open between ignition switch and transfer shut off relay 1 harness connec-
tor E84 terminal 1.
lHarness for short or open between transfer shut off relay 2 harness connector E85 terminal 5
and transfer control unit harness connector M106 terminals 44, 45.
lHarness for short or open between transfer shut off relay 1 harness connector E84 terminal 5
and transfer control unit harness connector M106 terminals 44, 45.
lHarness for short or open between transfer shut off relay 2 harness connector E85 terminal 2
and transfer control unit harness connector M106 terminal 40.
lHarness for open between transfer shut off relay 1 harness connector E84 terminal 2 and
ground.
lBattery and ignition switch. Refer toPG-4, "POWER SUPPLY ROUTING CIRCUIT".
lTransfer shut off relay 1, 2. Refer toTF-54, "COMPONENT INSPECTION".
Connector Terminal Voltage (Approx.)
M10519 - Ground Battery voltage
25 - Ground 0V
M10640 - Ground Battery voltage
44 - Ground
0V
45 - Ground
SDIA3360E
Connector Terminal Voltage (Approx.)
M10519 - Ground
Battery voltage
25 - Ground
M10640 - Ground 0V
44 - Ground
Battery voltage
45 - Ground
SDIA3361E

TF-54
TROUBLE DIAGNOSIS FOR SYSTEM
2.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect transfer control unit harness connector.
3. Check continuity between transfer control unit harness connec-
tor M105 terminals 6 and 18, and M106 terminal 32 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or con-
nectors.
3.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer toTF-38, "
Transfer Control Unit Input/Output Signal Ref-
erence Values".
OK or NG
OK >> GO TO 4.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
4.CHECK DTC
Perform the self-diagnosis, after driving vehicle.
OK or NG
OK >>INSPECTION END
NG >> Replace transfer control unit. Refer toTF-100, "
Removal and Installation".
COMPONENT INSPECTION
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shut off relay 1 and transfer shut off relay 2. Refer toTF-21, "
Location of Electrical Parts"
.
3. Apply 12V direct current between transfer shut off relay termi-
nals 1 and 2.
4. Check continuity between relay terminals 3 and 5.
5. If NG, replace transfer shut off relay 1 or transfer shut off relay 2.
Refer toTF-21, "
Location of Electrical Parts".
Transfer Control UnitEDS0031Z
DIAGNOSTIC PROCEDURE
1.INSPECTION START
Do you have CONSULT-II?
YESorNO
YES >> GO TO 2.
NO >> GO TO 3.Continuity should exist.
SDIA3362E
Condition Continuity
12V direct current supply between terminals 1 and 2 Yes
OFF No
SCIA1245E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-55
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TF
2.PERFORM SELF-DIAGNOSIS (WITH CONSULT-II)
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the
“CONTROL UNIT 1 [P1802]”,“CONTROL UNIT 2 [P1803]”,“CONTROL UNIT 3 [P1804]”or“CONTROL
UNIT 4 [P1809]”displayed?
YES >> Replace transfer control unit. Refer toTF-100, "Removal and Installation".
NO >>INSPECTION END
3.PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-II)
Without CONSULT-II
1. Perform the self-diagnosis and then erase self-diagnostic results. Refer toTF-49, "
SELF-DIAGNOSTIC
PROCEDURE (WITHOUT CONSULT-II)"andTF-51, "ERASE SELF-DIAGNOSIS".
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate AD converter?
YES >> Replace transfer control unit. Refer toTF-100, "Removal and Installation".
NO >>INSPECTION END
Output Shaft Revolution Signal (TCM)EDS00320
DIAGNOSTIC PROCEDURE
1.CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer toAT-80, "
SELF-DIAGNOSTIC RESULT MODE".
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 toTF-38, "
Transfer Control Unit Input/Output Signal Ref-
erence Values".
OK or NG
OK >> GO TO 3.
NG >> 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.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with TCM again. Refer toAT-80, "
SELF-DIAGNOSTIC RESULT MODE".
Vehicle Speed Sensor (ABS)EDS00321
DIAGNOSTIC PROCEDURE
1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer toBRC-18, "
Self-Diagnosis".
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.