engine control NISSAN NAVARA 2005 Repair Workshop Manual

RFD-56
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
TROUBLE DIAGNOSIS FOR SYSTEM
3.CHECK DIFFERENTIAL LOCK CONTROL UNIT
Check differential lock control unit input/output signal. Refer toRFD-48, "
Differential Lock Control Unit Input/
Output Signal Reference Values".
OK or NG
OK >> GO TO 4.
NG >> Check differential lock control unit pin terminals for damage or loose connection with harness con-
nector. If any items are damaged, repair or replace damaged parts.
4.CHECK DTC
Perform the self-diagnosis, after driving the vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Replace differential lock control unit. Refer toRFD-76, "
Removal and Installation".
Differential Lock Control UnitEDS003B2
DIAGNOSTIC PROCEDURE
1.PERFORM SELF-DIAGNOSIS
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “DIFF LOCK” 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 [P1834]”,“CONTROL UNIT 2 [P1835]”,“CONTROL UNIT 3 [P1836]”or“CONTROL
UNIT 4 [P1837]”displayed?
YES >> Replace differential lock control unit. Refer toRFD-76, "Removal and Installation".
NO >>INSPECTION END
Differential Lock Mode SwitchEDS003B3
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIFFERENTIAL LOCK 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.
Monitor item [Unit] Content Condition Display value
D-LOCK SW SIG [ON/
OFF]Condition of differential
lock mode switchDifferential lock mode switch: ON ON
Differential lock mode switch: OFF OFF
Te r m i n a lWire
colorItem Condition Data (Approx.)
9YDifferential lock mode switch
(ON)Ignition switch: ONDifferential lock mode switch: ON Battery voltage
Differential lock mode switch: OFF 0V
22 GDifferential lock mode switch
(OFF)Ignition switch: ONDifferential lock mode switch: ON 0V
Differential lock mode switch: OFF Battery voltage

TROUBLE DIAGNOSIS FOR SYSTEM
RFD-57
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
C
E
F
G
H
I
J
K
L
MA
B
RFD
DIAGNOSTIC PROCEDURE
1.CHECK DIFFERENTIAL LOCK MODE SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “DIFF LOCK” with CONSULT-II.
3. Read out ON/OFF switching action of “D-LOCK SW SIG”.
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between differential lock control unit harness
connector terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Monitor item ConditionDisplay
value
D-LOCK SW SIG
lVehicle stopped
lEngine runningDifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
SDIA2540E
Connector Terminal ConditionVo l ta g e
(Approx.)
M1079-
Ground
Ignition switch: ONDifferential lock mode
switch: ONBattery
voltage
Differential lock mode
switch: OFF0V
22 -
GroundDifferential lock mode
switch: ON0V
Differential lock mode
switch: OFFBattery
voltage
SDIA2568E

RFD-60
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
TROUBLE DIAGNOSIS FOR SYSTEM
Differential Lock Position Switch
EDS003B4
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIFFERENTIAL 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.Monitor item [Unit] Content Condition Display value
D-LOCK POS SW [ON/
OFF]Condition of differential
lock position switch
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode
switch: ON
(DIFF LOCK indicator
lamp: ON)ON
Differential lock mode
switch: OFF
(DIFF LOCK indicator
lamp: OFF)OFF
Te r m i n a lWire
colorItem Condition Data (Approx.)
20 BRDifferential lock position
switch
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode switch: ON
(DIFF LOCK indicator lamp: ON)0V
Differential lock mode switch: OFF
(DIFF LOCK indicator lamp: OFF)Battery voltage

TROUBLE DIAGNOSIS FOR SYSTEM
RFD-61
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
C
E
F
G
H
I
J
K
L
MA
B
RFD
DIAGNOSTIC PROCEDURE
1.CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “DIFF LOCK” with CONSULT-II.
3. Read out ON/OFF switching action of “D-LOCK POS SW SIG”.
Without CONSULT-II
1. Start engine.
2. Check voltage between differential lock control unit harness
connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect differential lock position switch harness connector.
3. Check continuity between differential lock position switch har-
ness connector C22 terminal 2 and ground.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
Monitor item ConditionDisplay
value
D-LOCK POS
SW SIG
lVehicle stopped
lEngine running
l4WD shift
switch: 4LODifferential lock mode
switch: ON
(DIFF LOCK indicator
lamp: ON)ON
Differential lock mode
switch: OFF
(DIFF LOCK indicator
lamp: OFF)OFF
SDIA2538E
Connector Terminal ConditionVo l ta g e
(Approx.)
M10720 -
Ground
lVehicle stopped
lEngine running
l4WD shift switch:
4LODifferential lock mode
switch: ON
(DIFF LOCK indicator
lamp: ON)0V
Differential lock mode
switch: OFF
(DIFF LOCK indicator
lamp: OFF)Battery
voltage
SDIA2570E
Continuity should exist.
SDIA3428E

