2005 NISSAN NAVARA control unit

TF-64
TROUBLE DIAGNOSIS FOR SYSTEM
DIAGNOSTIC PROCEDURE
1.CHECK WAIT DETECTION SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Read out the value of “WAIT DETCT SW”.
Without CONSULT-II
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Condition Display value
lVehicle stopped
lEngine running
lFor A/T models, A/T selector
lever “N” position with brake
pedal depressed.
lFor M/T models, M/T shift
lever neutral position with
clutch and brake pedal
depressed.4WD shift switch: 4H and 4LO ON
4WD shift switch: 2WD OFF
PDIA0221E
Connector Terminal ConditionVoltage
(Approx.)
M10517 -
Ground
lVehicle stopped
lEngine running
lFor A/T models,
A/T selector lever
“N” position with
brake pedal
depressed.
lFor M/T models,
M/T shift lever
neutral position
withclutchand
brake pedal
depressed.4WD shift switch:
4H and 4LO0V
4WD shift switch: 2WDBattery
voltage
SDIA3367E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-65
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2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connec-
tor M105 terminal 17 and wait detection switch harness connec-
tor F39 terminal 10.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness con-
nector F39 terminal 11 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or con-
nectors.
4.CHECK WAIT DETECTION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch. Refer toTF-21, "
Location of Electrical Parts".
4. Push and release wait detection switch and check continuity
between wait detection switch terminals 10 and 11.
OK or NG
OK >> GO TO 5.
NG >> Replace wait detection switch. Refer toTF-21, "
Location
of Electrical Parts".
5.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 6.
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. Continuity should exist.
SDIA3368E
Continuity should exist.
PDIA0207E
Terminal Condition Continuity
10 - 11Push wait detection switch Yes
Release wait detection switch No
PDIA0208E

TF-66
TROUBLE DIAGNOSIS FOR SYSTEM
6.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
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. Disconnect wait detection switch harness connector.
3. Remove wait detection switch. Refer toTF-21, "
Location of Electrical Parts".
4. Push and release wait detection switch and check continuity
between wait detection switch terminals 10 and 11.
5. If NG, replace the wait detection switch. Refer toTF-21, "
Loca-
tion of Electrical Parts".
PNP Switch Signal (TCM)EDS00325
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 vehicle.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with TCM again. Refer toAT-80, "
SELF-DIAGNOSTIC RESULT MODE".
Terminal Condition Continuity
10 - 11Push wait detection switch Yes
Release wait detection switch No
PDIA0208E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-67
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Actuator MotorEDS00326
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 Content Condition Display value
SHIFT ACT 1 [ON/OFF]Output condition to actua-
tor motor (clockwise)
lVehicle stopped
lEngine running
lFor A/T models, A/T
selector lever “N” posi-
tion with brake pedal
depressed.
lFor M/T models, M/T
shift lever neutral posi-
tion with clutch and
brake pedal depressed.4WD shift switch:
2WDto4Hor4Hto4LO
or 2WD to 4LOON
Except the above OFF
SHIFT AC MON1 [ON/
OFF]Check signal for transfer
control unit signal output4WD shift switch:
2WDto4Hor4Hto4LO
or 2WD to 4LOON
Except the above OFF
SHIFT ACT 2 [ON/OFF]Output condition to actua-
tor motor (counterclock-
wise)4WD shift switch:
4LO to 4H or 4H to 2WD
or 4LO to 2WDON
Except the above OFF
SHIFT AC MON2 [ON/
OFF]Check signal for transfer
control unit signal output4WD shift switch:
4LO to 4H or 4H to 2WD
or 4LO to 2WDON
Except the above OFF
TerminalWire
colorItem Condition Data (Approx.)
27 L Actuator motor power supplyIgnition switch: ON Battery voltage
Ignition switch: OFF
(5 seconds after ignition switch is turned OFF)0V
28 BR Actuator motor (+)
lVehicle stopped
lEngine running
lFor A/T models,
A/T selector
lever “N” position
with brake pedal
depressed.
lFor M/T models,
M/T shift lever
neutral position
with clutch and
brake pedal
depressed.When 4WD shift switch is operated
(while actuator motor is operating)Battery voltage
®0V
When 4WD shift switch is not operated 0V
31 G Actuator motor (-) Always 0V
42 LG Transfer shift high relay4WD shift switch:
2WD to 4H or 4H to 4LO or 2WD to 4LO0V
Except the above Battery voltage
47 OTransfer shift high relay moni-
tor4WD shift switch:
2WD to 4H or 4H to 4LO or 2WD to 4LO
(while actuator motor is operating)Battery voltage
®0V
Except the above 0V
48 RTransfer shift low relay moni-
tor4WD shift switch:
4LO to 4H or 4H to 2WD or 4LO to 2WD
(while actuator motor is operating)Battery voltage
®0V
Except the above 0V
50 Y Transfer shift low relay4WD shift switch:
4LO to 4H or 4H to 2WD or 4LO to 2WD0V
Except the above Battery voltage

