display INFINITI QX56 2006 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2006, Model line: QX56, Model: INFINITI QX56 2006Pages: 3383, PDF Size: 51.76 MB
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TROUBLE DIAGNOSIS FOR SYSTEMTF-95
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Revision: November 2009 2006 QX56
Transfer MotorEDS002II
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
Monitored item Content ConditionDisplay value
MOTOR RELAY [ON/
OFF] Condition of transfer motor
relay
Accelerator pedal
depressed
Vehicle stopped
Engine running
Brake pedal depressed4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
or 4LO (A/T selector lever
“ P ” or “N ” position) OFF
("ON" for approx. 2
sec. after shifting to “P ” and “ N”.)
4WD shift switch: AUTO
or 4LO (Except for A/T
selector lever “P ” or “ N”
position) ON
4WD shift switch: 4H (A/T
selector lever “P ” posi-
tion) OFF
("ON" for approx. 2
sec. after shifting to “P ”.)
4WD shift switch: 4H
(Except for A/T selector
lever “P ” position) ON
MOTOR RELAY MON
[ON/OFF] Check signal for transfer
control unit signal output
Accelerator pedal
depressed
Vehicle stopped
Engine running
Brake pedal depressed4WD shift switch: 2WD
OFF
4WD shift switch: AUTO
or 4LO (A/T selector lever
“ P ” or “N ” position) OFF
("ON" for approx. 2
sec. after shifting to “P ” and “ N”.)
4WD shift switch: AUTO
or 4LO (Except for A/T
selector lever “P ” or “ N”
position) ON
4WD shift switch: 4H (A/T
selector lever “P ” posi-
tion) OFF
("ON" for approx. 2
sec. after shifting to “P ”.)
4WD shift switch: 4H
(Except for A/T selector
lever “P ” position) ON
Page 3202 of 3383
TROUBLE DIAGNOSIS FOR SYSTEMTF-97
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Revision: November 2009 2006 QX56
DIAGNOSTIC PROCEDURE
1. CHECK TRANSFER MOTOR RELAY 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 “MOTOR RELAY” and “MOTOR RELAY
MON ”.
Without CONSULT-II
1. Start engine.
Monitored item Condition Display value
(Approx.)
MOTOR
RELAY
Accelerator
pedal depressed
Vehicle stopped
Engine running
Brake pedal
depressed 4WD shift switch: 2WD OFF
4WD shift switch: AUTO or
4LO (A/T selector lever
“P ” or
“ N ” position) OFF
("ON" for
approx. 2 sec.
after shifting to
“
P ” and “ N”.)
4WD shift switch: AUTO or
4LO (Except for A/T selector
lever “P ” or “N ” position) ON
4WD shift switch: 4H (A/T
selector lever “P ” position) OFF
("ON" for
approx. 2 sec.
after shifting to
“
P ”.)
4WD shift switch: 4H (Except
for A/T selector lever “ P” posi-
tion) ON
MOTOR
RELAY
MON
Accelerator
pedal depressed
Vehicle stopped
Engine running
Brake pedal
depressed 4WD shift switch: 2WD OFF
4WD shift switch: AUTO or
4LO (A/T selector lever
“P ” or
“ N ” position) OFF
("ON" for
approx. 2 sec.
after shifting to
“
P ” and “ N”.)
4WD shift switch: AUTO or
4LO (Except for A/T selector
lever “P ” or “N ” position) ON
4WD shift switch: 4H (A/T
selector lever “P ” position) OFF
("ON" for
approx. 2 sec.
after shifting to
“
P ”.)
4WD shift switch: 4H (Except
for A/T selector lever “ P” posi-
tion) ON
SDIA2734E
Page 3207 of 3383
TF-102
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
COMPONENT INSPECTION
Transfer Motor Relay
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer motor relay. Refer to TF-22, "
Location of Electrical Parts" .
3. Apply 12V direct current between transfer motor relay terminals 1 and 2.
4. Check continuity between relay terminals 3 and 5.
5. If NG, replace transfer motor relay. Refer to TF-22, "
Location of
Electrical Parts" .
Transfer Motor
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer motor. Refer to TF-142, "
Removal and Installation" .