TROUBLE DIAGNOSIS FOR SYSTEM
RFD-63
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
C
E
F
G
H
I
J
K
L
MA
B
RFD
COMPONENT INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect differential lock position switch harness connector.
3. Remove differential lock position switch. Refer toRFD-45, "
Location of Electrical Parts".
4. Pull differential lock position switch and check continuity
between differential lock position switch harness connector ter-
minals.
5. If NG, replace differential lock position switch.
Differential Lock Solenoid RelayEDS003B5
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
1.CHECK DIFFERENTIAL LOCK SOLENOID SYSTEM
Perform self-diagnosis. Refer toRFD-51, "
SELF-DIAG RESULTS MODE".
Is
“RELAY [P1844]”displayed?
YES >> Perform trouble diagnosis for differential lock solenoid. Refer toRFD-64, "Differential Lock Sole-
noid".
NO >> GO TO 2.
2.CHECK DIFFERENTIAL LOCK SOLENOID RELAY SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “DIFF LOCK” with CONSULT-II.
3. Read out ON/OFF switching action of “RELAY ON”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
Terminal Condition Continuity
1-2Pull differential position switch Yes
Release Differential position switch No
SDIA3429E
Monitor item [Unit] Content Condition Display value
RELAY ON [ON/OFF]Operating condition of dif-
ferential lock solenoid
relay (integrated in differ-
ential lock control unit)
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
Monitor item ConditionDisplay
value
RELAY ON
lVehicle stopped
lEngine running
l4WD shift
switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
SDIA2642E

RFD-64
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
TROUBLE DIAGNOSIS FOR SYSTEM
3.CHECK DIFFERENTIAL LOCK CONTROL UNIT
Check differential lock control unit input/output signal. Refer toRFD-48, "
Differential Lock Control Unit Input/
Output Signal Reference Values".
OK or NG
OK >> GO TO 4.
NG >> Check differential lock control unit pin terminals for damage or loose connection with harness con-
nector. If any item is damaged, repair or replace damaged parts.
4.CHECK DTC
Perform the self-diagnosis, after driving the vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Replace differential lock control unit. Refer toRFD-76, "
Removal and Installation".
Differential Lock SolenoidEDS003B6
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIFFERENTIAL LOCK 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.Monitor item [Unit] Content Condition Display value
RELAY ON [ON/OFF]Operating condition of dif-
ferential lock solenoid
relay (integrated in differ-
ential lock control unit)
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
RELAY MTR [ON/OFF]Control status of differen-
tial lock solenoid relay
(integrated in differential
lock control unit)
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
SOL MTR [ON/OFF]Control status of differen-
tial lock solenoid
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
Te r m i n a lWire
colorItem Condition Data (Approx.)
11 GR Differential lock solenoid (-)
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode switch: ON 0V
Differential lock mode switch: OFF Battery voltage
12 L Differential lock solenoid (+)
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential lock mode switch: ON 0V
Differential lock mode switch: OFF Battery voltage

TROUBLE DIAGNOSIS FOR SYSTEM
RFD-65
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
C
E
F
G
H
I
J
K
L
MA
B
RFD
DIAGNOSTIC PROCEDURE
1.CHECK DIFFERENTIAL SOLENOID SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “DIFF LOCK” with CONSULT-II.
3. Read out ON/OFF switching action of “RELAY ON”, “RELAY
MTR”, “SOL MTR”.
Without CONSULT-II
1. Start engine.
2. Check voltage between differential lock control unit harness
connector terminal and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
Monitor item ConditionDisplay
value
RELAY ON
lVehicle stopped
lEngine running
l4WD shift
switch: 4LODifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
RELAY MTRDifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
SOL MTRDifferential lock mode
switch: ONON
Differential lock mode
switch: OFFOFF
Connector Terminal ConditionData
(Approx.)
M10711 -
Ground
lVehicle stopped
lEngine running
l4WD shift switch: 4LODifferential
lock mode
switch: ON0V
Differential
lock mode
switch: OFFBattery
voltage
12 -
GroundDifferential
lock mode
switch: ON0V
Differential
lock mode
switch: OFFBattery
voltage
SDIA2539E
SDIA2565E