TF-68
TROUBLE DIAGNOSIS FOR SYSTEM
DIAGNOSTIC PROCEDURE
1.CHECK ACTUATOR MOTOR SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Read out the value of “SHIFT ACT1”, “SHIFT AC MON1”,
“SHIFT ACT2”, “SHIFT AC MON2”.
Without CONSULT-II
1. Start engine.
2. Depress brake pedal and stop vehicle.
3. For A/T models, move A/T selector lever to “N” position. For M/T models, shift lever to neutral position.
4. Check voltage between transfer control unit harness connector
terminal and ground.
Monitored item Condition Display value
SHIFT ACT1
lVehicle
stopped
lEngine run-
ning
lFor A/T mod-
els, A/T
selector lever
“N” position
with brake
pedal
depressed.
lFor M/T
models, M/T
shift lever
neutral posi-
tion with
clutch and
brake pedal
depressed.4WD shift switch:
2WD to 4H or 4H to 4LO or
2WD to 4LOON
Except the above OFF
SHIFT AC MON14WD shift switch:
2WD to 4H or 4H to 4LO or
2WD to 4LOON
Except the above OFF
SHIFT ACT24WD shift switch:
4LOto4Hor4Hto2WDor
4LO to 2WDON
Except the above OFF
SHIFT AC MON24WD shift switch:
4LOto4Hor4Hto2WDor
4LO to 2WDON
Except the above OFF
PDIA0223E
WDIA0144E

TF-70
TROUBLE DIAGNOSIS FOR SYSTEM
2.CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
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
M106 terminal 27 and ground.
4. Turn ignition switch “ON”.
5. Check voltage between transfer control unit harness connector
M106 terminal 27 and ground.
OK or NG
OK >> GO TO 3.
NG >> 1. Check harness for short or open between transfer
control unit harness connector M106 terminal 27 and
transfer shut off relay 2 harness connector E85 termi-
nal 5 and 10A fuse (No. 63, located in the fuse and relay box). If any items are damaged, repair
or replace damaged parts.
2. Perform trouble diagnosis for power supply circuit. Refer toTF-52, "
Power Supply Circuit For
Transfer Control Unit".
Connector Terminal Voltage (Approx.)
M106 27 - Ground 0V
SDIA2808E
Connector Terminal Voltage (Approx.)
M106 27 - Ground Battery voltage
SDIA2807E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-71
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3.CHECK TRANSFER SHIFT RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay. Refer toTF-21, "
Location of Electrical Parts".
3. Check voltage between transfer control unit harness connector
terminal and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.
lHarness for short or open between transfer control unit harness connector terminal 27 and
transfer shift high relay harness connector E27 terminal 2.
lHarness for short or open between transfer control unit harness connector terminal 27 and
transfer shift low relay harness connector terminal E29 terminal 2.
4.CHECK TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
3. Apply 12V direct current between transfer shift high relay and
transfer shift low relay terminals 1 and 2.
4. Check continuity between relay terminals 3 and 4, 3 and 5.
OK or NG
OK >> GO TO 5.
NG >> Replace transfer shift high relay or transfer shift low relay.
Connector Terminal Voltage (Approx.)
E27 2 - Ground
0V
E29 2 - Ground
SDIA3384E
Connector Terminal Voltage (Approx.)
E27 2 - Ground
Battery voltage
E29 2 - Ground
SDIA3385E
Terminal Condition Continuity
3-412V direct current supply between terminals 1 and 2 No
OFF Yes
3-512V direct current supply between terminals 1 and 2 Yes
OFF No
LDIA0099E

TF-72
TROUBLE DIAGNOSIS FOR SYSTEM
5.CHECK (1): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
–Transfer control unit harness connector M106 terminal 42 and
transfer shift high relay harness connector E27 terminal 1.
–Transfer control unit harness connector M106 terminal 50 and
transfer shift low relay harness connector E29 terminal 1.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK (2): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAYS
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
–Transfer control unit harness connector M106 terminal 28 and
transfer shift high relay harness connector E27 terminal 5.
–Transfer control unit harness connector M106 terminal 28 and
transfer shift low relay harness connector E29 terminal 5.
–Transfer control unit harness connector M106 terminal 31 and
transfer shift high relay harness connector E27 terminal 4.
–Transfer control unit harness connector M106 terminal 31 and
transfer shift low relay harness connector E29 terminal 4.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.Continuity should exist.
SDIA3386E
Continuity should exist.SDIA3387E