3. Apply 12V direct current between transfer motor terminals 14 and 15.
4. If transfer motor does not operate, replace transfer motor. Refer to TF-142, "
Removal and Installation" .
Transfer Fluid TemperatureEDS002IJ
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. Condition
Continuity
12V direct current supply between terminals 1 and 2 Yes
OFF No
LDIA0098E
LDIA0097E
Monitored item [Unit]Content ConditionDisplay value
(Approx.)
FLUID TEMP SE [V] Condition of transfer fluid
temperature Transfer fluid temperature approx. 20 - 80
°C (68 -
176° F) 1.1 - 0.3V
Te r m i n a lWire
color Item
ConditionData (Approx.)
28 B/G Sensor ground Always0V
31 G Transfer fluid temperature
sensor
Ignition switch: ONTransfer fluid temperature approx. 20°C
(68
°F) 1.1V
Transfer fluid temperature approx. 80°C
(176 °F) 0.3V
Page 3208 of 3383
TROUBLE DIAGNOSIS FOR SYSTEMTF-103
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DIAGNOSTIC PROCEDURE
1. CHECK TRANSFER FLUID TEMPERATURE SENSOR 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 “FLUID TEMP SE”.
Without CONSULT-II
1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER TERMINAL CORD
ASSEMBLY 1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and transfer terminal cord assembly harness connec- tor.
3. Check continuity between the following terminals.
–Transfer control unit harness connector E143 terminal 28 and
transfer terminal cord assembly harness connector F56 terminal
3.
–Transfer control unit harness connector E143 terminal 31 and
transfer terminal cord assembly harness connector F56 terminal
2.
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
(Approx.)
Transfer fluid temperature approx. 20 - 80 °C (68 - 176°F) 1.1 - 0.3V
SDIA2741E
Connector Terminal ConditionData
(Approx.)
E143 28 -
Ground Always
0V
31 -
Ground Ignition switch:
ON Transfer fluid temperature
approx. 20
°C (68°F) 1.1V
Transfer fluid temperature
approx. 80 °C (176°F) 0.3V
SDIA2742E
Continuity should exist.
SDIA2743E
Page 3210 of 3383
TROUBLE DIAGNOSIS FOR SYSTEMTF-105
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Revision: November 2009 2006 QX56
Clutch Pressure SwitchEDS002IK
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 ConditionDisplay value
CL PRES SW [ON /
OFF] Condition of clutch pres-
sure switch
Vehicle stopped
Engine running
A/T selector lever “
D” position
4WD shift switch: AUTO or 4H ( “Wait ” function is not
operating.) ON
Vehicle stopped
Engine running
4WD shift switch: 2WD (
“Wait ” function is not oper-
ating.) OFF
Terminal
Wire
color Item
ConditionData (Approx.)
34 BR Clutch pressure switch
Vehicle stopped
Engine running
A/T selector
lever “D ” position 4WD shift switch: AUTO or 4H (
“Wait ”
function is not operating.) 0V
Vehicle stopped
Engine running4WD shift switch: 2WD (
“Wait ” function is
not operating.) Battery voltage
Page 3211 of 3383
TF-106
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
DIAGNOSTIC PROCEDURE
1. CHECK CLUTCH PRESSURE SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR ” mode for “ALL MODE AWD/4WD ” with CONSULT-II.
3. Read out ON/OFF switching action of the “CL PRES SW ” while
operating 4WD shift switch.
Without CONSULT-II
1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND CLUTCH PRESSURE SWITCH
1. Turn ignition switch “ OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer terminal cord assembly harness con- nector.
3. Check continuity between transfer control unit harness connec- tor E143 terminal 34 and transfer terminal cord assembly har-
ness connector F56 terminal 7
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
Ignition switch: ON
A/T selector lever “D ”
position 4WD shift switch: AUTO or 4H
(
“ Wait ” function is not operating.) ON
Ignition switch: ON 4WD shift switch: 2WD (
“Wait ”
function is not operating.) OFF
Connector Terminal ConditionVoltage
(Approx.)
E143 34 -
Ground
Ignition switch: ON
A/T selector lever
“ D ” position 4WD shift switch:
AUTO or 4H
(
“ Wait ” function is
not operating.) 0V
Ignition switch: ON 4WD shift switch:
2WD (
“Wait ” func-
tion is not operat-
ing.) Battery
voltage
WDIA0141E
SDIA2746E
Continuity should exist.