RFD-70
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
TROUBLE DIAGNOSIS FOR SYMPTOMS
TROUBLE DIAGNOSIS FOR SYMPTOMS
PFP:00007
DIFF LOCK Indicator Lamp Does Not Turn ONEDS003B9
SYMPTOM:
DIFF LOCK indicator lamp does not turn ON for approx. 1 second when turning ignition switch to
“ON”.
DIAGNOSTIC PROCEDURE
1.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer toRFD-51, "
SELF-DIAG RESULTS MODE".
Is
“CAN COMM CIRCUIT”displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer toRFD-69, "CAN Communication
Line".
NO >> GO TO 2.
2.CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect differential lock control unit harness connector.
3. Check voltage between differential lock control unit harness
connector terminals and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between differential lock control unit harness
connector terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.
l10A fuse [No. 3 or 19, located in fuse block (J/B)]
lHarness for short or open between battery and differential lock control unit harness connector
terminal 15
lHarness for short or open between ignition switch and differential lock control unit harness con-
nector terminals 1 and 2
lBattery and ignition switch. Refer toPG-4, "POWER SUPPLY ROUTING CIRCUIT".
Connector Terminal Voltage (Approx.)
M1071 - Ground 0V
2 - Ground 0V
15 - Ground Battery voltage
SDIA2562E
Connector Terminal Voltage (Approx.)
M1071 - Ground
Battery voltage 2 - Ground
15 - Ground
SDIA2563E

TROUBLE DIAGNOSIS FOR SYMPTOMS
RFD-71
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
C
E
F
G
H
I
J
K
L
MA
B
RFD
3.CHECK DIFFERENTIAL LOCK CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect differential lock control unit harness connector.
3. Check continuity between differential lock control unit harness
connector M107 terminals 3, 10 and ground.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
4.CHECK COMBINATION METER POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness connector.
3. Check voltage between combination meter harness connector
terminal and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between combination meter harness connector
terminal and ground.
OK or NG
OK >> GO TO 5.
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)]
lHarness for short or open between ignition switch and combination meter harness connector
terminal 16.
lIgnition switch. Refer toPG-4, "POWER SUPPLY ROUTING CIRCUIT". Continuity should exist.
SDIA2564E
Connector Terminal Voltage (Approx.)
M23 16 - Ground 0V
WDIA0250E
Connector Terminal Voltage (Approx.)
M23 16 - Ground 0V
WDIA0251E

RFD-72
[WITH ELECTRONIC LOCKING DIFFERENTIAL]
TROUBLE DIAGNOSIS FOR SYMPTOMS
5.CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch “OFF”.
2. Disconnect differential lock control unit harness connector and combination meter harness connector.
3. Check continuity between differential lock control unit harness
connector M107 terminal 21 and combination meter harness
connector M23 terminal 25.
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 INDICATOR LAMP CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Connect combination meter harness connector.
3. Disconnect differential lock control unit harness connector.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Ground the following terminals using suitable wiring.
–Differential lock control unit harness connector M107 terminal 21
and ground.
Do indicator lamps turn on?
OK >> GO TO 7.
NG >> Replace combination meter. Refer toDI-27, "
Removal
and Installation of Combination Meter".
7.CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.CHECK DIFFERENTIAL LOCK CONTROL UNIT
Check differential lock control unit input/output signal. Refer toRFD-48, "
Differential Lock Control Unit Input/
Output Signal Reference Values".
OK or NG
OK >>INSPECTION END
NG >> Check differential lock control unit pin terminals for damage or loose connection with harness con-
nector. If any items are damaged, repair or replace damaged parts. Continuity should exist.
WDIA0252E
SDIA3453E