2005 NISSAN NAVARA control unit

TROUBLE DIAGNOSIS FOR SYSTEM
TF-81
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TF
5.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
“SHIFT ACT CIR [P1819]”displayed?
YES >> Replace transfer control unit. Refer toTF-100, "Removal and Installation".
NO >>INSPECTION END
6.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 transfer control device?
YES >> Replace transfer control unit. Refer toTF-100, "Removal and Installation".
NO >>INSPECTION END
Engine Speed Signal (ECM)EDS00329
DIAGNOSTIC PROCEDURE
1.CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer toEC-27, "
ON BOARD DIAGNOSTIC (OBD) SYSTEM".
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 ECM again. Refer toEC-27, "
ON BOARD DIAGNOSTIC (OBD) SYS-
TEM".

TF-82
TROUBLE DIAGNOSIS FOR SYSTEM
CAN Communication Line
EDS0032A
DIAGNOSTIC PROCEDURE
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with in CONSULT-II.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]”displayed?
YES >> Print out CONSULT-II screen and go toLAN-3, "Precau-
tions When Using CONSULT-II".
NO >>INSPECTION END
AT P S w i t c hEDS0032B
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.
SDIA2390E
Monitored item [Unit] Content Condition Display value
ATP SWITCH [ON/OFF] Condition of ATP switch
lVehicle stopped
lEngine running
lA/T selector lever “N”
position with brake
pedal depressed.4WD shift switch:
4H to 4LO or 4LO to 4H
(While actuator motor is
operating.)ON
Except the above OFF
Te r m i n a lWire
colorItem Condition Data (Approx.)
23 R ATP switch
lVehicle stopped
lEngine running
lA/T selector
lever “N” position
with brake pedal
depressed.4WD shift switch:
4H to 4LO or 4LO to 4H
(While actuator motor is operating.)0V
Except the above Battery voltage

TROUBLE DIAGNOSIS FOR SYSTEM
TF-83
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DIAGNOSTIC PROCEDURE
1.CHECK ATP 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 “ATP SWITCH”.
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.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ATP SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the ATP switch harness connector.
3. Check continuity between transfer control unit harness connec-
tor M105 terminal 23 and ATP switch harness connector F41
terminal 8.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
Condition Display value
lVehicle stopped
lEngine running
lA/T selector lever
“N” position with
brake pedal
depressed.4WD shift switch: 4H to 4LO or 4LO to 4H
(While actuator motor is operating.)ON
Except the above OFF
SDIA2391E
Connector Terminal ConditionVoltage
(Approx.)
M10523 -
Ground
lVehicle stopped
lEngine running
lA/T selector lever
“N” position with
brake pedal
depressed.4WD shift switch:
4H to 4LO or 4LO to
4H
(While actuator motor
is operating.)0V
Except the aboveBattery
voltage
SDIA3375E
Continuity should exist.
SDIA3376E

TF-84
TROUBLE DIAGNOSIS FOR SYSTEM
3.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect ATP switch harness connector.
3. Check continuity between ATP switch harness connector F41
terminal 9 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 ATP SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove ATP switch. Refer toTF-21, "
Location of Electrical Parts".
3. Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.
OK or NG
OK >> GO TO 5.
NG >> Replace ATP switch. Refer toTF-21, "
Location of Elec-
trical 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.
6.CHECK ATP WARNING LAMP
1. Turn ignition switch “ON”. (Do not start engine.)
2. Shift A/T selector lever to “N” position and engage the parking brake.
3. Switch 4WD shift switch from 4H to 4LO or 4LO to 4H.
Does ATP warning lamp turn
“ON”, while actuator motor is operating?
YES >>INSPECTION END
NO >> Go toTF-96, "
ATP Warning Lamp Does Not Turn ON". Continuity should exist.
SDIA2394E
Terminal Condition Continuity
8-9Push ATP switch Yes
Release ATP switch No
SDIA2395E

TROUBLE DIAGNOSIS FOR SYSTEM
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COMPONENT INSPECTION
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect ATP switch harness connector.
3. Remove ATP switch. Refer toTF-21, "
Location of Electrical Parts".
4. Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.
5. If NG, replace the ATP switch. Refer toTF-21, "
Location of Elec-
trical Parts".
Park/Neutral Position SwitchEDS0032C
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.
DIAGNOSTIC PROCEDURE
1.CHECK PARK/NEUTRAL POSITION SWITCH SIGNAL
1. Start engine.
2. Check voltage between transfer control unit harness connector
M105 terminal 33 and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Terminal Condition Continuity
8-9Push ATP switch Yes
Release ATP switch No
SDIA2395E
TerminalWire
colorItem Condition Data (Approx.)
33 P Park/Neutral position switch Ignition switch: ONM/T shift lever neutral position 0V
Except the above Battery voltage
Connector Terminal ConditionVoltage
(Approx.)
M10533 -
GroundIgnition switch: ONM/T shift lever neutral
position0V
Except the aboveBattery
voltage
WDIA0245E

TF-86
TROUBLE DIAGNOSIS FOR SYSTEM
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND PARK/NEUTRAL POSITION
SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the park/neutral position switch harness connec-
tor.
3. Check continuity between transfer control unit harness connec-
tor M105 terminal 33 and park/neutral position switch harness
connector F38 terminal 1.
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 park/neutral position switch harness connector.
3. Check continuity between park/neutral position switch harness
connector F38 terminal 2 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 PARK/NEUTRAL POSITION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove park/neutral position switch. Refer toTF-21, "
Location of Electrical Parts".
3. Push and release park/neutral position switch and check conti-
nuity between park/neutral position switch terminals 1 and 2.
OK or NG
OK >> GO TO 5.
NG >> Replace park/neutral position 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 >>INSPECTION END
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.
WDIA0246E
Continuity should exist.
WDIA0247E
Terminal Condition Continuity
1-2Push park/neutral position switch Yes
Release park/neutral position switch No
WDIA0248E

TROUBLE DIAGNOSIS FOR SYMPTOMS
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DIAGNOSTIC PROCEDURE
1.CHECK TRANSFER CONTROL UNIT 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
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-90
TROUBLE DIAGNOSIS FOR SYMPTOMS
2.CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connectors.
3. Check continuity between transfer control unit harness connec-
tor M105 terminals 6, 18, M106 terminal 32 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >>
lRepair open circuit or short to power in harness or
connectors.
lHarness for short or open between transfer shut off
relay harness connector E85 terminal 2 and transfer
control unit harness connector M106 terminal 40.
3.CHECK COMBINATION METER POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect combination meter harness connector.
3. Check voltage between combination meter harness connector
terminals and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between combination meter harness connector
terminals and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.
l10A fuse [No. 14, located in the fuse block (J/B)] or
ignition switch.
lHarness for short or open between ignition switch and combination meter harness connector
M23 terminal 16. Continuity should exist.
SDIA3362E
Connector Terminal Voltage (Approx.)
M23 16 - Ground 0V
WDIA0178E
Connector Terminal Voltage (Approx.)
M23 16 - Ground Battery voltage
WDIA0179E