SDIA2747E
Page 3213 of 3383
TF-108
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
Line Pressure SwitchEDS002IL
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 ConditionDisplay value
LINE PRES SW [ON/
OFF] Condition of line pressure
switch
A/T selector lever
“D ” position
4WD shift switch: 2WD, AUTO or 4H ON
Except the above
The vehicle has been
left at room tempera-
ture for 5 minutes and
more with ignition
switch in
“OFF ” posi-
tion.Ignition switch: ON
A/T selector lever: "P"
or "N" position
4WD shift switch: other
than AUTO OFF
Terminal
Wire
color Item
ConditionData (Approx.)
35 BR/W Line pressure switch
Ignition switch: ON
A/T selector lever “D ” posi-
tion4WD shift switch: AUTO 0V
Except the above
The vehicle has been left at
room temperature for 5 min-
utes and more with ignition
switch in “OFF ” position.
Ignition switch: ON
A/T selector lever: "P" or "N"
position
4WD shift switch: other than
AUTO Battery voltage
Page 3214 of 3383
TROUBLE DIAGNOSIS FOR SYSTEMTF-109
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Revision: November 2009 2006 QX56
DIAGNOSTIC PROCEDURE
1. CHECK LINE PRESSURE SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR ” mode for “ALL MODE AWD/4WD ” with CONSULT-II.
3. Read out ON/OFF switching action of “LINE PRES SW ” while
operating 4WD shift switch.
Without CONSULT-II
1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND LINE PRESSURE SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer terminal cord assembly harness con- nector.
3. Check continuity between transfer control unit harness connec- tor E143 terminal 35 and transfer terminal cord assembly har-
ness connector F56 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.
Condition Display value
A/T selector lever “D ” position
4WD shift switch: AUTO ON
Except the above
The vehicle has been left
at room temperature for 5
minutes and more with
ignition switch in “
OFF”
position.Ignition switch: ON
A/T selector lever: "P" or "N"
position
4WD shift switch: other than
AUTO OFF
Connector Terminal Condition Voltage
(Approx.)
E143 35 -
Ground
A/T selector lever
“ D ” position 4WD shift switch:
AUTO
0V
Except the above
The vehicle has
been left at room
temperature for 5
minutes and more
with ignition switch
in
“OFF ” position.
Ignition switch:
ON
A/T selector
lever: "P" or "N"
position
4WD shift
switch: other
than AUTO Battery
voltage
WDIA0142E
SDIA2751E
Continuity should exist.
SDIA2752E
Page 3218 of 3383
TROUBLE DIAGNOSIS FOR SYSTEMTF-113
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Revision: November 2009 2006 QX56
CAN Communication LineEDS002IQ
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 ” within CONSULT-II.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Print CONSULT-II screen and go to LAN-3, "Precautions
When Using CONSULT-II" .
NO >> Inspection End.
ATP SwitchEDS002IR
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.
SDIA1850E
Monitored item [Unit] Content ConditionDisplay value
ATP SWITCH [ON/OFF] Condition of ATP switch
Vehicle stopped
Engine running
A/T selector lever “ N"
Brake pedal depressed 4WD shift switch
: 4H to 4LO or 4LO to 4H
(While actuator motor is
operating.)
ON
Except the above OFF
TerminalWire
color Item
ConditionData (Approx.)
40 L ATP switch
Vehicle stopped
Engine running
A/T selector
lever “N"
Brake pedal
depressed 4WD shift switch: 4H to 4LO or 4LO to 4H
(While actuator motor is operating.)
0V
Except the above Battery voltage
Page 3219 of 3383
TF-114
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
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 “AT P S W I T C H”.
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 E143 terminal 40 and ATP switch harness connector F55 ter-
minal 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
Vehicle stopped
Engine running
A/T selector lever
“N"
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 TerminalConditionVoltage
(Approx.)
E143 40 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“ N"
Brake pedal
depressed 4WD shift switch: 4H
to 4LO or 4LO to 4H
(While actuator motor
is operating.)
0V
Except the above Battery
voltage
SDIA2755E
Continuity should exist.
SDIA2756E